Proposal Full Title: Optical Infrared Co-Ordination Network for Astronomy Proposal Acronym: Opticon Type of Funding Scheme
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The Discovery of Exoplanets
L'Univers, S´eminairePoincar´eXX (2015) 113 { 137 S´eminairePoincar´e New Worlds Ahead: The Discovery of Exoplanets Arnaud Cassan Universit´ePierre et Marie Curie Institut d'Astrophysique de Paris 98bis boulevard Arago 75014 Paris, France Abstract. Exoplanets are planets orbiting stars other than the Sun. In 1995, the discovery of the first exoplanet orbiting a solar-type star paved the way to an exoplanet detection rush, which revealed an astonishing diversity of possible worlds. These detections led us to completely renew planet formation and evolu- tion theories. Several detection techniques have revealed a wealth of surprising properties characterizing exoplanets that are not found in our own planetary system. After two decades of exoplanet search, these new worlds are found to be ubiquitous throughout the Milky Way. A positive sign that life has developed elsewhere than on Earth? 1 The Solar system paradigm: the end of certainties Looking at the Solar system, striking facts appear clearly: all seven planets orbit in the same plane (the ecliptic), all have almost circular orbits, the Sun rotation is perpendicular to this plane, and the direction of the Sun rotation is the same as the planets revolution around the Sun. These observations gave birth to the Solar nebula theory, which was proposed by Kant and Laplace more that two hundred years ago, but, although correct, it has been for decades the subject of many debates. In this theory, the Solar system was formed by the collapse of an approximately spheric giant interstellar cloud of gas and dust, which eventually flattened in the plane perpendicular to its initial rotation axis. -
Image Quality in High-Resolution and High-Cadence Solar Imaging
Solar Physics DOI: 10.1007/•••••-•••-•••-••••-• Image Quality in High-resolution and High-cadence Solar Imaging C. Denker1 · E. Dineva1,2 · H. Balthasar1 · M. Verma1 · C. Kuckein1 · A. Diercke1,2 · S.J. Gonzalez´ Manrique3,1,2 Version: 5 February 2018 c Springer Science+Business Media Dordrecht 2016 Abstract Broad-band imaging and even imaging with a moderate bandpass (about 1 nm) provides a “photon-rich” environment, where frame selection (“lucky imag- ing”) becomes a helpful tool in image restoration allowing us to perform a cost-benefit analysis on how to design observing sequences for high-spatial resolution imaging in combination with real-time correction provided by an adaptive optics (AO) system. This study presents high-cadence (160 Hz) G-band and blue continuum image sequences obtained with the High-resolution Fast Imager (HiFI) at the 1.5-meter GREGOR so- lar telescope, where the speckle masking technique is used to restore images with nearly diffraction-limited resolution. HiFI employs two synchronized large-format and high-cadence sCMOS detectors. The Median Filter Gradient Similarity (MFGS) image quality metric is applied, among others, to AO-corrected image sequences of a pore and a small sunspot observed on 2017 June 4 and 5. A small region-of-interest, which was selected for fast imaging performance, covered these contrast-rich features and their neighborhood, which were part of active region NOAA 12661. Modifications of the MFGS algorithm uncover the field- and structure-dependency of this image quality metric. However, MFGS still remains a good choice for determining image quality without a priori knowledge, which is an important characteristic when classifying the huge number of high-resolution images contained in data archives. -
History of Astrometry
5 Gaia web site: http://sci.esa.int/Gaia site: web Gaia 6 June 2009 June are emerging about the nature of our Galaxy. Galaxy. our of nature the about emerging are More detailed information can be found on the the on found be can information detailed More technologies developed by creative engineers. creative by developed technologies scientists all over the world, and important conclusions conclusions important and world, the over all scientists of the Universe combined with the most cutting-edge cutting-edge most the with combined Universe the of The results from Hipparcos are being analysed by by analysed being are Hipparcos from results The expression of a widespread curiosity about the nature nature the about curiosity widespread a of expression 118218 stars to a precision of around 1 milliarcsecond. milliarcsecond. 1 around of precision a to stars 118218 trying to answer for many centuries. It is the the is It centuries. many for answer to trying created with the positions, distances and motions of of motions and distances positions, the with created will bring light to questions that astronomers have been been have astronomers that questions to light bring will accuracies obtained from the ground. A catalogue was was catalogue A ground. the from obtained accuracies Gaia represents the dream of many generations as it it as generations many of dream the represents Gaia achieving an improvement of about 100 compared to to compared 100 about of improvement an achieving orbit, the Hipparcos satellite observed the whole sky, sky, whole the observed satellite Hipparcos the orbit, ear Y of them in the solar neighbourhood. -
Spring Semester 2021 (F21) 1 January 2021 Until 30 June 2021
Centro Astronomico´ Hispano-Aleman´ (CAHA) Call for proposals at the Calar Alto 2.2 & 3.5 meter telescopes Spring semester 2021 (F21) 1 January 2021 until 30 June 2021 DEADLINE: October 15th, 2020 23h59m59s (CEST) at the latest Earliest date for submission: September 17th, 2020 Calar Alto, September 16th, 2020. Contact: [email protected] Contents 1 Applications for observing time at Calar Alto4 1.1 General information...........................4 1.2 Spanish open time at the CAHA 2.2- and 3.5-m telescopes......4 1.3 Proposals from PIs in Europe but out of Spain.............4 1.4 Proposals from non-European PIs...................4 1.5 Visitor and service observing modes..................5 1.5.1 Visitor mode..........................5 1.5.2 Service mode..........................5 1.6 Ongoing surveys............................6 1.6.1 On the 3.5-m telescope.....................6 1.6.2 On the 2.2-m telescope.....................6 2 Important to notice6 2.1 No visits during the COVID-19 pandemic...............6 2.2 CAFE´ ..................................7 2.3 PANIC..................................7 3 How to write a proposal7 3.1 Calar Alto instrument pages......................8 3.1.1 Instruments offered on the 3.5-m telescope..........8 3.1.2 Instruments offered on the 2.2-m telescope..........8 3.2 Science categories of proposals.....................9 3.3 Types of proposal............................9 3.3.1 Re-submitted applications...................9 3.3.2 PhD thesis projects....................... 10 3.3.3 Long term or large projects................... 10 3.3.4 Testing new instruments.................... 10 3.3.5 Visitor instruments....................... 11 3.3.6 Multiple-instrument proposals................ -
69-22,173 MARKOWITZ, Allan Henry, 1941- a STUDY of STARS
This dissertation has been microfilmed exactly u received 6 9 -2 2 ,1 7 3 MARKOWITZ, Allan Henry, 1941- A STUDY OF STARS EXHIBITING COM POSITE SPECTRA. The Ohio State University, Ph.D., 1969 A stron om y University Microfilms, Inc., Ann Arbor, Michigan A STUDY OF STARS EXHIBITING COMPOSITE SPECTRA DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State University By Allan Henry Markowitz, A.B., M.Sc. ******** The Ohio S ta te U n iv e rsity 1969 Approved by UjiIjl- A dviser Department of Astronomy ACKNOWLEDGMENTS It is a sincere pleasure to thank my adviser, Professor Arne Slettebak, who originally suggested this problem and whose advice and encouragement were indispensable throughout the course of the research. I am also greatly indebted to Professor Philip Keenan for help in classifying certain late-type spectra and to Professor Terry Roark for instructing me in the operation of the Perkins Observatory telescope, I owe a special debt of gratitude to Dr. Carlos Jaschek of the La Plata Observatory for his inspiration, advice, and encourage ment. The Lowell Observatory was generous in providing extra telescope time when the need arose. I wish to particularly thank Dr. John Hall for this and for his interest. I also gratefully acknowledge the assistance of the Perkins Observatory staff. To my wife, Joan, I owe my profound thanks for her devotion and support during the seemingly unending tenure as a student. I am deeply grateful to my mother for her eternal confidence and to my in-laws for their encouragement. -
University of Hawaii Telescopes at Mauna Kea Observatory
UNIVERSITY OF HAWAII TELESCOPES AT MAUNA KEA OBSERVATORY USER MANUAL Fourth Edition, April 1996 Last modi®ed, June 1997 Contents 1 INTRODUCTION 1 1.1 General : ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: : 1 1.2 About this Manual :: ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: : 1 1.3 Observing TimeÐPolicy and Procedures : :::: ::: :::: ::: :::: ::: :::: ::: :::: : 1 1.3.1 Students and Assistants :: ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: : 3 1.3.2 Information before Arrival : ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: : 3 1.3.3 Colloquia :: ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: : 3 1.3.4 Reports to the Director ::: ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: : 3 1.3.5 Publications and Acknowledgments ::: ::: :::: ::: :::: ::: :::: ::: :::: : 3 1.4 Newsletter :: :::: ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: : 4 1.5 Information for Visiting Observers : ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: : 4 1.5.1 Transportation from Hilo to Hale Pohaku and Mauna Kea Observatory :: :::: ::: :::: : 4 1.6 AccommodationÐThe Mid-level Facility, Hale Pohaku :::: ::: :::: ::: :::: ::: :::: : 8 1.6.1 Telephone Service : :::: ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: : 8 1.6.2 Mail Service : ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: : 8 1.6.3 Library :::: ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: : 8 2 VISITING OBSERVER EQUIPMENT 11 2.1 Packing Goods for Shipping :::: ::: :::: ::: :::: ::: :::: ::: :::: ::: :::: : 11 2.2 Transport ::: :::: ::: :::: ::: :::: ::: -
Sky Notes by Neil Bone 2005 August & September
Sky notes by Neil Bone 2005 August & September below Castor and Pollux. Mercury is soon ing June and July, it is still quite possible that Sun and Moon lost from view again, arriving at superior con- noctilucent clouds (NLC) could be seen into junction beyond the Sun on September 18. early August, particularly by observers at The Sun continues its southerly progress along Venus continues its rather unfavourable more northerly locations. Quite how late into the ecliptic, reaching the autumnal equinox showing as an ‘Evening Star’. Although it August NLC can be seen remains to be deter- position at 22h 23m Universal Time (UT = pulls out to over 40° elongation east of the mined: there have been suggestions that the GMT; BST minus 1 hour) on September 22. Sun during September, Venus is also heading visibility period has become longer in recent At that precise time, the centre of the solar southwards, and as a result its setting-time years. Observational reports will be welcomed disk is positioned at the intersection between after the Sun remains much the same − barely by the Aurora Section. the celestial equator and the ecliptic, the latter an hour − during this interval. Although bright While declining sunspot activity makes great circle on the sky being inclined by 23.5° at magnitude −4, Venus will be quite tricky major aurorae extending to lower latitudes to the former. Calendrical autumn begins at the to catch in the early twilight: viewing cir- less likely, the appearance of coronal holes equinox, but amateur astronomers might more cumstances don’t really improve until the in the latter parts of the cycle does bring the readily follow meteorological timing, wherein closing weeks of 2005. -
A Basic Requirement for Studying the Heavens Is Determining Where In
Abasic requirement for studying the heavens is determining where in the sky things are. To specify sky positions, astronomers have developed several coordinate systems. Each uses a coordinate grid projected on to the celestial sphere, in analogy to the geographic coordinate system used on the surface of the Earth. The coordinate systems differ only in their choice of the fundamental plane, which divides the sky into two equal hemispheres along a great circle (the fundamental plane of the geographic system is the Earth's equator) . Each coordinate system is named for its choice of fundamental plane. The equatorial coordinate system is probably the most widely used celestial coordinate system. It is also the one most closely related to the geographic coordinate system, because they use the same fun damental plane and the same poles. The projection of the Earth's equator onto the celestial sphere is called the celestial equator. Similarly, projecting the geographic poles on to the celest ial sphere defines the north and south celestial poles. However, there is an important difference between the equatorial and geographic coordinate systems: the geographic system is fixed to the Earth; it rotates as the Earth does . The equatorial system is fixed to the stars, so it appears to rotate across the sky with the stars, but of course it's really the Earth rotating under the fixed sky. The latitudinal (latitude-like) angle of the equatorial system is called declination (Dec for short) . It measures the angle of an object above or below the celestial equator. The longitud inal angle is called the right ascension (RA for short). -
Astronomers Discover a Distant Galaxy with a Pulse 16 November 2015
We've got the beat: Astronomers discover a distant galaxy with a pulse 16 November 2015 phase. Until now, no one had considered the effects of these stars on the light coming from more distant galaxies. In distant galaxies the light of each pulsating star is mixed with the light of many more stars that do not vary in brightness. "We realized that these stars are so bright and their pulsations so strong that they are difficult to hide," said Charlie Conroy, an assistant professor at Harvard, who led the research. "We decided to see if the pulsations of these stars could be detected even if we could not separate their light from the Hubble Space Telescope photograph of the galaxy M87, sea of unchanging stars that are their neighbors." which is 50 million light years from Earth. Credit: NASA/ESA Astronomers at Yale and Harvard have found a galaxy with a heartbeat—and they've taken its pulse. It is the first time scientists have measured the effect that pulsating, older red stars have on the light of their surrounding galaxy. The findings are published in the Nov. 16 online edition of the journal Nature. "We tend to think of galaxies as steady beacons in the sky, but they are actually 'shimmering' due to all the giant, pulsating stars in them," said Pieter van Dokkum, the Sol Goldman Professor and chair of astronomy at Yale, and co-author of the study. Later in life, stars like our Sun undergo significant changes. They become very bright and swell up to an enormous size, swallowing any planets within a An image of the pulsating star T Leporis, compared to the radius roughly equivalent to Earth's distance from size of the orbit of the Earth around the Sun. -
By John Dobson San Francisco Sidewalk Astronomers
the newsletter of the QUEEN ELIZABET H PLANETARIUM SUMMER 198 0 and the EDMONTON CENTRE, RAS C 50$ y SPECIAL TELESCOP E ISSU E NOW PLAYIN G AT QUEEN PlANETARiUM A spectacular celestial event was witnessed by th e ancien t Sumeria n civilizatio n an d ""VELA recorded i n thei r mysteriou s cuneifor m writing. Wha t wa s it ? Th e Vela Apparition APPARITION blends archaeolog y wit h astronom y i n a search for the origins o f civilzation. 3 P M and 8 P M Daily one The night sk y i s a fascinating -realm. Stars, nebulae, an d galaxie s ar e scattere d SUMMER'S throughout infinity . Join us for a tour of the sights o f th e summertim e sky . Rela x and NIGHT enjoy an evening at the Planetarium durin g One Summer's Night. 9PM Dail y A special show for special people age 3 to 7. A Fantasy O f Stars chronicle s th e FANTASY adventures o f Harol d th e Her o a s h e ventures int o th e nigh t sk y t o mee t th e constellations. A reduced admission of only o, STARS 50C for everyon e applies to thi s 3 5 minute live presentation. For more •information , „ , please phone th re Planetariu•• , , 1:3m at 0 P M Wed . and Sun . 455-0119 Vol. 2 5 No . 1 0 StOPCll SUMMER 198 0 Have Telescopes , Will Travel JOH N DOBSO N 1 0 People came from all over the city by bus, by car, by bicycle, and by foot to look through the telescope. -
A Retrospective of the GREGOR Solar Telescope in Scientific Literature
Astron. Nachr. / AN 333,No.10, 1– 6 (2012) / DOI 10.1002/asna.2012xxxxx A retrospective of the GREGOR solar telescope in scientific literature C. Denker1,⋆, O. von der L¨uhe2, A. Feller3, K. Arlt1, H. Balthasar1, S.-M. Bauer1, N. Bello Gonzalez´ 2, T. Berkefeld2, P. Caligari2, M. Collados4, A. Fischer2, T. Granzer2, T. Hahn2, C. Halbgewachs2, F. Heidecke2, A. Hofmann1, T. Kentischer2, M. Klvanaˇ 5, F. Kneer6, A. Lagg3, H. Nicklas6, E. Popow1, K.G. Puschmann1, J. Rendtel1, D. Schmidt2, W. Schmidt2, M. Sobotka5, S.K. Solanki3, D. Soltau2, J. Staude1, K.G. Strassmeier1, R. Volkmer2, T. Waldmann2, E. Wiehr6, A.D. Wittmann6, and M. Woche1 1 Leibniz-Institut f¨ur Astrophysik Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany 2 Kiepenheuer-Institut f¨ur Sonnenphysik, Sch¨oneckstraße 6, 79104 Freiburg, Germany 3 Max-Planck-Institut f¨ur Sonnensystemforschung, Max-Planck-Straße 2, 37191 Katlenburg-Lindau, Germany 4 Instituto de Astrof´ısica de Canarias, C/ V´ıa L´actea s/n, 38205 La Laguna, Tenerife, Spain 5 Astronomical Institute, Academy of Sciences of the Czech Republic, Friˇcova 298, 25165 Ondˇrejov, Czech Republic 6 Institut f¨ur Astrophysik, Georg-August-Universit¨at G¨ottingen, Friedrich-Hund-Platz 1, 37077 G¨ottingen, Germany Received 18 Aug 2012, accepted later Published online later Key words telescopes – instrumentation: high angular resolution – instrumentation: adaptive optics – instrumentation: spectrographs – instrumentation: interferometers – instrumentation: polarimeters In this review, we look back upon the literature, which had the GREGOR solar telescope project as its subject including science cases, telescope subsystems, and post-focus instruments. The articles date back to the year 2000, when the initial concepts for a new solar telescope on Tenerife were first presented at scientific meetings. -
Mètodes De Detecció I Anàlisi D'exoplanetes
MÈTODES DE DETECCIÓ I ANÀLISI D’EXOPLANETES Rubén Soussé Villa 2n de Batxillerat Tutora: Dolors Romero IES XXV Olimpíada 13/1/2011 Mètodes de detecció i anàlisi d’exoplanetes . Índex - Introducció ............................................................................................. 5 [ Marc Teòric ] 1. L’Univers ............................................................................................... 6 1.1 Les estrelles .................................................................................. 6 1.1.1 Vida de les estrelles .............................................................. 7 1.1.2 Classes espectrals .................................................................9 1.1.3 Magnitud ........................................................................... 9 1.2 Sistemes planetaris: El Sistema Solar .............................................. 10 1.2.1 Formació ......................................................................... 11 1.2.2 Planetes .......................................................................... 13 2. Planetes extrasolars ............................................................................ 19 2.1 Denominació .............................................................................. 19 2.2 Història dels exoplanetes .............................................................. 20 2.3 Mètodes per detectar-los i saber-ne les característiques ..................... 26 2.3.1 Oscil·lació Doppler ........................................................... 27 2.3.2 Trànsits