... Previous: Why Indexing the Sky is Desirable . ... An alternative algorithm, proposed here, is based on covering the sky with pixels of approximately equal area, and assigning a unique integer to each pixel. ... For each table, the pixel code value corresponding to the central position (RA, Dec) of each source is computed and inserted into a new column called PCODE. ... This cannot be the primary index of a table since PCODE values are not necessarily unique: one pixel may contain more than one...

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• Database Systems
• Sky Surveys
• Data Processing Systems

... The Impact of HST on European Astronomy . ... These range from the study of nearby planets, the processes of star and planet formation, the stellar and interstellar components of galaxies, the discovery that most, if not all, galactic nuclei harbor a massive black hole that profoundly affects their evolution, to the realisation that the universe as a whole is undergoing acceleration as a result of a yet unknown form of dark energy . ... Formation, structure and evolution of galaxies . ...

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... Behemoth black hole found in an unlikely place . ... XMM-Newton takes astronomers to a black hole's edge . Observations of iron emissions reveal that the black hole is spinning very rapidly and eating matter quickly. ... Illustration of a supermassive black hole at the center of a galaxy. Using new data from ESAт??s XMM-Newton spaceborne observatory, astronomers have probed closer than ever to a supermassive black hole lying deep at the core of a distant active galaxy known as 1H0707-495. ...

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• Swift, XMM-Newton satellites tune in to a middleweight black hole |
• Team sets new record for cosmic X-ray sightings | Astronomy.com
• Chandra celebrates the International Year of Light | Astronomy.com

... Flux density at 1 GHz (/Jy): 2720 . ... Optical: Fast knots and quasi-stationary flocculli, with many filaments at large radii, and NE `jet'. ... ADS . ... 1991, ApJ, 373, 146. VLA at 1.4 and 5 GHz (1".3) for spectral variations. ... VLA at 1.4 GHz and 4.8 GHz (both 1".3), for polarization studies. ... VLA at 1.4 GHz and 4.8 GHz, for proper motion studies. ... ISO observations. ... 1999, ApJ, 518, 284. ... 2001, ApJ, 548, 800. ... VLA at 5 GHz (6".4?6".0) for H 2 CO absorption studies. ...

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• G189.1+3.0
• G21.5-0.9
• G120.1+1.4

Astronotes Armagh Planetarium's Stellar Blog! ... Stars . ... Starbursts are short-lived events, stars are forming so quickly that the reservoirs of interstellar gas from which stars are coalescing would be used up on a timescale much shorter than the age of the galaxy . ... Strong stellar winds from giant new stars in the starburst region combine with the blasts of supernovae to push a mighty flood of extremely hot gas, a ?superwind? from the galaxy thousands of light years into intergalactic space. ...

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• Amazing multi-spectral view of Andromeda Galaxy | Astronotes

... Recherche dans le site : . Ciel Espace, le magazine qui vous guide toujours plus loin . ... des actualit†йs . ... 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 Froide Androm†иde . ... C'est le cas des anneaux de poussi†иre et de gaz, cod†йs en rouge sur l'image, lieux de naissances stellaires. ... La galaxie d'Androm†иde, ou M31, s'†йtend sur 200 000 ann†йes-lumi†иre. ...

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• La galaxie M 106 d†йvoile ses bras gazeux | Ciel et Espace
• Orion : une n†йbuleuse aux apparences trompeuses | Ciel et Espace

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... The X-ray spectrum of KL Dra observed during the faint optical state. The best-fit model using an absorbed single temperature thermal model with metalicity appropriate for CNO processed material is shown as a solid line. ... KL Dra is a helium accreting AM CVn binary system with an orbital period close to 25 mins. Approximately every 60 days there is a 4 mag optical outburst lasting тИ®10 days. ...

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• Latest News
• General Information

... SEARCH ASP SITE: Match ALL words Match ANY word . ... Night Sky Network . ... The Night Sky Network is a nationwide coalition of astronomy clubs bringing the science and inspiration of NASA's missions to the public. ... Amateur astronomy clubs dedicated to sharing astronomy with the public are invited to apply for membership in the NASA Night Sky Network ( http://nightsky.jpl.nasa.gov/ ), a free program specifically designed for amateur astronomy clubs that puts great resources right into your hands...

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• ASP: Books of Note Archives

... Non-refereed marked with NR APO PUBLICATIONS FOR 2011 -12 Papers and Theses, 11/2010-11/ 2012 Agueros, M.A., Posselt, B., Anderson, S.F., Rosenfield, P., Haberl, F., Homer, L., Margon, B., Newsom, E.R., Voges, W., 2011 , No confirmed new isolated neutron stras in the SDSS data release 4 , AJ 141, 176 Badenes, C., van Kerkwijk, M.H., Kilic, M., Bickerton, S.J., Mazeh, T., Mullaly, F., Tal-Or, L., Thompson, S.E., 2012 SDSS 1355+0856: A detached white dwarf + M ... 2011, ATEL 3126 ...

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... X-Ray Observatories Optics . Dr. Ryan Allured . ... With each new observatory, the field of X-ray instrumentation makes significant advances in both optics and detectors. In this talk, Dr. Allured will introduce the main components of an X-ray telescope. ... The concept for a successor to Chandra will be described as well as the enabling technology: adjustable X-ray optics. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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... EYEPIECE April 2013 Volume 61 Number 4 ISSN 0146-7662 Isaac Asimov Memorial "Debate About Nothing" By Richard Brounstein NASA ROVER FINDS CONDITIONS ONCE SUITED FOR ANCIENT LIFE ON MARS WASHINGTON - An analysis of a rock sample collected by NASA's Curiosity rover shows ancient Mars could have supported living microbes. ... 11 EYEPIECE April 2013 FOCUS ON THE UNIVERSE Comet Chasing: Photographing PanSTARRS By Stan Honda wasn't expecting to dodge cow chips while photographing Comet PanSTARRS. ...

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• http://www.aaa.org/EyepieceFiles/aaa/2015_03_March_Eyepiece.pdf

... Our AAAP regular season program concluded with an outstanding Jersey StarQuest in early June followed by our final meeting of the season. ... Email: ken@princetonastronomy.org Ken Kremer Science Outreach and Exploration Update Jersey Starquest: Hope, NJ, June 3-5, 2005, Attendee's enjoyed my afternoon presentations on "Deep Impact at Comet Temple 1", "Mars and Saturn in 3D" and the "Solar Sail". ... All were given simple star maps with location/info about the Deep Impact mission. ...