... Archive for September 2009 . ... Posted by hlee . ... Category: Algorithms , arXiv , Cross-Cultural , Data Processing , Imaging , Jargon | ... A number of practical Bayesian data analysis books are available these days. ... Algorithms arXiv Astro Bad AstroStat Bayesian CHASC Cross-Cultural Data Processing Fitting Frequentist Galaxies gamma-ray High-Energy Imaging Jargon Job Languages MC MCMC Meta Methods Misc News Nuggets Objects Optical Physics Quotes Spectral Stars Stat Timing Uncertainty X-ray . ...

... In collaborative work with David Garc?a Alvarez (an Observatory PhD student now at Harvard) and John Butler, an extensive study of the RS CVn binary HR1099 was completed leading to two papers; the first on Doppler imaging and the second on flare activity. Spectra for the Doppler imaging were taken at two different sites, Kitt Peak National Observatory (KPNO), Arizona, and Mount Stromlo Observatory (MSO), Australia, during the 1998 MUltiSIte COntinuous Spectroscopic (MUSICOS) campaign. ...

Seven months ago, on Mar 19, 2008, at 09:12 Moscow time, a new star appeared on the sky. The Sun had already risen over the Russia, but people of the Western hemisphere might be able to see by their eyes a faint starlet near one of Bootes constellation stars. This starlet appeared and faded by an order of magnitude in a minute. Astronomers named it GRB080319B or, informally, the Naked-Eye Burst, as it was twice as bright as human eye can see a star. ... Royal Astronomical Society . ...

... The Scientist's Expert Assistant (SEA) is a prototype effort for the Next Generation Space Telescope that uses a combination of artificial intelligence and user interface techniques to explore ways to substantially reduce the time and effort involved in proposal preparation for both scientists and the telescope operations staff. ... At the time, SEA supported only a single observation, had the basics of a graphical exposure calculator and a visual target tuner, and had a very limited expert system. ...

... Rumors of a Strange Universe . ... In the language of cosmologists, a large cosmological constant is directly implied by new distant supernovae observations. Suggestions of a cosmological constant (lambda) are not new -- they have existed since the advent of modern relativistic cosmology . ... NASA Web Site Statements, Warnings, and Disclaimers . ... Publications with keywords: cosmology - universe - supernova . Publications with words: cosmology - universe - supernova . ...

The Astrophysical Research Consortium Small Aperture Telescope (ARCSAT) is a 0.5-m (or 20") Classical Cassegrain telescope, formerly known as the SDSS Photometric Telescope (PT). ... Chief Telescope Engineer : Bill Ketzeback (bketzeba/apo.nmsu.edu) . Remote Operations Upgrade Project Manager : Joe Huehnerhoff (jwhueh/apo.nmsu.edu) . ... SurveyCam PI : Dmitry Bizyaev (dmbiz/apo.nmsu.edu) . FlareCam PI : Joe Huehnerhoff ( jwhueh/apo.nmsu.edu ) . ...

... STScI-PRC00-10 "HUBBLE TAKES A CLOSE-UP VIEW OF A REFLECTION NEBULA IN ORION" Just weeks after NASA astronauts repaired the Hubble Space Telescope in December 1999, the Hubble Heritage Project snapped this picture of NGC 1999, a nebula in the constellation Orion. ... NGC 1999 is an example of a reflection nebula. ... The star is so young that it is still surrounded by a cloud of material left over from its formation, here seen as the NGC 1999 reflection nebula. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Planets . ... Alien Life . ... Space Flight . ... Prof. Pinklepot and the Aliens (Image credit: D-Signs and Displays ) . ... A sing-song concludes our visit to Planet Alien and the time-machine begins to start up again.€а We make our way back to Planet Earth and Professor Pinklepot thanks us for coming on this massive journey with him.€а The images used during the fly through space are stunning and we get a real sense of moving through the Cosmos. ...

... Seminar archive . ... Type Ia Supernovae (SNe Ia) have an important role to measure a distance to an anonymous galaxy because they have a good correlation of the decline rates of the light curves with the absolute luminosity. ... First, super-Chandrasekhar SNe which have extremely high luminosity, slow decline rate of the light curves, slow expansion velocity and strong carbon features. ... As another example of diversity of SNe Ia, I would like also to introduce Type Iax SNe. ... All seminars: . ...

... The Science Operation Department is composed of Astronomers, Telescope Instruments Operators(TIOs) and Data Handling Administrators(DHAs). ... Astronomers have proposed several methods to quantitatively measure the amount of turbulence above the telescope, which the most common ones is Differential Image Motion Monitor (DIMM). In optical testing, the Hartmann test is the common method to test the quality of optical components. ... Hartmann mask consists of 48 lenses. ...

... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astron