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Session 13 - Surveys, SETI and Pollution.
Display session, Monday, June 08
Atlas Ballroom,

[13.03] The USNO Radio Reference Frame Image Database

A. L. Fey, K. A. Kingham, R. A. Gaume (U.S. Naval Observatory)

The U.S. Naval Observatory (USNO) Radio Reference Frame Image Database is a collection of over 1000 VLBI 'snapshot' images of over 300 compact extragalactic radio sources (quasars, BL Lacs, etc.). Images are obtained from VLBA observations and/or from geodetic/astrometric observations at frequencies of 2 GHz, 8 GHz, and 15 GHz. These data are the result of an ongoing program to image International Celestial Reference Frame (ICRF) sources on a regular basis and are being used by us primarily to monitor sources for variability and/or structural changes so that the sources can be evaluated for continued suitability as reference frame objects. However, the data are available for scientific use by anyone. PostScript format plots of images and/or visibility data are available directly from our World Wide Web site at Images and/or visibility data in FITS format can be obtained upon request.

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Program listing for Monday