... Early History of Optics . Key Players in the History of Science . ... Chronology of Writings about the Age of the Earth . The Age of the Earth Debate . The Nature of Science . ... Most Important Events in Astronomical History . ... On the Nature of Things - Lucretius . ... The Shapley-Curtis Debate . ...

. Search for a cluster by name: . Otherwise, search within a radius: . RA: . Dec: . Radius (arcmin): . Download the catalogue of AMI results (FITS format)

Peremennye Zvezdy ( Variable Stars ) 35 , No. ... We present the results of our new observations of QS Draconis, a recently discovered double-mode high-amplitude Scuti variable, HADS(B) type. ... Our CCD observations in the Johnson bands were performed at the Tien Shan Astronomical Observatory of the V.G. Fesenkov Astrophysical Institute, at the altitude of 2750 m above the sea level. ... The finding chart (Fig. 1) identifies the variable star, comparison star, and check star. ... Fig. ...

This document presents STScI policy for granting formal changes, additions, andalterations to accepted HST programs, as well as for repetitions of failed observations. Four types of request may be made by a GO, GTO, CS, or PC. ... The first type is a HOPR (HST Operations Problem Report), which describes an operational problem that occurred in obtaining data and which requests a repetition of the lost observation. ...

... Up: Data Analysis and Processing Techniques . ... Also, a method for quality control of CCD observations is suggested. ... Everyone who observes a celestial object using a CCD detects moving celestial objects as a ``by product''. ... We hope that our investigations may be useful for near-Earth space control and also for searches of the moving celestial objects through analysis of old and new CCD frames obtained at any amateur or professional astronomical observatory. ...

... Telescopes . ... The time requests are accepted in an electronic version with on-line form in Russian or English. ... Unregistered request will be disregarded by the Large Telescopes Programm Committee. In exclusive cases the secreatry of the Committee is entitled to accept an observational time request given permission of the Chairman of the Committee or the director of the SAO RAS. The Program Committee considers generally one time request submitted by the principal applicant. ...

... PhD Yale University, Astronomy, 2015 . ... MS, MPhil Yale University, Astronomy, 2011 . ... Plunkett, Adele L. ; Arce, H��ctor G.; Corder, Stuartt A.; Dunham, Michael M.; Mardones, Diego; Garay, Guido 2014, ApJ, 803, 22, ������Assessing molecular outflows and turbulence in the protostellar cluster Serpens South��� . ... Department of Astronomy Seminar, Universidad de Chile, Santiago, Chile April 2013 . ... Yale-University of Chile Meeting, New Haven, CT December 2011 . ...

Planned Observations sorted by Proposal ID . ... XMM-Newton SOC Home Page Conferences & Meetings . ... Data Analysis SAS News What is SAS? ... Types: CAL : Target of routine calibration plan A : Target accepted for AO-1/AO-2 with priority A B : Target accepted for AO-1/AO-2 with priority B GT : Target of guaranteed time program T(*) : Triggered target candidate accepted for AO-1/2 with priority A or B Alpha and Delta are up-dated in comparison to the coordinates previously published on the Web-pages. ...

Next: AXAF Recipes Up: ROSAT HRI Recipes Previous: Quantum Efficiency Correction (a.k.a. For some observations, a significant amount of data may have been rejected during SASS processing because the background level was higher than the calculated threshold for rejection. ... REJECTED EVENTS . ... The recipe will allow the user to include rejected events in the generation of a new qpoe file and filter on the background level. ... This creates a qpoe file with standard + rejected events. ...

ON THE IMPACT OF THE GALACTIC ABERRATION ON VLBI-DERIVED PRECESSION MODEL Z.M. MALKIN Pulkovo Observatory Pulkovskoe Ch. ... Corrections to adopted precession rate are usually computed from the linear trends in long-term time series of celestial pole offset (CPO), which are the differences between the measured and the theoretical coordinates of the celestial pole. ... CONCLUSIONS We have estimated the impact of GA on parameters of precession-nutation model derived from VLBI observations. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Lightcurve of HW Vir from images obtained using the Faulkes Telescope South, operated by Las Cumbres Observatory . The blue triangles show the difference between two stars whose brightness is constant. ... This shows the value of the Faulkes Telescopes in the follow-up observations of eclipsing binaries with the aim to detect and characterise additional circumbinary companions. ...

... Deep Radio and X-Ray observations of Pictor A . ... A study of deep observations of Pictor A in radio with the Australia Telescope Compact Array (ATCA) and in X-rays with the Chandra X-ray observatory over a time span of 15 years has just been accepted for publication in Monthly Notices: Hardcastle et al. ... This has provided further evidence of time variability in the jet and confirmed previous tentative evidence of a counter-jet. ... today * ATNF | ... ATCA | ...