NOAO >   Observing Info >   Approved Programs >   2007B-0259

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Proposal Information for 2007B-0259


PI: Brian McLean, Space Telescope Science Institute, mclean@stsci.edu
Address: Archive SCience Branch, 370 San Martin Drive, Baltimore, MD 21218, USA

CoI: Beatrice Bucciarelli, INAF-Astronomical Observatory of Turin
CoI: Jorge Garcia Yus, Gemini Southern Observatory, Chile
CoI: Charles Loomis, Space Telescope Science Institute
CoI: Alessandro Spagna, INAF-Astronomical Observatory of Turin

Title: Photometric Calibrators for the Guide Star Catalog II

Abstract: The latest GSC-II release (GSC2.3) includes positions, proper motions, photographic photometry (blue J, red F and near-IR N), and star/nonstar classification of nearly 1 billion objects to a limiting magnitude of J~eq 22 and F~eq 20.5. Besides its obvious applications for telescope operations and space missions planning, the all-sky astro-photometric properties of GSC-II make it a highly valuable tool for a wide range of astrophysical investigations and data mining. A major effort toward the construction of such a catalog has been the collection of ad-hoc photometric sequences (a total of ~ 1780) for the linearization of the density-to-intensity response of each survey plate; this is summarized by the realization of the CCD-based, photometric catalogue GSPC-II. More details on the GSC- II and GSPC-II, and their releases, can be found at www- gsss.stsci.edu/Catalogs/Catalogs.htm With this proposal we are addressing the remaining 56 northern fields still lacking photometric calibrators; these fields were among the targets of a previous KPNO proposal (ID 2006B-0060), but did not get proper observations because of poor weather.


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