EUVE Pigeonholes: A Source Analysis Procedure

During the six-month all-sky survey and subsequent guest observer observations, the Extreme Ultraviolet Explorer (EUVE) data analysis staff have been gathering photons from expected source positions on the sky into source ``pigeonholes.'' A pigeonhole contains photons for a region of the sky around an expected EUV source, a catalog of which was determined before launch. This electronic filing procedure has been the central data product for the analysis of EUVE sources. This procedure reduces the size of the data sets required for individual source analysis. The structure of a pigeonhole is herein described, along with some of the procedures for source verification and analysis facilitated by the pigeonhole concept. This work has been supported by NASA contract NAS5-29298.