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Bibliography from ADS file: stencel.bib Griffin, R. E. & Stencel, R. E., “Merging Recent and Historic Spectra of 2 August 16, 2021 Aurigae: Properties of the Systemtextquoterights Components, and Discovery of a Mass Transfer Stream”, 2013PASP..125..775G ADS Stencel, R. E., “Results of the Recent textbackslashvarepsilon Aurigae Eclipse Melnick, D. & Stencel, R. E., “Spectropolarimetry of the disk of epsilon Aurigae Campaign”, 2013CEAB...37...85S ADS during the 2010 total eclipse”, 2020AAS...23614301M ADS Hoard, D., Stencel, R., & Howell, S.: 2012, Revealing the Hot Side of Epsilon Monnier, J., Aarnio, A., Absil, O., et al., “Setting the Stage for the Planet For- Aurigae, Spitzer Proposal 2012sptz.prop90097H ADS mation Imager”, 2019BAAS...51g.133M ADS Geise, K., Stencel, R. E., Manset, N., Harrington, D., & Kuhn, J., “Eclipse Lin, A. A., Shrestha, M., Wolfe, T. M., Hoffman, J. L., & Stencel, R. E., “Polar- Spectropolarimetry of the ?? Aurigae System”, 2012JAVSO..40..767G ization Observations and Models Constrain the Properties of the Bow Shock ADS around HD 230561”, 2019RNAAS...3..121L ADS Kloppenborg, B. K., Hopkins, J. L., & Stencel, R. E., “An Analysis of the Long- Schaefer, G., Duchene, G., Farrington, C. D., et al., “Binary and Multiple Star term Photometric Behavior of epsilon Aurigae”, 2012JAVSO..40..647K Systems at High Angular Resolution”, 2019BAAS...51c.483S ADS ADS Gibson, J. L., Stencel, R. E., Ketzeback, W., et al., “Structure in the disc of Pearson, R. L. & Stencel, R. E., “Modeling the Disk in the Îtextmu epsilon Aurigae - analysis of ARCES and TripleSpec spectra from the 2010 Aurigae System: a Brief Review With Proposed Numerical Solutions”, eclipse”, 2018MNRAS.479.2161G ADS 2012JAVSO..40..802P ADS Wolfe, T. M., Stencel, R. E., Ariyawansa, A., & Brown, T. G., “The Mourard, D., Harmanec, P., Stencel, R., et al., “A high angular and first polarimeter in astronomy to use a stress-engineered optic (SEO)”, spectral resolution view into the hidden companion of 2 Aurigae”, 2018SPIE10706E..3BW ADS 2012A&A...544A..91M ADS Gibson, J. L. & Stencel, R. E., “MESA models of the evolutionary state of the Mourard, D., Harmanec, P., Stencel, R., et al., “VizieR Online interacting binary epsilon Aurigae”, 2018MNRAS.476.5026G ADS Data Catalog: epsilon Aur visibility measurements (Mourard+, 2012)”, Stencel, R. E. & Gibson, J., “MESA models for the evolutionary status of the ep- 2012yCat..35440091M ADS silon Aurigae disk-eclipsed binary system”, 2018AAS...23231502S ADS Leadbeater, R., Buil, C., Garrel, T., et al., “High Cadence Measurement of Neu- Gibson, J., Stencel, R. E., ARCES Team, et al., “Structure in the Disk of epsilon tral Sodium and Potassium Absorption During the 2009-2011 Eclipse of ep- Aurigae – Analysis of ARCES and TripleSpec data from the 2010 eclipse”, silon Aurigae”, 2012JAVSO..40..729L ADS 2018AAS...23231501G ADS Stencel, R. E., “epsilon Aurigae - an Overview of the 2009-2011 Eclipse Cam- Wolfe, T. & Stencel, R. E., “Astronomy in Denver: Probing Interstellar paign Results”, 2012JAVSO..40..618S ADS Circular Polarization with Polvis, a Full Stokes Single Shot Polarimeter”, Kloppenborg, B. K., Price, A., Turner, R., Henden, A. A., & Stencel, R. E., “Col- 2018AAS...23212602W ADS laborative Research Efforts for Citizen Scientists”, 2012JAVSO..40..426K Lin, A. A., Shrestha, M., Wolfe, T., Stencel, R. E., & Hoffman, J. L., ADS “Astronomy In Denver: Polarization of Stellar Wind Bow Shocks”, Stencel, R. E., “Lessons Learned During the Recent 2 Aurigae Eclipse Observ- 2018AAS...23211705L ADS ing Campaign”, 2012JAVSO..40..239S ADS Stencel, R. E., “Astronomy in Denver: Centenary of the 1918 total solar eclipse Hoard, D. W., Ladjal, D., Stencel, R. E., & Howell, S. B., “The Invisible Monster across Denver”, 2018AAS...23211701S ADS Has Two Faces: Observations of epsilon Aurigae with the Herschel Space Pearson, R. L., Stencel, R. E., Howell, S. B., et al., “Epsilon Aurigae’s Observatory”, 2012ApJ...748L..28H ADS dark side: A thermal phase curve investigation of the near-eclipse phases”, Stencel, R., “An End in Sight”, 2012S&T...123c..18S ADS 2017AAS...23020104P ADS Griffin, R. E. & Stencel, R. E., “UV-Blue (CCD) and Historic (Photographic) 2012JAVSO..40..714G Wolfe, T. & Stencel, R. E., “Developing a Single-shot Polarimeter for Astronomy Spectra of epsilon Aurigae - Summary”, ADS with Stessed-engineered Optics”, 2017AAS...22915518W ADS Stencel, R. E., Kloppenborg, B. K., Wall, Randall E., J., et al., “Infrared Studies of Epsilon Aurigae in Eclipse”, 2011AJ....142..174S ADS Stencel, R. E., “Re-development of the Mount Evans Womble Observatory”, Chadima, P., Harmanec, P., Bennett, P. D., et al., “Spectral and photometric 2017AAS...22915501S ADS analysis of the eclipsing binary ?? Aurigae prior to and during the 2009-2011 Stencel, R. E., “Interferometric studies of disk-eclipsed binary star systems”, eclipse”, 2011A&A...530A.146C ADS 2016SPIE.9907E..17S ADS Hoard, D., Stencel, R., & Howell, S.: 2011, Epsilon Aurigae at the End of Geise, K. & Stencel, R., “Probing disk inhomogeneities using spectropolarime- Eclipse, Spitzer Proposal 2011sptz.prop80017H ADS try in the extreme binary epsilon Aurigae”, 2015IAUS..305..293G ADS Cole, G. M. & Stencel, R. E., “Polarimetry of Epsilon Aurigae from Mid Eclipse , “Commissioning Results of a New Wolfe, T. M., Stencel, R., & Cole, G. to Third Contact”, 2011SASS...30..103C ADS Polarimeter: Denver University Small Telescope Polarimeter (DUSTPol) ”, Kloppenborg, B. K., Hemenway, P., Jensen, E., Osborn, W., & Sten- 2015IAUS..305..200W ADS cel, R., “Towards A Full Orbital Solution For Epsilon Aurigae”, Kloppenborg, B. K., Stencel, R. E., Monnier, J. D., et al., “Interferome- 2011AAS...21823005K ADS try of ?? Aurigae: Characterization of the Asymmetric Eclipsing Disk”, Pequette, N., Stencel, R., & Whitney, B., “Accretion in the Disk of ep- 2015ApJS..220...14K ADS silon Aurigae: Results of Monte Carlo Radiative Transfer Modelling”, Stencel, R. E., Blatherwick, R. D., & Geballe, T. R., “Transient Carbon Monox- 2011AAS...21822505P ADS ide (Co) Absorption and Persistent Brackett Alpha (Brα) Emission in the Stencel, R. E., Kloppenborg, B., Sitko, M., Rayner, J., & Tokunaga, A., “Discov- Spectrum of ?? Aurigae”, 2015AJ....149..109S ADS ery Of Strong Helium 10830A Absorption In The Mid-eclipse Disk Of Epsilon Pearson, Richard L., I. & Stencel, R. E., “Constraints from Asymmetric Heating: Aurigae”, 2011AAS...21822504S ADS Investigating the Epsilon Aurigae Disk”, 2015ApJ...798...11P ADS Kloppenborg, B. K., Price, A., Turner, R., Henden, A., & Stencel, R., “Collab- Stencel, R. E.: 2015, ε Aurigae: A Two Century Long Dilemma Persists, orative Research Efforts For Citizen Scientists”, 2011AAS...21812612K Vol. 408, 107 2015ASSL..408..107S ADS ADS Pearson, R. L., Stencel, R. E., Hoard, D. W., & Howell, S. B., “Spitzer obser- Stencel, R. E., “Lessons Learned During the Recent Epsilon Aurigae Eclipse vations of epsilon Aurigae’s disk temperature”, 2015AAS...22534903P Observing Campaign”, 2011AAS...21810305S ADS ADS Chadima, P., Harmanec, P., Bennett, P. D., et al., “VizieR Online Data Stencel, R. E., “A Look Inside the Disk in the 2 Aurigae Binary System”, Catalog: Spectral and UBV analysis of epsilon Aur (Chadima+ 2011)”, 2014ASPC..487..383S ADS 2011yCat..35300146C ADS , “Resolving The Future Of Astronomy With Long-Baseline Interferometry”, Stencel, R. E., Kloppenborg, B., Wall, R., et al., “Infrared Studies of Epsilon 2014ASPC..487.....C ADS Aurigae in Eclipse 2010”, 2011AAS...21725709S ADS Geise, K. & Stencel, R., “Constraining Disk Characteristics Using Broadband Seebode, S., Howell, S. B., Drumheller, D., et al., “Ring-like Structures Around and Spectropolarimetric Observations of the Eclipsing Binary System epsilon Epsilon Aurigae Companion”, 2011AAS...21725708S ADS Aurigae”, 2013AGUFM.P43B2012G ADS Howell, S. B., Stencel, R. E., & Hoard, D. W., “Hubble Space Telescope Ultra- Hoard, D., Howell, S., & Stencel, R.: 2013, As the Disk Turns... Monitoring the violet Observations of Epsilon Aurigae”, 2011AAS...21725707H ADS Azimuthal Thermal Gradient of the Irradiated Dust Disk in Epsilon Aurigae, Leadbeater, R., Buil, C., Garrell, T., et al., “Spectroscopic Wonders During The Spitzer Proposal 2013sptz.prop10008H ADS 2010 Eclipse Of Epsilon Aurigae”, 2011AAS...21725704L ADS Geise, K. M. & Stencel, R. E., “Spectrally-Polarized Features in Epsilon Aurigae Kloppenborg, B. K., Stencel, R., Monnier, J. D., et al., “Interferomet- In and Out of Eclipse”, 2013giec.conf20201G ADS ric Images Of The Transiting Disk In The Epsilon Aurigae System”, Pearson, R. L. & Stencel, R. E., “Three-dimensional Models of the Epsilon 2011AAS...21725703K ADS Aurigae Disk System”, 2013giec.conf20103P ADS Clover, J., Jackson, B. V., Buffington, A., et al., “Analysis of Epsilon Aurigae Stencel, R. E., “Selected results from the epsilon Aurigae eclipse campaign, and light curve from the Solar Mass Ejection Imager”, 2011AAS...21725702C what lies ahead”, 2013giec.conf20101S ADS ADS 1 Hopkins, J. & Stencel, R. E., “Campaign Photometry During The 2010 Eclipse Hart, A. H., van Belle, G. T., Creech-Eakman, M. J., & Stencel, R. E., “Spectro- Of Epsilon Aurigae”, 2011AAS...21725701H ADS Interferometrically Resolved Angular Diameters of Giants and Supergiants”, Stencel, R. E., “Interferometric Imaging of Epsilon Aurigae”, 2009AAS...21349117H ADS 2011AAS...21722405S ADS Price, A., De Pree, C., Fortson, L., et al., “Citizen Science for the International Kloppenborg, B. K., Stencel, R. E., Price, A., Turner, R., & Henden, A., “De- Year of Astronomy”, 2009AAS...21346501P
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    The Search for the Elusive Companion of EG Andromedae Joseph E. Pesce and Robert E. Stencel Center for Astrophysics and Space Astronomy University of Colorado Boulder, CO 80309-0391 USA and Nancy A. Oliversen Computer Sciences Corporation Greenbelt, Maryland USA Abstract: We report observations at opposite quadratures of the interacting symbiotic binary EG Andromedae (HD 4174, Period = 470d). Correcting for absolute motion at the system, it appears that many of the nebular lines arise from material that moves with the red giant star. The He II feature appears to track the hot component. It may be possible to use this feature in other, similar systems in order to "pin-down" the mass ratio. The optical spectrum of EG Andromedae was first noted by Wilson (1950) to consist _1 of a high velocity (vr= -96 km s : Oliversen et al, 1985) M2 giant upon which were superposed the optical emission lines of 0 III] and the Balmer series. The ultraviolet spectrum exhibits a far UV continuum and emission lines of C IV, He II, 0 III] and other species. The companion star is thought to be similar to the central star of a planetary nebula (Kenyon 1983). Oliversen et al (1985) have used the spectroscopic motion of the red giant features and an estimate of the mass of the hot object (0.7 M©) to approximate the mass ratio of about 3.5. Oliversen et al report that the red giant optical absorption features undergo an esti­ mated 15 km s_1 total velocity excursion between orbital quadratures. With a mass ratio of 3.5, we predict that the hot object should exhibit 53 km s_1 in spectral line displace­ ment.
  • Milestone Goto-Bino Series .Cdr

    Milestone Goto-Bino Series .Cdr

    Kson MilestoneK Standard Alt/Az GOTO Mount INSTRUCTIONS CONTENT FOR KSON STANDARD ALT/AZ GOTO USER INTRODUCTION.................................................................................1 ACCESSORIES..................................................................................2 ASSEMBLY INSTRUCTIONS.............................................................3 FEATURES.........................................................................5 OPERATION MANUAL FOR SKYTOUCH CONTROLLER............... 6 KEY DESCRIPTION.................................................................................6 STATUS DESCRIPTION...........................................................................6 OPERATION PROCESS...........................................................................7 POWER ON......................................................................................7 WARNING........................................................................................7 ALIGNMENT STATUS........................................................................7 CHANGE THE DATE..................................................................7 CHANGE THE TIME...................................................................8 CHANGE THE SITE...................................................................8 ALIGNMENT.............................................................................9 NAVIGATION STATUS.....................................................................11 MENU STATUS................................................................................11
  • COMMISSION 27 of the I.A.U. INFORMATION BULLETIN on VARIABLE STARS Nos. 3001

    COMMISSION 27 of the I.A.U. INFORMATION BULLETIN on VARIABLE STARS Nos. 3001

    COMMISSION 27 OF THE I.A.U. INFORMATION BULLETIN ON VARIABLE STARS Nos. 3001 - 3100 1987 March - 1987 October EDITORS: L. SZABADOS and B. SZEIDL KONKOLY OBSERVATORY H-1525 BUDAPEST P.O. Box 67, HUNGARY HU ISSN 0374 - 0676 CONTENTS 3001 PHOTOELECTRIC ELEMENTS AND REVISED SPECTRAL TYPES OF XX Cas R.K. Srivastava 18 March 1987 3002 HR 2554 - A POSSIBLE NEW Zeta Aur SYSTEM Thomas B. Ake, S.B. Parsons 19 March 1987 3003 53 PISCIUM - LARGER AMPLITUDE Marek Wolf 23 March 1987 3004 OBSERVATIONS AND A TIME OF MINIMUM OF TV Cet Daniel B. Caton, R. Lee Hawkins 25 March 1987 3005 ON THE PRIMARY MINIMUM OF ECLIPSING BINARY AY Cam J.B. Srivastava, C.D. Kandpal 30 March 1987 3006 AN UNEXPECTEDLY EARLY FADING OF V644 Cen (CPD -60d3278) J.K. Davies, A. Evans, M.F. Bode, D.C.B Whittet 3 April 1987 3007 PHOTOELECTRIC OBSERVATIONS OF TT ARIETIS ON 1/2 OCTOBER 1986 S. Rossiger 6 April 1987 3008 DELTA Cap: A POSSIBLE RS CVn BINARY R.K. Srivastava 9 April 1987 3009 ON THE CONSTANCY OF SOME STARS IN NGC 2287 = MESSIER 41 Brian A. Skiff 13 April 1987 3010 AN IMPROVEMENT OF THE ROTATIONAL PERIOD OF CQ UMa Zdenek Mikulasek 16 April 1987 3011 CORRECT PERIOD OF THE ECLIPSING STAR MN AURIGAE H. Gessner 16 April 1987 3012 JHK LIGHT CURVES OF CG CYGNI J.K. Davies, D.K. Bedford, J.J. Fuensalida, M.J. Arevalo 17 April 1987 3013 OPTICAL BEHAVIOUR OF THE X-RAY BINARY V1727 CYGNI = 4U 2129+47 IN 1986 W.