Statistics – Computation
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...182.0303c&link_type=abstract
American Astronomical Society, 182nd AAS Meeting, #03.03; Bulletin of the American Astronomical Society, Vol. 25, p.788
Statistics
Computation
Scientific paper
One of the primary scientific goals of the Extreme Ultraviolet Explorer (EUVE) mission is to carry out an all-sky survey of astronomical sources of extreme ultraviolet radiation in four bandpasses covering the 70 to 760 Angstroms region of the spectrum. The survey phase, lasting six months, was completed January 22, 1993. The EUVE survey database (EUVECATDB) was designed and implemented to store and maintain all fundamental science data of EUVE sources from the survey. Source position and flux information in each filter bandpass are calculated using the EUVE End-to-End System software and stored in EUVECATDB, which is updated as new sources are detected. Currently, there are more than 7000 sources in EUVECATDB. The database is implemented by a combination of a Sybase Transact SQL (sequential query language) script and Unix shell scripts. Some of the database's built-in algorithms were designed to carry out computations automatically and also to categorize all entries based on a comparison with ROSAT's Wide Field Camera sources. We will present diagrams with details of the seven major tables and their relations within the database. EUVECATDB is also installed in NASA's Astrophysics Data System (XADS) with the purpose of making the database available to the scientific community via a variety of methods, including an X-window user interface. We will provide examples of commands used to extract the most commonly queried scientific information from astronomical source catalogs. This work has been supported by NASA contract NAS5-30180.
Chen Tairong
Craig Nathaniel
Fruscione Antonella
Hawkins Isabel
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