Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...424..714s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 424, no. 2, p. 714-728
Astronomy and Astrophysics
Astronomy
323
Background Radiation, Data Processing, Data Reduction, Interstellar Matter, Pulse Amplitude, Spectral Bands, X Ray Astronomy, Computer Programs, Data Bases, Image Processing, Proportional Counters, Rosat Mission, Sky Surveys (Astronomy), X Ray Imagery, X Ray Telescopes
Scientific paper
Proper reduction of ROSAT observations of extended sources or the diffuse background requires techniques that are quite different from the standard point-source analysis. We describe in detail an appropriate set of procedures for this purpose for the X-ray Telescope (XRT), Position Sensitive Proportional Counter (PSPC). We define a standard set of pulse-height bands recommended for analyzing extended structure and describe the use of detector efficiency maps for proper flat-fielding of images. Sources of noncosmic background contamination and their modeling and subtraction are discussed and demonstrated. IDL routines for implementing these data reduction procedures are being made available to the community through the ROSAT IDL library maintained at Goddard Space Flight Center (GSFC).
Burrows David N.
McCammon Dan
Mendenhall Jeffrey A.
Snowden Steve L.
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