You Can Make Stellar Images Brighter . Articles | ... A few months ago I wrote an article titled "You Can’t Make Them Brighter". So why am I now writing that you can make them brighter. ... The image of a focused star is actually a small disk called the Airy disk, named after the 19 th century scientist Sir George Airy. ... For a given aperture, a smaller Airy disk means that the light is focused to a smaller disk and is therefore brighter. ... www.astronomy.net . About Astronomy Net | ...

ALMA | ... Phase Correction Algorithms | ... On this page, we describe what the phase correction algorithms set out to do and the framework we have developed to optimally use all of the available information. ... We are developing a Bayesian framework to combine all the information we have about the current and future meterological conditions (which are naturally accommodated as priors in a Bayesian scheme) with detailed physical models of the atmosphere. ...

Statistics from S. Pesci and P. Mazza logbook. I began my visual hunting program in 1991, after some ten years of variable star observing and deep sky. My patrol galaxies were some one hundred circumpolar galaxies, which were suveryed with a 45cm home made Dobsonian. ... These are checked on average 10-15 times a year, during 35 to 45 nights (numbers depend much on weather), mostly on weekends and holidays. Since 1995 Piero Mazza has joined my search with his 40cm home made telescope. ...

... About 10% of the time is allocated to moving the telescope to the zenith and exchanging the spectrographic cartridges. ... Focus telescope (open-loop)* . ... TOTAL TIME (seconds) . ... This assumes two 60 second arc exposures and two 55 second readouts. ... Otherwise, the arc exposure will likely consist of a 30 second integration followed by a quick 28 second readout, half the normal time. ... The flat-field exposure can be read out with a quick 28 second readout, half the normal time. ...

. Latest SNe . Icons off . News . SN List . Extragalactic Novae . Sort by: . Location . Magnitude . Date . Name . Calsky: . R.A. Brightness . Age . Updates . Links . Image index . Image Gallery . Photometry Reference images . Posting Observations . Archives Site Search: . Translations . Related Sites . VSNet

Astronomy Picture of the Day . A Telescope Laser Creates an Artificial Star . ... 7.02.2005 . ... An artificial star. ... Therefore, astronomers have developed the ability to create an artificial star where they need it -- with a laser . ... Above, a laser beam shoots out of the Keck II 10-meter telescope on Mauna Kea in Hawaii in 2002, creating an artificial star. ... February 2005 . ... Publications with keywords: telescope - laser . Publications with words: telescope - laser . ...

Winer Observatory P.O. Box 797, Sonoita, Arizona 85637-0797, USA . ... Asteroid . ... Site . ... The evening of October 26, 2011, Mark Trueblood, Robert Crawford, and Larry Lebofsky used the Kitt Peak 2.1-m telescope to observe Near Earth Asteroid (NEA) 2008 QT3. ... single still jpeg frame . ... The National Optical Astronomy Observatory (NOAO) issued a press release concerning Morgan's work on Monday, November 21, 2011 and posted it on the home page of their web site . ... 2013 Winer Observatory. ...

... They are concerned with Attitude Control System of the spacecraft, satellite visibility from tracking stations, limits on the satellite autonomous operations during the orbit, and needs for auxiliary operations with the spacecraft. ... Among the operational constraints the most important one is the number of programmed slews per orbit, which determines the maximum number of radio sources to be observed during one orbit. ... System temperature (K) . ... Progress of the RadioAstron Project in Pictures...

. [ Go back to Comet WWW site ] . Andrew A. Martis . martis @ sai.msu.ru .

BRIGHT OPTICAL FLASH FROM GRB 060117 - AN EXAMPLE OF EVENT DETECTED WITH OMC CLASS INSTRUMENT Д Д Petr Kubanek1,2 , Martin JelД inek3 , Michael Prouza4,5,6 , Rene Hudec1 , and Martin Nekola1 1 Astronomicky ustav Akademie ved Ceske republiky, Ondrejov, Czech Republic ДД Д 2 INTEGRAL Science Data Center, Chemin d'Ecogia 16, Versoix, Switzerland 3 Instituto de AstrofД isica de AndalucД (IAA-CSIC), Granada, Spain ... INTEGRAL GRBs are detected during -ray observations of knows sources. ...

grdgradient - Compute directional derivative or gradient from 2-D grd file representing z(x,y) grdgradient in _ grdfile -G out _ grdfile [ -A azim [/ azim2 ] ] [ -D [ c ][ o ][ n ] ] [ -L flag ] [ -M ] [ -N [ e ][ t ][ amp ][/ sigma [/ offset ]] ] [ -S slopefile ] [ -V ] grdgradient may be used to compute the directional derivative in a given direction ( -A ), or the direction ( -S ) [and the magnitude ( -D )] of the vector gradient of the data. ... If amp is not given, default amp = 1. ...

... It is found that the correlation coefficients between