NORBERT BARTEL, Ph.D. Distinguished Research Professor

Department of Physics and Astronomy York University, Toronto 416-736-5424, [email protected], www.yorku.ca/bartel

EMPLOYMENT HISTORY:

1992- Professor, Department of Physics and Astronomy, York University, Toronto, Canada

1986-1992 Lecturer. Astronomy, Harvard University, Cambridge, MA, U.S.A.

1983-1992 Research Associate at the Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, U.S.A.

1980-1982 Visiting Scientist at the Massachusetts Institute of Technology, Cambridge, MA, U.S.A.

1978-1980 Research Scientist, Max-Planck-Institut für Radioastronomie, Bonn, Federal Republic of Germany

HONOURS and TITLES:

1979 Otto Hahn Medal, Max-Planck Society, Federal Republic of Germany

2006 Distinguished Research Professor, York University, Toronto, Canada

2015 Established Research Award, Faculty of Science, York University, Toronto, Canada

DEGREES:

1978 Ph.D., Physics/Astronomy University of Bonn and Max-Planck-Institut für Radioastronomie Bonn, Federal Republic of Germany

1975 M.Sc., Diplom in Physics Norbert Bartel Curriculum Vitae

University of Bonn and Max-Planck-Institut für Radioastronomie Bonn, Federal Republic of Germany

1972 B.Sc., Vordiplom in Physics University of Hamburg, Federal Republic of Germany

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PROFESSIONAL SOCIETIES:

Member of the Astronomische Gesellschaft (AG) Member of the American Astronomical Society (AAS) Member of the International Astronomical Union (IAU) Member of the International Union of Radio Science (URSI Commission J) Member of the Canadian Astronomical Society (CASCA)

RESEARCH AREAS:

Radio astronomy and , observational tests of

My research is focussed on galactic and extragalactic compact radio sources such as supernovae, pulsars, black hole candidates, radio stars and the cores of radio galaxies and . With the technique of very-long-baseline interferometry (VLBI) we image these sources and determine their positions, proper motions and kinematics with an angular resolution and precision 1,000 times better than with optical telescopes on Earth.

In particular, we make sequences of images of young, rapidly expanding supernovae, study the interaction of their shock fronts with the circumstellar medium, search for pulsars and black holes in their centres and compose the results in a “movie of an exploding star.” As a spin-off, we obtain vital information for determining the distance to the host galaxy and the extragalactic distance scale. Also, we investigate the jets of energetic particles emanating from the active centers of superluminal radio galaxies and quasars. These jets have relativistic speeds, which appear on the sky to be faster than the speed of light. Our studies help to understand the physics of the immediate environment of the active centers, which are believed to be supermassive black holes.

I am a Board member of the International Steering Committee of the Russian-led space VLBI mission “RadioAstron.” The main part of the mission is a 10-m diameter radio telescope the larges telescope ever in space. It is in a highly eccentric around Earth with an apogee height of about 350,000 km. This mission extends the technique of VLBI into space providing a further improvement in the angular resolution power for observations of black hole environments and pulsars. We also use this mission is for an accurate measurement of the gravitational redshift, potentially the most accurate ever for testing the equivalence principle and general relativity.

I have been involved in the support of the US$ 750M space-borne GP- B) mission developed by NASA and Stanford University, whose goal was to monitor the - 3 - - Norbert Bartel Curriculum Vitae precessions of on-board gyroscopes with respect to a bright guide star to test two predictions of general relativity, the geodesic effect and frame dragging. The former is caused by the bending of space-time due to a massive body like the Earth and the latter is caused by the warping of space-time due to the rotation of a massive body like the Earth around its axis. Frame dragging could be fundamentally responsible for the physical phenomena near supermassive black holes seen in the most powerful sources of the universe, quasars and other centers of active galactic nuclei. The experiment is considered to be the most difficult ever conducted in space. Together with I. Shapiro (Harvard-Smithsonian Center for Astrophysics) I was the Co-PI for the VLBI project to determined the of the GP-B guide star with respect to distant quasars. This determination was necessary for the experiment so that the precessions could be referred to the (quasi) inertial extragalactic reference frame and to the distant universe. The mission came to a successful conclusion in 2011. Frame dragging was confirmed to exist.

SCHOLARLY AND PROFESSIONAL ACTIVITIES:

UNIVERSITY SERVICE:

Department of Physics and Astronomy

1993 Seminar series organizer

1993-- Member and/or chair of various committees, such as curriculum committee, tenure and promotion committee, search committee for a new chair of the department, recruitment and retention committee, occasionally Acting Chair

1995-2005 Coordinator of the Space and Communication Sciences (SCS) Programme

1995-2005 Executive Committee

Faculty of Science:

1994-- Member of one Committee per

1995-2002 Faculty Advisor for the SEDS club (Students for the Exploration and - 4 - - Norbert Bartel Curriculum Vitae

Development of Space)

1995-1998 Design and construction of an antenna lab for satellite communications and ham radio.

NATIONAL AND INTERNATIONAL RESPONSIBILITIES:

1980 IAU Symposium No. 95, Pulsars, member of Local Organizing Committee

1984 Workshop, Supernovae as Distance Indicators, organizer and co-chair

1987 IAU Symposium No. 129, The Impact of VLBI on Astrophysics and Geophysics, member of the Local Organizing Committee

1989 Advisory activity for the DLR (German Aerospace Research Establishment), Division of Radio Frequency Technology

1990-- Member of the Science Objective Group (SOC) of the Soviet space VLBI project RADIOASTRON

1990 Representative of NASA at the conference on "Propagation Effects in Space VLBI,” Leningrad, USSR, May 28-30

1992-- Member of the Special Study Group 2.109 of the International Association of Geodesy, "Application of Space VLBI in the Field of Astrometry and Geodynamics"

1992-2001 Member of the Managing Group for the Algonquin Space Complex (formerly Algonquin Radio Observatory)

1997-2000 Member of the Radio Astronomy Subcommittee of the Canadian Astronomical Society (CASCA)

1997-2001 Member of the CASCA Space Astronomy Committee (JSSA)

1997-2000 Chair, CASCA Radio Astronomy Committee

1998--2005 Member of the VSOP (Space VLBI) Science Review Committee

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2002--2005 Member of the Square-Kilometer-Array (SKA) Steering Committee in Canada

2002-2005 Member of the John Charles Polanyi Prizes Selection Committee

2004-2005 CAP Lecturer (CAP:Canadian Association of Physicists), invited speaker at Canadian Universities, topic: Testing Einstein’s Universe

2005-- 2012 Chair, Canadian Square-Kilometer-Array (SKA) Science Advisory Committee

2005--2014 Board member of the Canadian Square-Kilometer-Array (SKA) Consortium

2008-- Member of International Steering Committee for the Russian-led spacecraft mission RadioAstron

2010--2014 Member, Australian-led VLBI ASKAP SKA pathfinder survey project

2012-- Co-Chair, Gravity Working Group of the RadioAstron mission

2015-- Member, ACURA Advisory Council on the SKA (AACS)

2015-- Associate member, SKA focus group -VLBI working group

SUPERVISORY ACTIVITIES

Senior Research Associate:

1993-- Michael Bietenholz (Ph.D.) York University (part-time), also Hartebeesthoek Radio Astronomical Observatory, South Africa (part-time position as research scientist). He worked on the guide star for the Gravity Probe B mission, and continues to work on VLBI research of pulsars, supernovae and the cores of radio galaxies and quasars. He is an independent research scientist and helps to supervise graduate students and visitors in my group. He is also computer system administrator of the group.

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Research Associate:

2004 Alexander Novikov York University Graduate of the Lebedev Physical Institute, Moscow, Russia He worked on the search of pulsed emission from SN 1986J using the S2 baseband recording system. He is now lab supervisor for engineering students at York.

Postdoctoral Fellows:

2003-- 2006 Ryan R. Ransom York University Graduate of York University, 2003 Research Area: VLBI Investigations of the guide star, IM Pegasi, of the Gravity Probe B mission.

2005 Vladislav Kondratiev York University Graduate of the Lebedev Physical Institute, Moscow, Russia He works on pulsar emission mechanisms and on the timing of pulsars using the Canadian S2 tape-based VLBI recording system and the MK5 disk-based VLBI recording system.

Visiting Scientist:

1994-1995 Alexandre Andrei (Ph.D.) York University Graduate of University of Cambridge, England, 1989 Head of the Astrolabe Group of the National Observatory, Rio de Janeiro, Brazil Research area: Radio and optical astrometric reference frames

Project Scientist - Consultant:

1994-1997 Rongshi Pan (Ph.D.) York University Graduate of Shanghai Observatory, 1981

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Associate Professor, Shanghai Observatory (till 1991) Project Scientist/Consultant Research area: General Relativity, astrometric reference frames, geophysics.

Assistant:

1997-2002 Adam Jeziak (B.Sc.) Graduate of York University, 1998 He worked on animation for the movie “Supernova: Death of a star” and for the movie “Gravity Probe B – Testing Einstein with Orbiting Gyroscopes”

Graduate student thesis supervision

1994-1996 Angelic Ebbers (M.Sc. student) York University She worked on VLBI Astrometry of the Compact Core of M81 with an Interactive Phase-Connection Software Package. Not finished because of attractive job opportunity. Now software engineer at company in Ottawa.

1995-1997 Barkat Sorathia (Ph.D. student) York University He worked on VLBI research of the Nuclear Jet in Cygnus A. Thesis: "Multifrequency-Synthesis Imaging of the Nuclear Jet in the Radio Galaxy Cygnus A,” not finished. Now Chairman and Managing Director of Barso Global Management Ltd.

1995- 1997 David Del Rizzo (M.Sc. student) York University/Dominion Radio Astrophysical Observatory He worked on VLBI research of pulsars (on part-time basis); thesis postponed. Now at DRAO, Penticton, Canada.

1995-1998 Ryan Ransom (M.Sc. student) York University, NSERC stipend recipient He worked on VLBI research of radio stars. Thesis: “VLBI Investigation of the Candidate Guide Stars of the

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NASA/Stanford Spaceborne Relativity Mission, Gravity Probe B,” (1997). Now professor at Okanagan College, Penticton, BC

1997-1998 Nelson Nunes (M.Sc. student) York University, NSERC stipend recipient He worked on VLBI research of pulsars and quasars; thesis not finished because of work on start-up company, now President and Co-Founder of ADBASE, Inc.

1998- 2003 Ryan Ransom (Ph.D. student) York University, NSERC stipend recipient He worked under my supervision on VLBI support for the NASA/Stanford Spaceborne Relativity Mission, Gravity Probe B. Thesis: “VLBI Imaging and Astrometry of the Gravity Probe B Guide Star HR 8703,’’ (2003). Now professor at Okanagan College, Penticton, BC.

2003--2006 Jerusha H. Lederman (M.Sc. student) York University She worked on VLBI support for the NASA/Stanford Spaceborne Relativity mission, Gravity Probe B. Thesis: “Structural Changes of the 3C454.3 used as an Extragalactic Reference Source for the Gravity probe B Mission,” (2006). Now Ph.D. student in CRESS, York University

2005--2007 Peter Luca (M.Sc. student) York University He worked on high-dynamic range mapping of the quasar 3C454.3 to search for the counter jet. Thesis: “High sensitivity VLBI study of the quasar 3C454.3.” (2007). Physics high school teacher.

2007-- Sasha (Alexandre) Novikov (Ph.D. part-time student, interrupted, likely finishing in 2016) York University Thesis: “Extremely compact sources in the Universe – giant pulses and the kinematics of the cores of quasars.” Now

2009--2013 Bahman Karimi (M.Sc.) York University Thesis: ”Investigation of Deconvolution Effects for SN 1993J using Simulations of a Spherical Shell Model.” Now tutor for physics students and lecturer at a College in Toronto.

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Graduate student project supervision

2014-2015 Keaven Moore York University Project title: “The influence of the ionosphere and the troposphere on the gravitational redshift experiment with the spacecraft RadioAstron”

Graduate student thesis co-supervision as member of supervisory committee (last 6 only)

2001-- 2009 Ryan Christoper (Ph.D.) York University Thesis: The Development and maintenance of AGN. (Supervisor, M. De Robertis)

2002- 2011 Robin Metcalfe (Ph.D.) York University Thesis: Probing the Uniformity of the Local Sheet Environment. (Supervisor: M. De Robertis)

2005- 2011 Xiaoyi Dong (Ph.D.) York University Thesis: Detect AGNs using multi-filter imaging data (2011). (Supervisor: M. De Robertis)

2007-2011 Jesse Rogerson (M.Sc.) York University Thesis: X-ray observations of two unusual BAL quasars. (Supervisor: P. Hall)

2007-2011 Jesse Rogerson (M.Sc.) York University Thesis: X-ray observations of two unusual BAL quasars. (Supervisor: P. Hall)

2009-2011 Stuart Dack (M.Sc.) York University Thesis: The chemical compositions and the evolution of galaxies.

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(Supervisor: M. McCall)

2011- Jesse Rogerson (Ph.D.) York University Thesis: Colour variability of quasars in Stripe 82. (Supervisor: P. Hall)

2011-2013 George Conidis (M.Sc.) York University Thesis: Galactic catalogue of massive member components of the local sheet. (Supervisor: M. McCall)

2013- 2015 Ryan Deneault (M.Sc.) York University Thesis: Warm-hot intergalactic gas in the local sheet. (Supervisor: M. McCall)

Undergraduate student project supervision:

2014-2014 Keaven Moore York University Project title: “Gravitational redshift observed from RadioAstron mission”

2015-2015 Natalee Galati York University Project title: “The optical and radio properties of SN 2011dh” She also worked on archiving of gravitational redshift data from the spacecraft RadiaAstron.

2015-2016 Brandon Parsons York University Project title: “The orbital evolution of the spacecraft RadioAstron”

Research Assistant supervision:

2015- Bahman Karimi York University Project title: “Analysis of errors in VLBI images of supernovae”

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UNDERGRADUATE COURSES:

Harvard University:

1983-1985 Galactic Astronomy: Course for about 10 graduate students. Guest lecturer for this course conducting sessions on specific subjects such as supernovae, supernova remnants, and pulsars.

1986-1987 The Astronomical Universe: Introductory course for about 150 students. I taught as "lecturer" tutorials for about 25 undergraduate students. Teaching included correction of weekly homework and quizzes and grading of mid-term and final exams and a term paper.

1988-1989 Matter in the Universe: More challenging alternative to the above course, also for about 150 students. Similar teaching responsibilities as for the year before.

York University:

1992-- PHYS 3250.03 W Introduction to Space Communications Course for about 15 to 20 students

2006- PHYS 4330.03 W Radio Science and Techniques for Space Exploration Course for about 12 students

2009- PHYS 1470.03 W Highlights of Astronomy Course for about 60 science students

2010- 2010 NATS 1740.06 Y Astronomy Course for about 500 non-science majors

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1993--2005 PHYS 4250.03 F Signal and Communications Theory Course for about 10 to 35 students

1994-1995 PHYS 4100.03 W Special Topics Supervised study for 1 student

1994--2005 NATS 1740.06 Y Astronomy Course for about 500 non-science majors

1994--2005 PHYS 4001.06 Y Space and Communication Sciences Workshop Interdisciplinary course for about 15 students (Supervisor for individual students and/or director of course)

1995-2002 PHYS 3001.01 W Organization and Management Seminar in Space and Communication Sciences Interdisciplinary course for about 15 students (Organizer for the Physics and Astronomy Department, Director in 2002)

1995-- 2004 PHYS 4450.03 W Spacecraft Systems Interdisciplinary course for about 8 students given at several universities simultaneously (Local coordinator)

2004--2005 PHYS 4060.03 W Time Series and Spectral Analysis (cross-listed with PHYS 4250.03) Course for about 35 students

2004--2005 ESSE 4020.03 W Time Series and Spectral Analysis (cross-listed with PHYS 4250.03) Course for about 35 students

2004--2005 MATH 4830.03 W Time Series and Spectral Analysis

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(cross-listed with PHYS 4250.03) Course for about 35 students

2006- 2009 PHYS 1070.03 W Astronomy Course for about 60 students

Note: Sabbatical year in 2000-2001, no courses. Sabbatical year in 2005-2006, no courses. Sabbatical year in 2012-2013, no courses.

GRADUATE COURSES:

1995-1998 PHYS 5490.03 F Astronomical Research Supervised study for 1 student per year

1997- PHYS 6190.03 W Radio Interferometry Course for about 3 students

2004--2005 ESSE 5020.03 W Time Series and Spectral Analysis (cross-listed with PHYS 4250.03) Course for about 5 students

2013- PHYS 6210.01 F Supernovae, Neutron Stars and Black Holes Course for about 3 students

2014- PHYS 6211.01 F The Universe at Radio Wavelengths Course for about 3 students

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GRANTS AND CONTRACTS:

1992 York University - Special Research Fund N. Bartel $90,000

1992 York University - Generic Research Fund N. Bartel $1,025

1993-1995 NSERC Research Operating Grant N. Bartel $35,000/year

1993 NSERC Equipment Grant N. Bartel $11,931

1993 York University - Generic Research Fund N. Bartel $1,025

1993 York University – President’s NSERC N. Bartel $5,000 Fund

1994 York University Generic Research Fund N. Bartel $1,000

1994 York University - Special Research Fund N. Bartel $27,000

1994 York University – President’s NSERC N. Bartel $2,000 Fund

1995 York University - Generic Research Grant N. Bartel $900

1995 York University – President’s NSERC N. Bartel $1,000 Fund

1995 NSERC Equipment grant N. Bartel, M. De $30,000 Robertis, M. McCall, J. Laframboise

1994-1997 Harvard-SAO/Stanford Contract for VLBI N. Bartel $304,940 US support of Gravity Probe B

1996-1999 NSERC Research Operating Grant N. Bartel $40,000 /year 1998-1999 Harvard-SAO/Stanford Contractor VLBI N. Bartel $299,410 US support of Gravity Probe B 1998-2000 Australian Research Council Large Grant L. Ball, A. Beasley $178,000 Support (for Supernova research) M. Rupen, N. Bartel

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2000-2001 Harvard-SAO/Stanford Contract N. Bartel $367,380 US

2000-2004 NSERC Research Operating Grant N. Bartel $31,000/year

2002-2003 Harvard-SAO/Stanford Contract N. Bartel $382,980 US

2004-2006 Harvard-SAO/Stanford Contract N. Bartel $634,190 US

2005-2009 NSERC Research Operating Grant N. Bartel $32,900/year

2011-2015 NSERC Research Operating Grant N. Bartel $22,000/year

2012-2013 YUFA Sabbatical Leave Fellowship N. Bartel $12,482

Total Harvard –SAO/Stanford Contract (incl. 68% overhead) $1,988,900 US Total NSERC Research operating grant: $ 694,500 Total from other grants and funds: $ 361,363

Faculty of Science MERIT AWARDS

Three $2000 awards.

PUBLICATIONS:

SUMMARY: Books 1 Films 5 Papers in Refereed Journals (one submitted) 113 First Author in Papers in Refereed Journals 33 Papers in Nature (with one submitted) 8 First Author in Papers in Nature 5 Papers in Science 2 First author in Papers in Science 1 First Author in Inv. Rev. for Special Issue 1 - 16 - - Norbert Bartel Curriculum Vitae

Memoranda 2 Papers in Conference Proceedings 67 IAU Circulars and Telegrams 7

ORAL PRESENTATIONS:

About five oral presentations at universities, workshops and symposia per year, about three of them invited.

BOOK:

1. Bartel, N. (ed.), 1985. Proceedings of a workshop at the Harvard-Smithsonian Center for Astrophysics, 27-28 September 1984, Supernovae as Distance Indicators, Lecture Notes in Physics, No. 224 (Springer Verlag, Berlin, Heidelberg, New York, Tokyo), 226 pages

FILMS:

1. Bartel, N. and Bietenholz, M.F. 1997. “Supernova: Death of a Star,” 3.5 min. First version.

2. Bartel, N., 2000. “Gravity Probe B, Testing Einstein with Orbiting Gyroscopes,” fully animated, 16min, for educational purposes. First version.

3. Bartel, N., 2004. “Supernova: Death of a Star,” second version, fully animated, narrated, 16min, for educational purposes. DVD sold through York Bookstore, e- Commerce.

4. Bartel, N., 2004. “Testing Einstein’s Universe,” animated, narrated, live interviews, 26min, for educational purposes.

5. Bartel, N. 2004. "Extra Information" for the film Testing Einstein's Universe 13 topics: Newton's Gravity, Maxwell's Electromagnetism, Atoms, Nuclei, and Quarks, Quantum Mechanics,

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Special Relativity, General Relativity, Hope for Unification, Spacetime, Previous Test of General Relativity, Quasars, Guide Star for Gravity Probe B, Very-Long-Baseline Interferometry Gravity Probe B in a Nutshell

Animated, narrated, live interviews with York Physics and Astronomy Professors, 80min, for educational purposes. On DVD together with "Testing Einstein's Universe," sold through York bookstore and e-commerce.

PAPERS IN REFEREED JOURNALS:

1. Bartel, N., Sieber W. and Wielebinski, R., 1977. “Detection of Two Pulsars at 22.7 GHz,” Astr. Ap. 55, 319-320.

2. Bartel, N., 1978. “Direct Observation of Pulsar Microstructure at Timescales Down to 6 :s,” Astr. Ap. 62, 393-396.

3. Bartel, N., Sieber, W. and Wielebinski, R., 1978. “Observations of Pulsars at 14.8 and 22.7 GHz,” Astr. Ap. 68, 361-365.

4. Bartel, N., and Sieber, W., 1978. “Simultaneous Single Pulse Observations of Radio Pulsars at Two Widely Spaced Frequencies,” Astr. Ap. 70, 307-310.

5. Morris, D., Sieber, W., Ferguson, D.C. and Bartel, N., 1980. “Changes in the Average Pulse Shape of PSR 0355+54 at 11 cm Wavelength,” Astr. Ap. 84, 260-262.

6. Bartel, N., Sieber, W. and Graham, D.A., 1980. “The Millisecond Intensity Variation in the Emission of Radio Pulsars,” Astr. Ap. 87, 282-291.

7. Bartel, N., Sieber, W. and Wolszczan, A., 1981. “Pulse to Pulse Intensity Molulation from Radio Pulsars with Particular Concern of its Frequency Dependence,” Astr. Ap. 90, 58-64.

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8. Bartel, N., Sieber, W., Wielebinski, R., Kardashev, N.S., Nikolajev, N.Ya., Popov, M.V., Soglasnov, V.A., Kuzmin, A.S. and Smirnova, T.V., 1981. “Simultaneous Two Station Single Pulse Observations of Radio Pulsars Over a Broad Frequency Range. I. With Particular Reference to PSR 0809+74,” Astr. Ap. 93, 85-92.

9. Bartel, N., 1981. “Evidence for Ultra Broad Band Absorption of Radio Emission in the Pulsar Magnetosphere,” Astr. Ap. 97, 384-387.

10. Wolszczan, A., Bartel, N. and Sieber, W., 1981. “Frequency Dependence of the P2 and P3 Periods in Four Pulsars,” Astr. Ap. 100, 91-96.

11. Morris, D., Graham, D.A. and Bartel, N., 1981. “A Mode Change in the Radio Emission from the Pulsar PSR 1822-09,” M.N.R.A.S. 194, 7-11.

12. Wolszczan, A., Bartel, N. and Sieber, W., 1981. “Spectrum of the Interstellar Plasma Turbulence in the Direction of the Pulsar PSR 0329+54,” M.N.R.A.S. 196, 473-480.

13. Morris, D., Graham, D.A., Sieber, W., Bartel, N. and Thomasson, P., 1982. “Observations of the Polarization of Average Pulsar Profiles at High Frequency,” Astr. Ap. (Supp.) 46, 421-472.

14. Matveenko, L.I., Kostenko, V.I., Papatsenko, A.Kh., Bartel, N., Massi, M., Romney, J.D., Weiler, K.W., Ficarra, A., Mantovani, F., Padrielli, L., Moiseev, I.G., Baath, L. and Nicolson, G.D., 1981. “Long Baseline Interferometry of Compact Radio Sources at 18 cm,” Pis'ma Astron. Zh. 7, 470-478, translated in Soviet Astron. Letters 7, 259-263.

15. Matveenko, L.I., Kostenko, V.I., Moiseev, I.G., Romney, J.D., Bartel, N., Padrielli, L., Ficarra, A. and Mantovani, F., 1982. “The Fine Structure of 3C84 and 3C345 at 18-cm Wavelength,” Pis'ma Astron. Zh. 8, 148-152, translated in Soviet Astron. Letters 8, 77-79.

16. Bartel, N. and Hankins, T.H., 1982. “100 Nanosecond Time Resolution Observations of PSR 1133+16,” Astrophys. J. (Lett.), 254, L35-L39.

17. Bartel, N., Morris, D., Sieber, W. and Hankins, T.H., 1982. “The Mode Switching Phenomenon in Pulsars,” Astrophys. J. 258, 776.

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18. Kardashev, N.S., Nikolajev, N.Ya., Novikov, A.Yu., Popov, M.V., Soglasnov, V.A.,Kuzmin, A.D. , Smirnova, T.V., Bartel, N., Sieber, W. and Wielebinski, R., 1982. “PSR 1133+16: Determination of the Dispersion Measure and the Locations of the Emitting Regions,” Astr. Ap. 109, 340.

19. Bartel, N., Shapiro, I.I., Corey, B.E., Marcaide, J.M., Rogers, A.E.E., Whitney, A.R., Cappallo, R.J., Graham, D.A., Romney, J.D. and Preston, R.A., 1982. “Nucleus of M81: Simultaneous 2.3 and 8.3 GHz Mark III VLBI Observations,” Astrophys J. 262, 556-563.

20. Bartel, N., Shapiro, I.I., Huchra, J.P. and Kühr, H., 1984. “The Compact Radio Source 2021+614: A Peculiar Narrow-Line Radio Galaxy,” Astrophys. J. 279, 112-114.

21. Bartel, N., Shapiro, I.I., Corey, B.E., Marcaide, J.M., Rogers, A.E.E., Whitney, A.R., Cappallo, R.J., Kühr, H., Graham, D.A. and Baath, L.B., 1984. “The Compact Radio Source 2021+614: Simultaneous 2.3 and 8.3 GHz Mark III VLBI Observations,” Astrophys. J. 279, 116-121.

22. Romney, J., Padrielli, L., Bartel, N., Weiler, K.W., Ficarra, A., Mantovani, F., Baath, L.B., Kogan, L., Matveenko, L., Moiseev, I.G. and Nicolson, G., 1984. “The Millisecond Structure of Low Frequency Variable Sources,” Astr. Ap. 135, 289-299.

23. Bartel, N., Ratner, M.I., Shapiro, I.I., Cappallo, R.J., Rogers, A.E.E. and Whitney, A.R., 1985. “Pulsar Astrometry via VLBI,” Astron. J. 90, 318-325.

24. Marcaide, J.M., Shapiro, I.I., Corey, B.E., Cotton, W.D., Gorenstein, M.V., Rogers, A.E.E., Romney, J.D., Schild, R., Baath, L., Bartel, N., Cohen, N.L., Clark, T.A., Preston, R.A., Ratner, M.I. and Whitney, A.R., 1985. The Quasars 1038+528 A and B,” Astr. Ap. 142, 71-84.

25. Marcaide, J.M., Bartel, N., Gorenstein, M.V., Shapiro, I.I., Corey, B.E., Rogers, A.E.E., Webber, J.C., Clark, T.A., Romney, J.D. and Preston, R.A., 1985. “The Quasar 4C39.25 is not Contracting,” Nature 314, 424-424.

26. Biermann, P., Strom, R. and Bartel, N., 1985. “NGC 6212: An Elliptical Galaxy with a Highly Active Nucleus,” Astr. Ap. (Lett.) 147, L27-L28.

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27. Bartel, N., Ratner, M.I., Shapiro, I.I., Cappallo, R.J., Rogers, A.E.E. and Whitney, A.R., 1985. “Investigation of Radiation from Pulsar PSR 0329+54 Using Mark III VLBI Observations,” Astron. J. 90, 2532-2539.

28. Bartel, N., Rogers, A.E.E., Shapiro, I.I., Gwinn, C.R., Marcaide, J.M. and Weiler, K.W., 1985. ”Hubble's Constant Determined Using Very-Long-Baseline Interferometry of a Super-nova,” Nature 318, 25-30.

29. Bartel, N., Herring, T.A., Ratner, M.I., Shapiro, I.I. and Corey, B.E., 1986. “VLBI Limits on the Proper Motion of the `Core' of the Superluminal Quasar 3C345,” Nature 319, 733-738.

30. Kühr, H., Stocke, J., Strittmatter, P.A., Bartel, N., Eckart, A., Schalinski, C., Witzel, A. and Biermann, P., 1986. “High-Resolution Radio Observations of the Most Luminous Quasar,” Astrophys. J. 302, 52-55.

31. Padrielli, L., Romney, J.D., Bartel, N., Fanti, R., Ficarra, A., Mantovani, F., Matveenko, L., Nicolson, G.D. and Weiler, K.W., 1986. “Two VLBI Observations of a Sample of Low Frequency Variable Sources,” Astr. Ap. 165, 53-73.

32. Marscher, A.P., Broderick, J.J., Padrielli, L., Bartel, N. and Romney, J.D., 1987. “18-cm VLBI Observations of the Quasar NRAO 140 during and after a Low-Frequency Outburst,” Astrophys. J. 319, 456-464.

33. Bartel, N., Ratner, M.I. Rogers, A.E.E., Shapiro, I.I., Bonometti, R.J., Cohen, N.L., Gorenstein, M.V., Marcaide, J.M. and Preston, R.A., 1987. “VLBI Observations of 23 Hot Spots in the Starburst Galaxy M82,” Astrophys. J. 323, 505-515.

34. Bartel, N., Dhawan, V., Krichbaum, T., Graham, D.A., Pauliny-Toth, I.I.K., Rogers, A.E.E., Rönnäng, B.O., Spencer, J.H., Hirabayashi, H., Inoue, M., Lawrence, C.R., Shapiro, I.I., Burke, B.F., Marcaide, J.M., Johnston, K.J., Booth, R.S., Witzel, A., Morimoto, M. and Readhead, A.C.S., 1988. “VLBI Imagining with an Angular Resolution of 100 Microarcseconds,” Nature 334, 131-135.

35. Jauncey, D.L., Kemball, A., Bartel, N., Whitney, A.R., Rogers, A.E.E., Shapiro, I.I.,Preston, R.A., Clark, T.A., Harvey, B.R., Jones, D.L., Nicolson, G.D., Nothnagel, A., Phillips, R.B., Reynolds, J.E., and Webber, J.C., 1988. “Supernova 1987A: Radiosphere Resolved with VLBI Five Days After the Neutrino Burst,” Nature 334, 412-415.

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36. Gwinn, C.R., Cordes, J.M., Bartel, N., Wolszczan, A. and Mutel, R.L., 1988. “VLBI Observations of a Pulsar's Scattering Disk,” Astrophys. J. (Lett.) 334, L13-L16.

37. Gorenstein, M.V., Cohen, N.L., Shapiro, I.I., Rogers, A.E.E., Bonometti, R.J., Falco, E.E., Bartel, N. and Marcaide, J.M., 1988. “VLBI Observations of the Gravitational Lens System 0957+561: Structure and Relative Magnification of the A and B Images,” Astrophys. J. 334, 42-58.

38. Bartel, N., Shapiro, I.I. and Rupen, M.R. ,1989. “VLBI Observations of SN1986J: A Supernova with an Elongated Radio Brightness Distribution,” Astrophys. J. (Lett.) 337, L85-L88.

39. Dhawan, V., Bartel, N., Rogers, A.E.E., Rönnäng, B.O., Hirabayashi, H., Inoue, M., Lawrence, C.R., Burke, B.F., Shapiro, I.I., Booth, R.S., Readhead, A.C.S., Morimoto, M., Johnston, K.J., Spencer, J.H., and Marcaide, J.M., 1990. “Further 7-mm VLBI Observations of 3C84 and other Sources with 100 Fas Resolution,” Astrophys. J. (Lett.) 360, L43-L46.

40. Krichbaum, T.P., Booth, R.S., Kus, A.J., Rönnäng, B.O., Witzel, A., Graham, D.A., Pauliny-Toth, I.I.K., Quirrenbach, A., Hummel, C.A., Alberdi, A., Zensus, J.A., Johnston, K.J, Spencer, J.H., Rogers, A.E.E., Lawrence, C.R., Readhead, A.C.S., Hirabayashi, H., Inoue, M., Morimoto, M., Dhawan, V., Bartel, N., Shapiro, I.I., Burke, B.F., and Marcaide, J.M., 1990. “43 GHz-VLBI Observations of 3C273 after a Flux Density Outburst in 1988,” Astr. Ap. 237, 3-11.

41. Bartel, N., Rupen, M.P., Shapiro, I.I., Preston, R.A., and Rius, A., 1991. “A High-Resolution Radio Image of a Young Supernova,” Nature 350, 212-214.

42. Carilli, C.L., Bartel, N., and Linfield, R.P., 1991. ,”VLBI Observations of the Nuclear Jet in Cygnus A,” Astron. J. 102, 1691-1695.

43. Harvey, B.R., Jauncey, D.L., White, G.L., Nothnagel, A., Nicolson, G.D., Reynolds, J.E., Morabito, D.D., and Bartel, N., 1992. “Accurate Radio and Optical Positions for Southern Radio Sources,” Astron. J. 103, 229-233.

44. Marcaide, J.M., Alberdi, A., Bartel, N., Clark, T.A., Corey, B.E., Elosegui, P., Gorenstein, M.V., Guirado, J.C., Kardashev, N., Popov, M., Preston, R., Ratner, M.I., Rioja, M.J., Rogers, A.E.E., and Shapiro, I.I., 1992. “Position and

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Morphology of the Compact Non-Thermal Radio Source at the Galactic Center,” Astron. Astrophys. 258, 295-301.

45. Krichbaum, T.P., Witzel, A., Graham, D.A., Alef, W., Pauliny-Toth, I.I.K., Hummel, C.A., Quirrenbach, A., Inoue, M., Hirabayashi, H., Morimoto, M., Rogers, A.E.E., Zensus, J.A., Lawrence, C.R., Readhead, A.C.S., Booth, R.S., Rönnäng, B.O., Kus, A.J.,Johnston, K.J., Spencer, J.H., Burke, B.F., Dhawan,V., Bartel, N., Shapiro, I.I., Alberdi, A., and Marcaide, J.M., 1992. “The Evolution of the Sub- Structure of 3C84 at 43 GHz,” Astr. Ap. 260, 33-48.

46. Gwinn, C.R., Bartel, N., and Cordes, J.M., 1993. “Angular Broadening of Pulsars and the Distribution of Interstellar Plasma Fluctuations,” Astrophys. J. 40, 673- 685.

47. Alberdi, A., Krichbaum, T.P., Marcaide, J.M., Witzel, A., Graham, D.A., Inoue, M., Morimoto, M., Booth, R.S., Rönnäng, B.O., Colomer, C.R., Rogers, A.E.E., Zensus, J.A., Readhead, A.C.S., Lawrence, C.R.,Bartel, N., Shapiro, I.I., and Burke, B.F., 1993. “First 8 = 7mm VLBI Observations of the Peculiar Superluminal Radio Source 4C39.25," Astr.Ap. 271, 93-100.

48. Krichbaum, T.P., Zensus, J.A., Witzel, A., Mezger, P.G., Standke, K.J., Schalinski, C.J., Alberdi, A., Marcaide, J.M., Zylka, R., Rogers, A.E.E., Booth, R.S., Rönnäng, B.O., Colomer, F., Bartel, N., and Shapiro, I.I., 1993. “First 43GHz VLBI Detection of the Compact Source Sgr A* in the Galactic Center,” Astr. Ap. 274, L37-L40.

49. Bartel, N., Bietenholz, M.F., Rupen, M.P., Conway, J.E., Beasley, A.J., Sramek, R.A., Romney, J.D., Titus, M.A., Graham D.A., Altunin, V.I., Jones, D.L., Rius, A., Venturi, T., Umana, G., Francis, R.L., McCall, M.L., Richer, M.G., Stevenson, C.C., Weiler, K.W., Van Dyk, S.D., Panagia, N., Cannon, W.H., Popelar, J., and R.J. Davis, 1994. “The Shape, Expansion Rate and Distance of Supernova 1993J from VLBI Measurements,” Nature 368, 610-613.

50. Carilli, C.L., Bartel, N., and Diamond, P., 1994. ”Second Epoch VLBI Observations of the Nuclear Jet in Cygnus A: Subluminal Jet Proper Motion Measured,” Astron J. 108, 64-75.

51. Bartel, N., Sorathia, B., Bietenholz, M.F., Carilli, C.L., and Diamond, P., 1995. “The Nuclear Jet and Counterjet Region of the Radio Galaxy Cygnus A,” Proc. Natl. Acad. Sci. 92, 11371-11373.

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52. Bartel, N., Bietenholz, M.F. and Rupen, M.P., 1995. “The Nuclear Region of the Spiral Galaxy M81," Natl. Acad. Sci. 92, 11374-11376.

53. Bartel, N., Chandler, J.F., Ratner, M.I., Shapiro, I.I., Pan, R., and Cappallo, R.J., 1996. “Toward a Frame Tie Via Millisecond Pulsar VLBI,” Astron. J. 112, 1690- 1696.

54. Bietenholz, M. F., Bartel, N., Rupen, M.P., Conway, J.E., Beasley, A.J., Sramek, R.A., Romney, J.D., Titus, M.A., Graham, D.A., Altunin, V.I., Jones, D.L., Rius, A., Venturi, T., Umana, G., Weiler, K.W., Van Dyk, S.D., Panagia, N., Cannon, W.H., Popelar, J., and Davis, R.J. 1996. “VLBI Observations of the Ultracompact Radio Nucleus of the Galaxy M81," Astrophys. J. 457, 604-609.

55. Campbell, R.M., Bartel, N., Shapiro, I.I., Ratner, M.I., Cappallo, R.J., Whitney, A.R., and Putnam, N., 1996. “VLBI-derived Trigonometric Parallax and Proper Motion of PSR B2021+51," Astrophys. J. (Lett.) 461, L95.

56. Tateyama, C.E., Inoue, M., Krichbaum, T.P., Baath, L.B., Kameno, S., Rogers, A.E.E., Alberdi, A., Backer, D.C., Bartel, N., Booth, R.S., Burke, B.R., Carlstrom, J.E., Dhawan, V., Dickman, R.L., Emerson, D.T., Hirabayashi, H., Hodges, M.W., Graham, D.A., Johnson, K.J., Kobayashi, H., Kus, A.J., Padin, S., Plambeck, R.L., Predmore, C.R., Quirrenbach, A., Lawrence, C.R., Lamb, J., Marcaide, J.M., Morimoto, M., Ronnang, B.O., Shapiro, I.I., Spencer, J.H., Witzel, A., Woody, D., and Wright, M.C.H., 1996. “Global 3- and 7-mm VLBI Observations of OJ 287," Publ. Astron. Soc. Japan 48, 37-44.

57. Bondi, M., Padrielli, L., Fanti, R., Ficarra, A., Gregorini, L., Mantovani, F., Bartel, N., Romney, J.D., Nicolson, G.D., and Weiler, K.W., 1996. “Three Epoch VLBI Observations at 18 cm of Low Frequency Variable Sources,” Astr. Ap. 308, 415- 427.

58. Bouchy, F., Lestrade, J.-F., Ransom, R. R., Bartel, N., Ratner, M. I. and Shapiro, I. I. 1998. “Possible superluminal motion between two stationary components in the high-redshift quasar 1338+381.” Astr. Ap. 335, 145-151.

59. Wietfeld, R., Van Straten, W., Del Rizzo, D., Bartel, N., Cannon, W. and Novikov, A., 1998. ”The S2 Baseband Processing System for Phase-Coherent Pulsar Applications,” Astr. Ap. Suppl. 131, 549-554.

60. Lebach, D.E., Ratner, M.I., Shaprio, I.I., Ransom, R.R., Bietenholz, M.F., Bartel, N., and Lestrade, J.-F., 1999. “Milliarcsecond Change of IM Pegasi Radio

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Position in 1 Hour Coincident with Sharp Rise in Flux Density,” Astrophys. J. (lett.) 517, 43-46.

61. Bartel, N., Bietenholz, M.F., Rupen, M.P., Beasley, A.J., Graham, D.A., Altunin, V.I., Venturi, T., Umana, G., Cannon, W.H., and Conway, J.E, 2000. “The changing morphology and increasing deceleration of supernova 1993J in M81,” Science 287, 112-116. 62. Bietenholz, M.F., Bartel, N., and Rupen, M.P., 2000. “A Stationary Core with a One-sided Jet in the Center of M81,” Astrophys. J. 532, 895-908.

63. Bietenholz, M.F., Bartel, N., and Rupen, M.P., 2001. “SN 1993J VLBI. I. The Center of Explosion and a Limit on Anisotropic Expansion,” Astrophys. J. 557, 770-781.

64. Popov, M. V., Bartel, N., Cannon, W. H., Novikov, A. Yu., Kondratiev, V. I., and Altunin, V. I, 2002. "Microstructure of Pulsar Radio Pulses Measured with a Time Resolution of 62.5 ns at 1650 MHz," Astronomy Reports, 46, 206-215.

65. Ransom, R. R., Bartel, N., Bietenholz, M. F., Lebach, D. E., Ratner, M. I., Shapiro, I. I., and Lestrade, J.-F., 2002. “"Possible Corotation of the Milliarcsecond Radio Structure of the Close Binary HR 1099," Astrophys. J. 572, 487-502.

66. Bietenholz, M.F. and Bartel. N., 2002. “SN 1986J VLBI. The Evolution and Deceleration of the Complex Source and a Search for a Pulsar Nebula,” Astrophys. J. 581, 1132-1147.

67. Bartel, N., Bietenholz, M.F., Rupen, M.P., Beasley, A.J., Graham, D.A., Altunin, V.I., Venturi, T., Umana, G., Cannon, W.H., and Conway, J.E., 2002. “SN 1993J VLBI. II. Related Changes of the Decleration, Flux-Density Decay, and Spectrum,” Astrophys. J. 581, 404-426.

68. Popov, M. V., Bartel, N., Cannon, W. H., Novikov, A. Yu., Kondratiev, V. I., and Altunin, V. I, 2002. " Pulsar Microstructure and its Quasi-periodicities with the S2 VLBI System at a Resolution of 62.5 Nanoseconds," Astr. Ap. 396, 171-187.

69. Ransom, R. R., Bartel, N., Bietenholz, M. F., Ratner, M. I., Lebach, D. E., Shapiro, I. I., and Lestrade, J.-F., 2002. “Very Long Baseline Interferometry Imaging of the RS Canum Venaticorum System HR 5110," Astrophys. J. 587, 390-397.

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70. Bartel, N. and Bietenholz, M. F., 2002. “SN 1979C VLBI: 22 Years of Almost Free Expansion," Astrophys. J. 591, 301-315.

71. Bietenholz, M.F., Bartel, N., and Rupen, M.P., 2003. “SN 1993J VLBI. III. The Evolution of the Radio Shell,” Astrophys. J. 597, 374-398.

72. Bietenholz, M.F., Bartel, N., and Rupen, M.P., 2004. “Discovery of a Compact Radio Component in the Center of Supernova,” Science. 304, 1947-1949.

73. Bietenholz, M.F., Bartel, N., and Rupen, M.P., 2004. “The Location of the Core in M81,” Astrophys. J. 615, 173-180.

74. Bietenholz, M.F., Hester, J.J., Frail, D.A., and Bartel, N., 2004. “The Crab Nebula’s Wisps in Radio and Optical,” Astrophys. J. 615, 794-804.

75. Soglasnov, V.A., Popov, M.V., Bartel, N., Cannon, W., Novikov, A. Yu, Kondratiev, V.I., and Altunin, V.I., 2004. “Giant Pulses from PSR B1937+21 with 39 Widths ≤ 15 Nanoseconds and Tb ≥ 5 x 10 k, the Highest Brightness Temperature Observed in the Universe,” Astrophys. J. 616, 439-451.

76. Bietenholz, M.F., Bartel, N., and Rupen, M.P., 2005. “ The history of AN 1986J and the emergence of a new component in its center.” Adv. In Sp. Res. 35, 1052- 1056.

77. Bartel, N., Bietenholz, M.F., and Rupen, M.P., 2005. “A VLBI search for pulsar wind nebulae.” Adv. In Sp. Res. 35, 1057-1061.

78. Bietenholz, M.F. and Bartel, N., 2005. “An Upper Limit on the Expansion Velocity of Gamma-Ray Burst Candidate SN 2001em.” Astrophys. J. 625, L99-L102.

79. Bietenholz, M.F. and Bartel, N., 2007. “SN2001em:No Jet-Driven Gamma-Ray Burst Event.” Astrophys. J. 665, L47-L50.

80. Bartel, N., Bietenholz, M. F., Rupen, M. P., Dwarkadas, V. V., 2007. “SN1993J VLBI. IV. A Geometric Distance to M81 with the Expanding Shock Front Method.” Astrophys. J. 668,924-940.

81. Kondratiev, V. I., Popov, M. V., Soglasnov, V. A., Kovalev, Y. Y., Bartel, N., Cannon, W., Novikov, A. Yu. 2007. “Probing cosmic plasma with giant radio pulses.” Astronomical and Astrophysical Transactions, 26, 585—595.

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82. Johnston, S., Bailes, M., Bartel, N., Baugh, C., Bietenholz, M., Blake, C. (+44 authors), 2007. “Science with the Australian Square Kilometre Array Pathfinder. ” Publications of the Astronomical Society of Australia.” 24, 174-188.

83. Bietenholz, M.F. and Bartel, N., 2008. “The evolution of the central component in SN1986J.” Adv. In Sp. Res. 41, 424-428.

84. Bietenholz, M. F. and Bartel, N., 2008. “The expansion and radio spectral index of G21.5-0.9: is PSR J1833-1034 the youngest pulsar?” MNRAS, 386, 1411- 1416.

85. Bauer, F. E., Dwarkadas, V. V., Brandt, W. N., Immler, S., Smartt, S., Bartel, N., Bietenholz, M. F. 2008. “Supernova 1996cr: SN 1987A's Wild Cousin?”, Astrophys. J. 688, 1210-1234.

86. Bartel, N. and Bietenholz, M. F. 2008. “Shell Revealed in SN 1979C.” Astrophys. J. 682, 1065-1069.

87. Johnston, S., Taylor, R., Bailes, M., Bartel, N., Baugh, C., Bietenholz, M., (+44 authors), 2008. “Science with ASKAP. The Australian square-kilometre-array pathfinder”, Experimental Astronomy 22, 151-273.

88. Bietenholz, M.F., Soderberg, A.M., Bartel, N. 2009, “Very-Long-Baseline Interferometry Observations of SN 2008D” Astrophys. J. 694, L6-L10.

89. Bietenholz, M. F., Bartel, N., Rupen, M. P. 2010, “Supernova 1986J Very Long Baseline Interferometry. II. The Evolution of the Shell and the Central Source” Astrophys. J. 712, 1057-1069.

90. Bietenholz, M. F.; Bartel, N.; Milisavljevic, D.; Fesen, R. A.; Challis, P.; Kirshner, R. P. 2010, “The first VLBI image of the young, oxygen-rich supernova remnant in NGC 4449” MNRAS 409, 1594 – 1600.

91. Bietenholz, M. F.; Soderberg, A. M.; Bartel, N.; Ellingsen, S. P.; Horiuchi, S.; Phillips, C. J.; Tzioumis, A. K.; Wieringa, M. H.; Chugai, N. N. 2010, “VLBI Observations of the Type Ib/c Supernova 2009bb” Astrophys. J. 725, 4-10.

92. Bietenholz, Michael F.; Matheson, Heather; Safi-Harb, Samar; Brogan, Crystal; Bartel, Norbert 2011, “The Deepest Radio Study of the Pulsar Wind Nebula G21.5-0.9: Still No Evidence for the Supernova Shell” MNRAS 412, 1221-1228.

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93. Bietenholz, M. F.; Brunthaler, A.; Soderberg, A. M.; Krauss, M.; Bartel, N.; Chomiuk, L.; Rupen, M. P. 2012 “VLBI Observations of the Nearby Type IIb Supernova 2011dh” Astrophys. J. 751, 125 – 131.

94. Shapiro, I. I., Bartel, N., Bietenholz, M. F., Lebach, D. E., Lestrade, J.-F., Ransom, R. R., Ratner, M. I., 2012, “VLBI for Gravity Probe B. I. “Overview” Astrophys. J. Suppl. 201,1.

95. Ransom, R. R., Bietenholz, M. F., Bartel, N., Lebach, Lederman, J. I., Luca, P., D. E., Ratner, M. I., Shapiro, I. I. 2012, “VLBI for Gravity Probe B. II. Monitoring of the Structure of the Reference Sources 3C 454.3, B2250+194, and B2252+172” Astrophys. J. Suppl. 201, 2.

96. Bartel, N., Bietenholz, M. F., Lebach, D. E., Lederman, J. I., Petrov, L., Ransom, R. R., Ratner, M. I., Shapiro, I. I. 2012, “VLBI for Gravity Probe B. III. A Limit on the Proper Motion of the ‘Core’ of the Quasar 3C 454.3” Astrophys. J. Suppl. 201, 3.

97. Lebach, D. E., Bietenholz, M. F., Bartel, N., Campbell, R. M., Gordon, D., Lederman, J. I., Lestrade, J.-F., Ransom, R. R., Ratner, M. I., Shapiro, I. I. 2012, “VLBI for Gravity Probe B. IV. A new Astrometric Analysis Technique and a Comparison with Results from other Techniques” Astrophys. J. Suppl. 201, 4.

98. Ratner, M. I., Bartel, N., Lebach, D. E., Lestrade, J.-F., Ransom, R. R., Shapiro, I. I. 2012, “VLBI for Gravity Probe B. V. “Proper Motion and Parallax of the Guide Star, IM Pegasi” Astrophys. J. Suppl. 201, 5.

99. Ransom, R. R., Bietenholz, M. F., Bartel, N., Lebach, D. E., Lestrade, J.-F., Ratner, M. I., Shapiro, I. I. 2012, “VLBI for Gravity Probe B. VI. The Orbit of IM Pegasi and the Location of the Source of Radio Emission” Astrophys. J. Suppl. 201, 6.

100. Bietenholz, M. F., Bartel, N., Lebach, D. E., Ransom, R. R., Ratner, M. I., Shapiro, I. I. 2012, “VLBI for Gravity Probe B. VII. The Evolution of the Radio Structure of IM Pegasi” Astrophys. J. Suppl. 201, 7.

101. Milisavljevic, D., Margutti, R., Soderberg, A. M., Pignata, G., Chomiuk, L., Fesen, R., Bufano, F., Sanders, N. E., Parrent, J. T., Parker, S., Mazzali, P., Pian, E., Pickering, T., Buckley, D., Crawford, S., Gulbis, A. A. M., Hettlage, C. Hooper, E., Nordsieck, K.. O'Donoghue, D.. Husser, T.-O., Potter, S., Kniazev, A.,Kotze, P.,

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Romero-Colmenero, E., Vaisanen, P., Wolf, M., Bietenholz, M., Bartel, N., Fransson, C., Walker, E. S., Brunthaler, A. Chakraborti, S., Levesque, E. M., MacFadyen, A., Drescher, C., Bock, G., Marples, P., Anderson, J. P., Benetti, S.,Reichart, D., Ivarsen, K. 2013, "Multi-Wavelength Observations of Supernova 2011ei: Time-Dependent Classification of Type IIb and Ib Supernovae and Implications for their Progenitors" Astrophys. J., 767, 71.

102. Zhuravlev, V. I., Popov, M. V., Soglasnov, V. A., Kondrat'ev, V. I., Kovalev, Y. Y., Bartel, N., Ghigo, F. 2013, “Statistical and polarization properties of giant pulses of the millisecond pulsar B1937+21” MNRAS, 430, 2815.

103. Kardashev, N. S.; Khartov, V. V.; Abramov, V. V.; Avdeev, V. Yu.; Alakoz, A. V.; Aleksandrov, Yu. A.; Ananthakrishnan, S.; Andreyanov, V. V.; Andrianov, A. S.; Antonov, N. M.; Artyukhov, M. I.; Arkhipov, M. Yu.; Baan, W.; Babakin, N. G.; Babyshkin, V. E.; Bartel', N.; Belousov, K. G.; Belyaev, A. A.; Berulis, J. J.; Burke, B. F.; Biryukov, A. V.; Bubnov, A. E.; Burgin, M. S.; Busca, G.; Bykadorov, A. A.; Bychkova, V. S.; Vasil'kov, V. I.; Wellington, K. J.; Vinogradov, I. S.; Wietfeldt, R.; Voitsik, P. A.; Gvamichava, A. S.; Girin, I. A.; Gurvits, L. I.; Dagkesamanskii, R. D.; D'Addario, L.; Giovannini, G.; Jauncey,D.L.; Dewdney,P.E.; D'yakov,A.A.; Zharov,V.E.; Zhuravlev,V.I.; Zaslavskii, G. S.; Zakhvatkin, M. V.; Zinov'ev, A. N.; Ilinen, Yu.; Ipatov, A. V.; Kanevskii, B. Z.; Knorin, I. A.; Casse, J. L.; Kellermann, K. I.; Kovalev, Yu. A.; Kovalev, Yu. Yu.; Kovalenko, A. A.; Kogan, B. L.; Komaev, R. V.; Konovalenko, A. A.; Kopelyanskii, G. D.; Korneev, Yu. A.; Kostenko, V. I.; Kotik, A. N.; Kreisman, B. B.; Kukushkin, A. Yu.; Kulishenko, V. F.; Cooper,D.N.; Kut'kin,A.M.; Cannon,W.H.; Larionov,M.G.; Lisakov,M.M.; Litvinenko, L. N.; Likhachev, S. F.; Likhacheva, L. N.; Lobanov, A. P.;Logvinenko, S. V.; Langston, G.; MvCracken, K.; Medvedev, S. Yu.; Melekhin, M. V.; Menderov, A. V.; Murphy, D. W.; Mizyakina, T. A.; Mozgovoi, Yu. V.; Nikolaev, N. Ya.; Novikov, B. S.; Novikov, I. D.; Oreshko, V. V.; Pavlenko, Yu. K.; Pashchenko, I. N.; Ponomarev, Yu. N.; Popov, M. V.; Pravin- Kumar, A.; Preston, R. A.; Pyshnov, V. N.; Rakhimov, I. A.; Rozhkov, V. M.; Romney, J. D.; Rocha, P.; Rudakov, V. A.; Räisänen, A.; Sazankov, S. V.; Sakharov, B. A.; Semenov, S. K.; Serebrennikov, V. A.;Schilizzi, R. T.; Skulachev, D. P.; Slych, V. I.; Smirnov, A. I.; Schmidt, J. G.; Soglasnov, V. A.; Sokolovskii, K. V.; Sondaar, L. H.; Stepan'yants, V. A.; Turygin, M. S.; Tuchin, A. G.; Urpo, S.; Fedorchuk, S. D.; Finkel'shtein, A. M.; Fomalont, E. B.; Fejes, I.; Fomina, A. N.; Khapin, Yu. B.; Tsarevskii, G. S.; Zensus, J. A.; Chuprikov, A. A.; Shatskaya, M. V.; Shapirovskaya, N. Ya.; Sheikhet, A. I.; Shirshakov, A. E.; Schmidt, A.; Shnyreva, L. A.; Shpilevskii, V. V.; Ekers, R. D.; Yakimov, V. E. 2013, “"RadioAstron"-A telescope with a size of 300 000 km: Main parameters and first observational results” Astronomy Reports 57, 153—194.

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104. Bietenholz, M. F., Kondratiev, V., Ransom, S., Slane, P., Bartel, N., Buchner, S. 2013, “The Proper Motion of PSR J0205+6449 in 3C 58”, MNRAS 431, 2590 – 2598.

105. Chakraborti, S., Soderberg, A., Chomiuk, L., Kamble, A., Yadav, N., Ray, A., Hurley, K., Margutti, R., Milisavljevic, D., Bietenholz, M. F., Brunthaler, A., Pignata, G., Pian, E., Mazzali, P., Fransson, C., Bartel, N., Hamuy, M., Levesque, E., MacFadyen, A., Dittmann, J., Krauss, M., Briggs, M. S., Connaughton, V., Yamaoka, K., Takahashi, T., Ohno, M., Fukazawa, Y., Tashiro, M., Terada, Y., Murakami, T., Goldsten, J., Barthelmy, S., Gehrels, N., Cummings, J., Krimm, H., Palmer, D., Golenetskii, S., Aptekar, R., Frederiks, D., Svinkin, D., Cline, T., Mitrofanov, I. G., Golovin, D., Litvak, M. L., Sanin, A. B., Fellows, C., Harshman, K., Enos, H., von Kienlin, A., Rau, A., Zhang, X., Savchenko, V. 2015, “A Missing-Link in the Supernova-GRB Connection: The Case of SN 2012ap”, ApJ, 805, 187-194.

106. Smirnova, T. V., Shishov, V. I., Popov, M. V., Gwinn, C. R., Anderson, J. M., Andrianov, A. S., Bartel, N., Deller, A., Johnson, M. D., Joshi, B. C., Kardashev, N. S., Karrupusamy, R., Kovalev, Y. Y., Kramer, M., Soglasnov, V. A., Zensus, J. A., Zhuravlev, V. I. 2014, “RadioAstron Studies of the Nearby, Turbulent Interstellar Plasma With the longest Space-Ground Interferometer Baseline”, ApJ, 786, 115--128.

107. Bietenholz, M. F., De Colle, F., Granot, J., Bartel, N., Soderberg, A. M. 2014, “Radio limits on the off-axis GRB afterglows and VLBI observations of SN 2003gk”, MNRAS.440. 821-832.

108. King, A. L., Miller, J. M., Bietenholz, M., Gültekin, K., Reynolds, M., Mioduszewski, A., Rupen, M., Bartel, N. 2015, “The rate of gas accretion onto black holes drives jet velocity”, ApJ, 799, L8-L12.

109. Bartel, N., Bietenholz, M. F., Lebach, D. E., Ransom, R. R., Ratner, R. I., Shapiro, I. I. 2015, “VLBI for Gravity Probe B: The guide star IM Pegasi”, invited review, Special Issue: Gravity Probe B, Classical and Quantum Gravity, in press.

110. De Witt, A., Bietenholz, M. F., Kamble, A., Soderberg, A. M., Brunthaler, A., Zauderer, B., Bartel, N., Rupen, M. P. 2015, “Imaging the expanding shell of SN 2011dh”, MNRAS, in press.

111. Popov, M. V., Bartel, N.,Andrianov, A., Gwinn, C., Johnson, Joshi, B. C., Kardashev, N., Karuppusamy, R., Kovalev, Y. Y., Kramer, M., Rudnitskii, A., - 30 - - Norbert Bartel Curriculum Vitae

Safutdinov, E. R., Shishov, V., Smirnova, T., Soglasnov, V. A., Zensus, A., Zhuravlev, V. 2015, “PSR B0329+54: Substructure in the scatter-broadened image discovered with RadioAstron with up to 235,000 km baselines”, submitted to ApJ.

112. Popov, M. V., Gwinn, C., Bartel, N.,Andrianov, A., Johnson, Joshi, B. C., Kardashev, N., Karuppusamy, R., Kovalev, Y. Y., Kramer, M., Rudnitskii, A., Safutdinov, E. R., Shishov, V., Smirnova, T., Soglasnov, V. A., Steinmassl, S., Zensus, A., Zhuravlev, V. 2015, “PSR B0329+54: Scattering structures on multiple scales observed with RadioAstron on baselines up to 235,000 km”, submitted to ApJ.

113. King, A. L., Miller, J. M., Bietenholz, M., Gültekin, K., Reynolds, M., Mioduszewski, A., Rupen, M., Bartel, N. 2015, “Discrete knot ejection from the jet in a nearby low AGN, M81*”, submitted to Nature Physics.

INVITED AND CONTRIBUTED PAPERS IN NON-REFEREED PROCEEDINGS:

1. Bartel, N., 1978. Mikrostrukturbeobachtungen des Radiopulsars PSR 1133+16 mit bis zu 2.6:s Zeitauflösung im Lichte der Relativistischen Beaming Theorie,” Mitteilungen der Astronomischen Gesellschaft 43, 241-246.

2. Sieber, W., Bösel, R., Hösgen, K. -H., and Bartel, N., 1978. “Probleme der Datenaufbereitung bei Pulsarmessungen,” Kleinheubacher Berichte 21, 379-385.

3. Bartel, N., 1979. “Zum frequenzmässigen Verhalten der Einzelpulsintensitaten von Radiopulsaren,” Mitteilungen der Astronomischen Gesellschaft 45, 145-146.

4. Bartel, N., 1980. “Multi Radio Frequency Observations of Pulsars,” IAU Proceedings No. 95, Pulsars, eds., W. Sieber and R. Wielebinski, D. Reidel Publishing Co., Dordrecht, 117-185.

5. Bartel, N., Corey, B.E., Shapiro, I.I., Rogers, A.E.E., Whitney, A.R., Graham, D.A., Romney, J.D., and Preston, R.A., 1982. “Mark III VLBI Observations of the Nucleus of M81 at 2.3 and 8.3 GHz,” IAU Proceedings No. 97, Extragalactic Radio Sources, eds. D.S. Heeschen, and C.M. Wade, D. Reidel Publishing Co., Dordrecht, 387-388.

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6. Bartel, N., Ratner, M.I., Shapiro, I.I., Herring, T.A., and Corey, B.E., 1984. “Proper Motion of Components of the Quasar 3C 345,” IAU Proceedings No. 110, VLBI and Compact Radio Sources, eds. R. Fanti, K.I. Kellermann, G. Setti, D. Reidel Publishing Co., Dordrecht, 113-116.

7. Bartel, N., Cappallo, R.J., Ratner, M.I., Rogers, A.E.E., Shapiro, I.I., and Whitney, A. R., 1984. “Mark III VLBI Observations of Pulsars,” IAU Proceedings No. 110, VLBI and Compact Radio Sources, eds. R. Fanti, K.I. Kellermann, G. Setti, D. Reidel Publishing Co., Dordrecht, 275-276.

8. Marcaide, J.M., Shapiro, I.I., Ball, J.A., Bartel, N., Clark, T., Corey, B., Gorenstein, M., Preston, R., Ratner, M., Rogers, A., and Whitney, A., 1984. “Nearly Microarcsecond Precision Differential Astrometry,” IAU Proceedings No. 110, VLBI and Compact Radio Sources, eds. R. Fanti, K.I. Kellermann, G. Setti, D. Reidel Publishing Co., Dordrecht, 361-362.

9. Marcaide, J.M., Bartel, N., Cohen, N.L., Gorenstein, M.V., Shapiro, I.I., Corey, B.E., Rogers, A.E.E., Bonometti, R., Preston, R.A., and Romney, J.D., 1985. ”Simultaneous Dual Wavelength VLBI Observations of the Compact Radio Source Near the Galactic Center,” Proceedings, Active Galactic Nuclei, ed. J.E. Dyson, Manchester University Press, Manchester, 50-53.

10. Bartel, N., 1985. “Angular Diameter Determinations of Radio Supernovae and the Distance Scale, Proceedings, Supernovae as Distance Indicators,” Lecture Notes in Physics, No. 224, ed. N. Bartel, Springer Verlag, Berlin, Heidelberg, New York, Tokyo, 107-122.

11. Marcaide, J.M., Pauliny-Toth, I.I.K., Graham, D.A., Rönnäng, B., Booth, R.S., Bartel, N., Shapiro, I.I., Rogers, A.E.E., Dhawan, V., Burke, B.F., Johnston, K.J., and Spencer, J.H., 1985. “Millimeter-Wavelength VLBI: First Results from Intercontinental Observations With a Resolution of 0.2 Milliarcseconds, in (Sub) Millimeter Astronomy,” Proceedings of ESO-IRAM-Onsala Workshop held at Aspenäs, Sweden, ed. P.A. Shaver, K. Kjär, 157-167.

12. Bartel, N., 1986. “Supernovae and Cosmology,” Highlights of Astronomy, ed. J.P. Swings, D. Reidel Publishing Co., Dordrecht, 7, 655-660.

13. Bartel, N., Ratner, M.I., Rogers, A.E.E., Shapiro, I.I., Bonometti, R.J., Cohen, N.L., Gorenstein, M.V., and Marcaide, M.J., 1986. “VLBI Observations of the Compact Components in M82,” Highlights of Astronomy, ed. J.P. Swings, 7, 661-663.

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14. Padrielli, L., Aller, M.F., Aller, H.D., Bartel, N., Fanti, C., Fanti, R., Ficarra, A., Gregorini, L., Mantovani, F., Matveenko, L., Nicolson, G.D., Romney, J.D., and Weiler, K.W., 1986. “Flux Variations and Structural Changes in Extragalactic Radio Sources,” Structure and Evolution of Active Galactic Nuclei, ed. G. Giuricin et al, D. Reidel Publishing Co., Dordrecht, 653-657.

15. Bartel, N., Ratner, M., Shapiro, I., and Rogers, A., 1987. “VLBI Observations of the M81-M82 Pair of Galaxies,” IAU Proceedings No. 121, Observational Evidence of Activity in Galaxies, eds. E. Ye. Khachikian, K.J. Fricke, and J. Melnick, D. Reidel Publishing Co., Dordrecht, 521-527.

16. Reynolds, J. E., Livermore, R. W., Jauncey, D. L., Preston, R. A., Gulkis, S., and Bartel, N. 1988. “The Elusive Radio Source Supernova 1987A.” Proc. Astr. Soc. Austr. 7, 382-383.

17. Bartel, N., 1988. “Determinations of Distances to Radio Sources with VLBI,” IAU Proceedings No. 129, The Impact of VLBI on Astrophysics and Geophysics, eds. M. Reid, J.M. Moran, D. Reidel Publishing Co., Dordrecht, 175-184.

18. Gorenstein, M.V., Bonometti, R.J., Cohen, N.L., Falco, E.E., Shapiro, I.I., Bartel, N., Rogers, A.E.E., and Marcaide, J.M., 1988. “VLBI Observations of the 0957+561 Gravitational Lens System,” IAU Proceedings No. 129, The Impact of VLBI on Astrophysics and Geophysics, eds. M. Reid, J.M. Moran, D. Reidel Publishing Co., Dordrecht, 201-206.

19. Marcaide, J.M., Bartel, N., Corey, B.E., Cotton, W.D., Gorenstein, M.V., Preston, R.A., Ratner, M.I., Rogers, A.E.E., and Shapiro, I.I., 1988. “Second Epoch of Simultaneous 83.6 and 813 cm Observations of the Pair of Quasars 1038+528 A, B,” IAU Proceedings No.129, The Impact of VLBI on Astrophysics and Geophysics, eds. M. Reid, J.M. Moran, D. Reidel Publishing Co., Dordrecht, 101-102.

20. Shapiro, I., Bartel, N., Preston,R., Jones, D., Kemball, A., Nicolson, G., Jauncey, D., Reynolds, J., Whitney, A., Rogers, A., Phillips, R., Clark, T., and Robertson, D., 1988. “VLBI Observations of Supernova 1987A,” IAU Proceedings No. 129, The Impact of VLBI on Astrophysics and Geophysics, eds. M. Reid, J.M. Moran, D. Reidel Publishing Co., Dordrecht, 185-186.

21. Bartel, N., Jauncey, D.L., Kemball, A., Whitney, A.R., Rogers, A.E.E., Shapiro, I.I., Preston, R.A., Harvey, B.R., Jones, D.L., Nicolson, G.D., Norris, R.P.,

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Nothnagel, A., Phillips, R.B., and Reynolds, J.E., 1988. “Radio Observations of SN1987A,” Supernova 1987A in the Large Magellanic Cloud, eds. M. Kafatos, A. Michalitsianos, Cambridge University Press, Cambridge, England, 81-86.

22. Gwinn, C.R., Cordes, J.M., Bartel, N., Wolszczan, A. and Mutel, R., 1988. “VLBI Observations of the Scattering Disk of Pulsar 1933+16,” Proceedings No. 174, Radio Wave Scattering in the Interstellar Medium, eds. J.M. Cordes, B.J. Rickett, and D.C. Backer, American Institute of Physics, New York, 106-110.

23. Bartel, N., 1988. “Supernova VLBI, Supernova Shells and Their Birth Events,” Lecture Notes in Physics, No. 316, ed. W. Kundt, Springer Verlag, Berlin, Heidelberg, New York, Tokyo, 206-218.

24. Tang, G., Bartel, N., Ratner, M.I., Shapiro, I.I., and Baath, L., 1990. “Recent Evolution of Jet Components in 3C345 at 83.6 cm,” Parsec-Scale Radio Jets, eds. J.A. Zensus and T.J. Pearson, Cambridge University Press, Cambridge, England, 32-37.

25. Bartel, N., 1991. “VLBI Observations of Supernovae and their Remnants,” Supernovae, ed. S. Woosley, Springer Verlag, New York, 503-514.

26. Bartel, N., 1991.“An Estimate of the Distance to M100 in the Virgo Cluster via VLBI of SN1979C: Updates and Prospects,” Supernovae, ed. S. Woosley, Springer Verlag, New York, 760-765.

27. Bartel, N., 1991.“The Development of 7-mm VLBI,” Frontiers of VLBI, eds. H. Hirabayashi, M. Inoue, and H. Kobayashi, Universal Academy Press, Inc., Tokyo, 313-317.

28. Biretta, J.A., Bartel, N., and Deng, J., 1991. “Dual-Frequency Synthesis VLBI Observations of 3C84 at 18 cm Wavelength,” Radio Interferometry: Theory, Techniques and Applications, IAU Colloquium No. 113, eds. T.J. Cornwell and R.A. Perley, ASP Conference Series 19, 334-337.

29. Rupen, M.P., Bartel, N., and Foley, A.R., 1991. “VLBI Imaging of SN1986J,” SN1987A and Other Supernovae, eds. I.J. Danziger and K. Kjär, ESO Workshop and Conference Proceedings 37, Garching, 645-649.

30. Bartel, N., 1993. “Tropospheric and Ionospheric Effects on Differential Astrometry with a Ground-Space Based VLBI Array,” Propagation Effects in Space VLBI, ed.

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L. Gurvits, Astro Space Center, Moscow, National Astronomy and Ionosphere Center, Arecibo Observatory, 90-101.

31. Campbell, R.M., Bartel, N., Shapiro, I.I., Ratner, M.I., Cappallo, R.J., Whitney, A.R., Cannon, W.H., Petrachenko, W.T., Popelar, J., and Eubanks, T.M., 1993. “Towards VLBI Determinations of Pulsar Parallaxes and Proper Motions,” Sub-Arcsecond Astronomy, ed. R.D. Spencer, Cambridge University Press, 410, 673-685.

32. Rupen, M.P., Conway, J.E., Beasley, A.J., Bartel, N., Bietenholz, M.F., Sramek, R.A., Romney, J.D., Titus, M.A., Graham, D.A., Altunin, V.I., Jones, D.L., Rius, A., Venturi, T., Umana, G., Weiler, K.W., Van Dyk, S.D., Panagia, N., Cannon, W.H., Popelar, J., and Davis, R.J., 1994. “VLBI Observations of Supernova 1993J in M81: Shape Expansion, and Distance,” Proceedings, workshop on Compact Extragalactic Radio Sources, eds. J.A. Zensus and K.I. Kellermann, NRAO, Socorro, 103-108.

33. Bietenholz, M.F., Bartel, N., Rupen, M.P., Conway, J.E., Beasley, A.J. Sramek, R.A., Romney, J.D., Titus, M.A., Graham, D.A., Altunin, V.I., Jones, D.L., Rius, A., Venturi, T., Umana, G., Weiler, K.W., Van Dyk, S.D., Panagia, N., Cannon, W.H., Popelar, J., and Davis, R.J., 1994. “The Compact Core of M81,” Proceedings, workshop on Compact Extragalactic Radio Sources, eds. J.A. Zensus and K.I. Kellermann, NRAO, Socorro, 109-114.

34. Bartel, N., Bietenholz, M.F., Rupen, M.P., Conway, J.E., Beasley, A.J., Sramek, R.A., Romney, J.D., Titus, M.A., Graham, D.A., Altunin, V.I., Jones, D.L., Rius, A., Venturi, T., Umana, G., Francis, R.L., McCall, M.L., Richer, M.G., Stevenson, C.C., Weiler, K.W. , Van Dyk, S.D., Panagia, N., Canon, W.H., Popelar, J., and Davis, R.J., 1994. “First VLBI Images of SN1993J in M81,” URSI/IAU Symposium, VLBI Technology-Progress and New Observational Possibilities, eds. T. Sasao, S. Manabe, O. Kameya and M. Inoue, TERRA Scientific Publishing Company, Tokyo, p. 115-122.

35. Ratner, M.I., Lebach, D.E., Shapiro, I.I., and Bartel, N., 1996. Proceedings of the 7th Marcel Grossman Meeting on recent developments in theoretical and experimental general relativity, gravitation, and relativistic field theories, eds. R.T. Jantzen and G.M. Kaiser, Publ.: World Scientific, 1553-1554.

36. Bartel, N., Chandler, J.F., Ratner, M.I. and Shapiro, I.I., 1996. “VLBI Position Determinations for the Millisecond Pulsar B1937+21,” in Pulsars: Problems and

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Progress, IAU Coll. 160, eds. S. Johnston, M.A. Walker and M. Bailes (ASP Conference Series Vol. 105, San Francisco), 111-112.

37. Wietfeldt, R., Van Straten, W., Del Rizzo, D., Bartel, N., Cannon, W., Bailes, M., Reynolds, J., and Wilson, W., 1996. “The S2 Baseband Processing System for Phase-coherent Pulsar Observations,” in Pulsars: Problems and Progress, IAU Coll. 160, eds. S. Johnston, M.A. Walker, and M. Bailes (ASP Conference Series Vol. 105, San Francisco), 21-22.

38. Sorathia, B., Bartel, N., Bietenholz, M.F., and Carilli, C.L., 1996. “The Parsec- Scale Jet and Counterjet in Cygnus A,” in Cygnus A - A Study of a Radio Galaxy, eds. C.L. Carilli and D.E. Harris (Cambridge Univ. Press, Cambridge), 86-91.

39. Carilli, C.L., Perley, R.A., Bartel, N., and Dreher, J.W., 1996. “The Jets in Cygnus A: from pc- to kpc-scales,” in Cygnus A - A Study of a Radio Galaxy, eds. C.L. Carilli and D.E. Harris (Cambridge Univ. Press, Cambridge), 76-85.

40. Andrei, A.H. and Bartel, N., 1996. “Cyg X-1, A Benchmark Star for Tying the Optical and Radio Reference Frames,” Revista Mexicana de Astronomia y Astrophysica 4, 122-122.

41. Bartel, N., 1998. “Supernova VLBI,” SN1987A: Ten Years After, (ASP Conference Series, San Francisco) in press.

42. Bietenholz, M.F., Bartel, N., and Rupen, M.P., 1998. “Variability of the Radio Nucleus of the Galaxy M81,” Radio Emission from Galactic and Extragalactic Compact Sources, IAU Coll. 164, eds. J.A. Zensus, G.B. Taylor, and J.M. Wrobel, (ASP Conference Series, San Francisco), 144, 201-202.

43. Ebbers, A., Bartel, N., Bietenholz, M.F., Rupen, M.P., and Beasley, A.J., 1998. “ VLBI Astrometry of the Ultra-Compact Nucleus of M81,” Radio Emission from Galactic and Extragalactic Compact Sources, IAU Coll. 164, eds. J.A. Zensus, G.B. Taylor, and J.M. Wrobel, (ASP Conference Series, San Francisco), 144, 203-204.

44. Nunes, N.V. and Bartel, N., 1998. “Astrometry of the Planetary-System Millisecond Pulsar B1257+12,” Radio Emission from Galactic and Extragalactic Compact Sources, IAU Coll. 164, eds. J.A. Zensus, G.B. Taylor, and J.M. Wrobel, (ASP Conference Series, San Francisco), 144, 331-332.

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45. Rupen, M.P., Beasley, A.J., Bartel, N., Bietenholz, M.F., Graham, D.A., Altunin, V.I., Jones, D.L., Conway, J.E., Venturi, T., Umana, G., and Rius, A., 1998. “VLBI Observations of Supernova 1993J: The First 1000 Days,” Radio Emission from Galactic and Extragalactic Compact Sources, IAU Coll. 164, eds. J.A. Zensus, G.B. Taylor, and J.M. Wrobel, (ASP Conference Series, San Francisco), 144, 355-356.

46. Ratner, M.I., Lebach, D.E., Shapiro, I.I., Bartel, N., Bietenholz, M.F., Ransom, R.R., and Lestrade, J. -F., 1998. “Progress in VLBI Stellar Astrometry for the NASA/Stanford Relativity Mission (Gravity Probe B),” Radio Emission from Galactic and Extragalactic Compact Sources, IAU Coll. 164, eds. J.A. Zensus, G.B. Taylor, and J.M. Wrobel, (ASP Conference Series, San Francisco), 144, 385 – 386.

47. Bartel, N., 1998. ”Quasars, Stars, and Supernovae: Radio Astrometry with VLBI,” Astronomia Fundamental, ed. A.H. Andrei (Revista Mexicana de Astronomia y Astrophysica), in press.

48. Popov, M. V., Kondrat'ev, V. I., Altunin, V. I., Bartel, N., Cannon, W., and Novikov, A. Yu, 2000. “Parameters of microstructure and noiselike intensity fluctuation in pulsar radio emission measured with submicrosecond time resolution,” provided by the S2 VLBI recording/playback system IAU Colloquium 177, eds. M. Kramer, N. Wex, and R. Wielebinski (ASP Conference Series, San Francisco), 202, 179 - 180.

49. Bartel, N., Bietenholz, M. F., Cannon, W. H., Rupen, M. P., Beasley, A. J., Graham, D. A., Altunin, V. I., Venturi, T., Umana, G., and Conway, J. E., 2000. “A VLBI Search for a Pulsar Nebula in SN1993J in the Galaxy M81,” IAU Colloquium 177, eds. M. Kramer, N. Wex, and R. Wielebinski (ASP Conference Series, San Francisco), 202, 515-516.

50. Bartel, N. and Bietenholz, M.F., 2000. “Space-VLBI Observations of the Core-Jet in the Nearby Galaxy M81,” Astrophysical Phenomenon Revealed by Space- VLBI, eds. H. Hirabayashi, P.G. Edwards, and D.W. Murphy (Institute of Space and Astronomical Sciences, Sagauihira, Japan), 17-20.

51. Lebach, D.E., Ransom, R.R., Ratner, M.I., Shapiro, I.I, Bartel, N., Bietenholz, M.F., and Lestrade, J.-F, 2001. “VLBI Imaging and Astrometry of the RS CVn Binary Star IM Pegasi,” IAU Colloquium 205, eds. R.T. Schilizzi, S.N. Vogel, F. Paresce, M.S. Elvis (ASP Conference Series, San Francisco), 318-321.

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52. Bartel, N., Bietenholz, M.F., Rupen, M. P., Beasley, A.J., Graham, D.A., Altunin, V.I., Venturi, T., Umana, G., Cannon, W.H., and Conway, J.E., 2001. “The Core- Jet Radio Source in the Center of M81,” IAU Colloquium 205, eds. R.T. Schilizzi, S.N. Vogel, F. Paresce, M.S. Elvis (ASP Conference Series, San Francisco), 42- 43.

53. Bietenholz, M.F., Bartel, N., Rupen, M.P., Beasley, A.J., Graham, D.A., Altunin, V.I., Venturi, T., Umana, G., Cannon, W.H., and Conway, J.E., 2001. “SN1993J in M81,” IAU Colloquium 205, eds. R.T. Schilizzi, S.N. Vogel, F. Paresce, M.S. Elvis (ASP Conference Series, San Francisco), 380-383.

54. Bartel, N., 2003. “VLBI Astrometry,'' in Astrometry in Latin America, eds. R. Teixera, N.V. Leister, V.A.F. Martin, P. Benevides-Soares (ADeLA Publications Series, Universidade de Sao Paulo, Instituto de Astronomia, Geofisica e Ciencias Atmosphericas) 1, 37--44.

55. Bietenholz, M.F., Bartel, N., Rupen, M.P., Beasley, A.J., Graham, D.A., Altunin, V.I., Venturi, T., Umana, G., Cannon, W.H., and Conway, J.E., 2005. “Nine Years of VLBI Imaging of Supernova 1993J,'' IAU Colloquium 192, eds. J.M. Marcaide and K.W. Weiler (ASP Conference Series, San Francisco), p. 23 -- 28.

56. Bartel, N. and Bietenholz, M.F., 2005. “VLBI Observations of SN 1979C and SN 1986J,'' IAU Colloquium 192, eds. J.M. Marcaide and K.W. Weiler (ASP Conference Series, San Francisco), p. 105 - 109.

57. Bartel, N. and Bietenholz, M.F., 2005. “Supernova Distances with the Expanding Shock Front Method,'' in Future Directions in High Resolution Astronomy: A Celebration of the 10th Anniversary of the VLBA, eds. J. Romney and M. Reid (ASP Conference Series, San Francisco), 340, 293 -297.

58. Ransom, R.R., Bartel, N., Bietenholz, M.F., Lebach, D.E., Ratner, M.I., Shapiro, I.I., and Lestrade, J.-F, 2005. “VLBI Imaging and Astrometry of the Gravity Probe B Guide Star HR8703,'' in Future Directions in High Resolution Astronomy: A Celebration of the 10th Anniversary of the VLBA, eds. J. Romney and M. Reid (ASP Conference Series, San Francisco), 340, 506 - 510.

59. Lederman, J.I., Bartel, N., Bietenholz, M.F., Ransom, R.R., Lebach, D.E., Ratner, M.I., Shapiro, I.I., and Lestrade, J.-F., 2005. “VLBI Imaging of the Extragalactic Reference Sources of the Guide Star HR8703,'' in Future Directions in High Resolution Astronomy: A Celebration of the 10th Anniversary of the VLBA, eds.

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J. Romney and M. Reid (ASP Conference Series, San Francisco), 340, 526 – 528.

60. Ransom, R.R., Lederman, J. I., Bartel, N., Bietenholz, M.F., Lebach, D.E., Ratner, M.I., Shapiro, I.I., 2006. “A limit on the proper motion of the “core” of the quasar 3C454.3” BAAS 38, 149.

61. Bartel, N., Ransom, R. R., Bietenholz, M.F., Lebach, D.E., Ratner, M.I., Shapiro, I.I., and Lestrade, J.-F, 2008. “VLBI astrometry for the NASA/Stanford gyroscope relativity mission Gravity Probe B.” in A Giant Step: from Milli- to Micro-arcsecond Astrometry. Proc. of the IAU, Vol 248, 190-191.

62. Bartel, N., 2009. “Supernova VLBI.” in Approaching Micro-Arcsecond Resolution with VSOP-2: Astrophysics and Technology, Astronomical Society of the Pacific, eds.: Y. Hagiwara, E. Fomalont, M. Tsuboi, and Y. Murata, 402, 243-251.

63. Bietenholz, M.F., Bartel, N., Rupen, M.P., Dwarkadas, V.V., Beasley, A.J., Graham, D.A., Venturi,T., Umana, G., Cannon, W., Conway, J., 2011. “Radio Imaging of SN 1993J: The Story Continues.” In Proceedings of Science, 2011arXiv1103.1783B

64. Bartel, N. 2013. “VLBI astrometry for probing astrophysics, celestial reference frames, and general relativity.” In Memoria della Societa’ Astronomica Italiana, 83, 912.

65. Bartel, N. 2013. “Recent developments in supernova research with VLBI” IAU Symposium 296, Supernova environmental impacts, 4 – 11 January, 2013, Raijak-on-Ganges near Kolkata, India, pp 53-57.

66. Dwarkadas, V., Bauer, F., Bietenholz, M., Bartel, N. 2014. “SN 1993J- The X-ray Story of a Supernova Slowly Transitioning to a Remnant.” In The X-ray Universe 2014, ESA Symposium, in press.

67. Litvinov, D., Bietenholz, M., Rudenko, V., Biriukov, A., Kauts, V., Kulagin, V., Bartel, N., Gwinn, C., Cannon, W. 2015. “Gravitational Redshift Experiment on RadioAstron.” Cospar Symposium, Moscow, in press

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Memoranda, Other Publications

1. Johnstone, D., Di Francesco, J., Matthews, B., Bartel, N., Casassus, S., Chitsazzadeh, S., Duchene, G., Hales, A., Houde, M., Koch, P. M., Kothes, R., Lai, S-P., Moriarty-Schieven, G., Scott, D., Shang, H., Takakuwa, S., Wagg, J., , 2009. “The Science Case for Building a Band 1 Receiver for ALMA,” arXiv:0910.1609, 41 pages.

2. Di Francesco, J., Johnstone, D., Matthews, B. C., Bartel, N., Bronfman, L., Casassus, S., Chitsazzadeh, S., Chou, H., Cunningham, M., Duchene, G. et al. 2013, “The Science Case for building a Band 1 Receiver Suite for ALMA”, 2013arXiv1310.1604D.

IAU CIRCULARS and Astronomical Telegrams:

1. N. Bartel, M. Rupen, I. Shapiro, 1987. “Supernova 1986J in NGC 891,” IAU Circ. No. 4292.

2. Bartel, N., Bietenholz, M., Rupen, M., Conway, J., Beasley, A., Sramek, R., Romney, J., Titus, M., Graham, D., Altunin, V., Jones, D., Rius, A., Venturi, T., Umana, G., Francis, R., McCall, M., Richer, M., Stevenson, C., Weiler, K., Van Dyk, S., Panagia, N., Cannon, W., Popelar, I., and Davis, R., 1993,” Supernova 1993J in NGC 3031,” IAU Circ. No. 5914.

3. Bietenholz, M. F. and Bartel, N. 2007. “Radio non-detection of SN 2006gy with the VLA at 8.4 and 43 GHz.” Atel. No. 1254.

4. Bietenholz, M. F. and Bartel, N. 2008. “Continued Radio non-detection of SN 2006gy with the VLA at 8.4 and 43 GHz.” Atel. No. 1525.

5. Bietenholz, M. F. and Bartel, N. 2008. “Continued Radio non-detection of SN 2006gy with the VLA at 8.4 and 43 GHz.” Atel. No. 1657.

6. Bietenholz, M. F., Brunthaler, A., Bartel, N., Chomiuk, L., Rupen, <. P., Soderberg, A., Zauderer, B. 2011. “VLBI observations of SN 2011dh.” Atel. No. 3641.

7. Bietenholz, M. and Bartel, N. 2014. “SN 2014bc, SN 2014bi and SN 1981K not detected in radio.” Atel. No. 6429.

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