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The All Sky Automated Survey (ASAS) is a Polish project implemented on 7 April 1997 to do photometric monitoring of approximately 20 million stars brighter than 14 magnitude all over the sky.〔(ASAS Home page - Highlights )〕 The automatic telescopes discovered two new comets in 2004 and 2006. The ASAS-South, located in Chile and ASAS-North, located in Hawai'i, are managed by Grzegorz Pojmański of the Warsaw University Observatory via the internet. The idea was initiated by the Polish astronomy Professor Bohdan Paczyński of Princeton University. The prototype instrument and data pipeline were designed and built by Grzegorz Pojmański. The work on the ASAS program began in 1996 with a mere $1 million budget. The automatic telescope, located in Las Campanas Observatory, Chile, was designed to register the brightness of circa one million stars in the Southern Hemisphere. However, it proved very efficient and helped to find many new variable stars. The project was then expanded, and now operates four telescopes located in Las Campanas Observatory. The Chilean observatory is operated by the Carnegie Institution of Washington.〔(Polish telescope discovers new comet ) article in AngolaPress〕 So far, ASAS has discovered 50,000 variables located south of declination +28°, which means that it has covered 3/4 of all the sky. Pojmański comes to Chile only once every year. The telescope works automatically. Routine work such as exchanging of the data is done by the Optical Gravitational Lensing Experiment (OGLE) observers. Such an intervention is needed once a week. On each starry night when an OGLE observator opens or closes the dome, the ASAS booth is opened or closed automatically.〔 (Bohdan Paczyński tells about ASAS during the ceremony of awarding him with the title of doctor honoris causa by Wrocław University )〕 Grzegorz Pojmański is supported in the project by the State Committee for Scientific Research, Poland. The project is assisted by OGLE observers. Paczyński was supported by William Golden. ==The ASAS 1-2 systems== The prototype ASAS instrument, equipped with 768x512 Kodak CCD and 135/1.8 telephoto lens, and mounted on the computer controlled robotic mount, operated from 7 April 1997 until 6 June 2000. Prototype took about 15 3-minute exposures (covering 90 sq. deg.) per hour (over 120 per night) with limiting I-magnitude 13 and resolution of 14 arcsec/pixel. Initial setup consisted of 24 fields covering 150 sq. deg. (later increased to 50 fields - 300 sq. deg) monitored few times each night.〔(The ASAS 1-2 systems )〕 ASAS 2 results obtained during 1997-2000 available at the ASAS website contain: * The ASAS-2 Photometric I-band Catalog - giving interactive access to over 50 million measurements of over 140,000 stars, * Sky Atlas - graphic interface to the I-band Catalog, * The ASAS-2 Catalog of Variable Stars containing over 350 Periodic and 3500 Miscellaneous variables, * The ASAS Gallery presenting collection of the variables' light curves. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「All Sky Automated Survey」の詳細全文を読む スポンサード リンク
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