... U. Amsterdam Explanation: The GRB distance scale controversy may have just ended with a flash . Gamma Ray Bursts (GRBs) are powerful explosions occurring in seemingly random positions on the sky. ... There they found a faint but variable optical source : a potential counterpart to the gamma-ray burst that was getting brighter. Most importantly, continued scrutiny showed that this optical transient had absorption lines with a redshift of about 0.8 - the distance scale of galaxies and quasars . ...

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• Астронет > Optical Transient Near GRB970508 Shows Distant Redshift
• Journal "Peremennye Zvezdy"
• Gamma Ray Burst, Supernova Bump

Existing studies of the atomic hydrogen gas content in distant galaxies, through the absorption of the 21-cm line, often infer that the total column density is anti-correlated with the linear extent of the background radio source. We investigate this interpretation, by dissecting the various parameters from which the column density is derived, and find that the relationship is driven primarily by the observed optical depth, which, for a given absorber size, is anti-correlated with the linear size. ...

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• A survey for the missing hydrogen in high redshift radio sources
• A survey for H I in the distant Universe: the detection of associated 21-cm
• Radio Sources in the 2dF Galaxy Redshift Survey. I. Radio source populations1

... May 13, 1997 . Optical Transient Near GRB970508 Shows Distant Redshift . ... Explanation: The GRB distance scale controversy may have just ended with a flash . ... Most importantly, continued scrutiny showed that this optical transient had absorption lines with a redshift of about 0.8 - the distance scale of galaxies and quasars . ... Above is a "negative" image of the GRB970508 field , located near the north celestial pole, taken hours after the initial flash of gamma rays. ... About APOD > . ...

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• ntptrace - trace a chain of NTP servers back to the primary source
• Sternberg Astronomical Institute
• Open Source Convention

... Galaxy Evolution home . ... The origin and evolution of radio sources . Radio sources and their environments . ... We are investigating how this interaction effects galaxy evolution in general as well as the feedback effect of the radio source on its host galaxy and AGN. ... One direct observational manifestation of this interaction is the existence of extended regions of emission-line gas which show a clear spatial relationship to the radio source itself. ...

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• Galaxy Evolution: The origin and evoltuion of radio sources
• Galaxy Evolution: Local: Journals
• Astrophysics Group AMI Publications

... The search for distant objects which can be both galaxies and quasars is one of the most important problems of observational astrphysics, because it allows one to determine cosmological parameters connected with the time of appearence and evolution of stellar systems, large scale structure of the Universe. ... Radio galaxies are important objects to be studied because they are sources of infrared-optical-ultraviolet continuum, emission lines and continual radio emission. ...

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• PUBLICATIONS IN 1998
• Radio sources identfification
• PUBLICATIONS 1998

Next: Catalog Construction Up: Observations and Analysis Previous: Source Detections . ... It was assumed that the highest signal gives the most likely position of the source. ... Comparing the summed map with the maps from the individual energy ranges, the one which produced the smallest error box was chosen to represent the source position, as long as was greater than 4, a level chosen to reflect a reasonable degree of confidence in the detection. ...

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• Optical Counterparts for 70,000 FIRST sources
• Optical spectroscopy of radio sources
• VLA 404 compact sources

Next: Publication Costs of Astronomical Research . ... Purple Mountain Observatory, Academia Sinica, Nanjing 210008, China, e-mail: library@nanjing.jspta.chinamail.sprint.com . This article includes a general overview of the Purple Mountain Observatory (PMO) followed by a description of the document resources held in the Observatory Library. ... The predecessor of the Observatory was the National Research Institute of Astronomy in the former Academia Sinica and its observing site, the PMO. ...

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• Astronomy Resources
• HST Observations of the Luminous IRAS Source FSC10214+4724: A Gravitationally
• Use and Abuse of Information Resources

. XMM-Newton Science Analysis System . ssclib (ssclib-3.29.3) [xmmsas_20070708_1801-7.1.0] . Meta Index / Home Page . Module name: source_cutouts . Author: Ian Stewart (University of Leicester, ims@star.le.ac.uk) . XMM-Newton SOC/SSC -- 2007-07-08

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• Source detection limits

... Natalya V. Raguzova and Sergei B. Popov . ... We present a compilative catalogue of Be/X-ray binaries and candidates in the Galaxy and in the Large and Small Magellanic Clouds. This catalogue contains 160 sources and provides information on names and spectral types of optical components, distances, on spin characteristics of neutron stars, and on orbital and X-ray properties of binary systems. ... Be/X-Ray Binaries and candidates in the Galaxy . Galactic sources: comments to the Table 1 . ...

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• Population Synthesis of X-ray Sources at the Galactic Center
• Astronomical Resources
• #tex2html_wrap_inline12480#-#tex2html_wrap_inline12482# Dependence for the

Next: Photometry Up: Regions and Source Parameters Previous: *imcnts* - Find counts . This task (developed for use with optical images, but also useful with x-ray data) will quickly compute location, size, ellipticity, and position angle of sources. ... User can generate contour plots of any portion of the image and count rates in slices through the image. The program is advertised as ``quick [optical] photometry''. input file: rp110590_im1.imh . output file: logfile . ... Photometry . ...

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• Source Selection
• Chandra Images for G042.8+00.6
• ChaMPlane data_archive_.html

... The formation of multiple images of a distant quasar by the gravitational lensing effect of a foreground galaxy may be very simply, and faithfully, accounted for by a wine glass experiment. Figure 1. In the wine glass experiment, a bright compact light source (at the top of the photo) serves as a distant quasar. The wine glass on the table distorts the light rays from the "quasar" and produces a caustic having with a triangular shape (see enlargement in Figure 3 ). ...

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• ASP: Resource Center
• ASP: Black Holes: An Introductory Resource List
• ASP: Publications of Interest

... The Arecibo RFI Environment : . ... This page shows the present environment for RFI at Arecibo. the web page is: http://www.naic.edu/rfiuser . The Northern VLA Sky Survey (NVSS) : . ... The NASA/IPAC Extragalactic Data Base (NED) : . This is built around a master list of extragalactic objects for which cross-identifications of names have been established, accurate positions and redshifts entered to the extent possible, and some basic data c collected. ...

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• VLBI at Arecibo Observatory
• pulsars
• AstroWeb: Astronomy/Astrophysics on the Internet

... Links . ... Hubble space telescope Hubble's Universe and Skywatch video podcast . ... Astronomy picture of the day . ... Bad Astronomy blog . ESO for science users . ... Check the e-Journal access for ESO-users on the ESO-library page. ... Astronomy & Astrophysics . ... Astronomical Journal . ... Astrophysics and Space Science . Chinese Astronomy and Astrophysics . ... Astrophysics and Space Science Proceedings . New pages in the SciOps wiki (internal, only inside ESO web) Rivi; Sep 2007 ...

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• ESO - Release of Stacked Images and Source Lists for VST ATLAS Public Survey
• ESO - New Release of Images and Source lists for VPHAS+
• Previously Identified Sources

... Tonight's Sky . ... The Magazine . ... Observing . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... January 2006 resources . FROM THE January 2006 ISSUE . ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

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• Resources for red-star fans | Astronomy.com
• February 2006 resources | Astronomy.com
• December 2005 resources | Astronomy.com

... The results of long-term monitoring of Gigahertz-Peaked Spectrum sources were found the statistically significant differences (0.05 significance level) in the high-frequency spectral index distribution between subgroups of galaxies and quasars. ... This can mean that the electron energy distribution for GPS galaxies is steeper than for GPS quasars. ... The first area corresponds to GPS-quasars that have statistically larger value of redfhift, second area corresponds to GPS-galaxies. ...

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• Metagalaxy sector, archive 1998
• Metagalaxy sector, archive 2015
• Metagalaxy sector, archive 2000

... Staff . Research staff . ... Research . ... Library . ... Who may have access to the Library? ... Or You contact the Library Staff ( This email address is being protected from spambots. ... You can borrow the books you need, but you have to leave them in your office at the disposition of the Library Staff. ... However library staff has access to the borrowed books at anytime. ... If you have further questions, please contact the Library Staff ( This email address is being protected from spambots. ...

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• On line Resources
• Labir Locally Mantained Hotlist
• Server-Wide Configuration - Apache HTTP Server

... Visited 5957 times - Selected 51 months ago . ... Visited 3425 times - Selected 51 months ago . ... Visited 5554 times - Selected 51 months ago . ... Visited 5870 times - Selected 51 months ago . ... Visited 4096 times - Selected 51 months ago . ... Visited 4225 times - Selected 51 months ago . ... Visited 3412 times - Selected 52 months ago . ... Visited 4698 times - Selected 51 months ago . ... Visited 5823 times - Selected 51 months ago . ... Visited 3067 times - Selected 51 months ago . ...

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• Optical Interferometry List of Resources, AstroGuide Listing

. english || русский . Main . Location . Telescope . Instruments . Program . Science . Publications . Images . Photos . Links . Observations of galaxy clusters from 400 square degree cluster survey. Optical identifications of new INTEGRAL, SWIFT and RXTE hard X-ray sources. Fast optical photometry of SS433. Observations of gamma-ray bursts optical afterglows. High Energy Astrophysics Department 2016 IKI RAN

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• High Energy Astrophysics Department at IKI RAN

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... des actualit†йs . ... des interviews, des portraits . ... des pages consacr†йes †а la publication de vos photos Mais c'est aussi une vraie communaut†й avec laquelle partager votre passion et nourrir votre curiosit†й. Accueil Des sources hydrothermales fossiles sur Mars . ... Pour en savoir plus sur ces sources hydrothermales et la recherche de la vie sur Mars, guettez le prochain num†йro de "Ciel & Espace", en kiosque le 24 novembre. ...

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• Des oasis sur Titan | Ciel et Espace
• Diamants : lв?TastГїroГ?de qui a crГїГї 1000 milliards de carats | Ciel et

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Sky Charts . ... UK astronomy . ... History of Astronomy . ... Astrophysics in Cyberspace . ... The Sky Tonight from the Schools Observatory . The Sky over Armagh . ... Royal Astronomical Society . ... Cork Astronomy Club . ... Links to more Journals . ... Astronomy Now . ... History of Armagh Observatory . ... Society for the History of Astronomy (UK) . American Astronomical Society - Historical Astronomy Division . ...

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• Mysterious music source revealed | International Year of Astronomy in Ireland |
• Resources | OASES Over us All is the SElfsame Sky | OASES 2010
• IAJ: Resources: Observatories