Background Subtraction in WFPC2 Frames

Details Background Subtraction in WFPC2 Frames Background Subtraction in WFPC2 Frames

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996wfpc.rept....3f&link_type=abstract

Instrument Science Report WFPC2 96-03, 9 pages

Computer Science

Hubble Space Telescope, Hst, Space Telescope Science Institute, Wide Field Camera 2, Wfc2

Scientific paper

Accurate photometry with the WFPC2 depends in part on accurate determination of the background level. This is complicated by the presence of cosmic rays and hot pixels, and by the discrete sampling of the input signal by the analog-to-digital converter. The purpose of this note is to estimate the rough errors on typical point source photometry introduced by standard methods of background fitting in IRAF, and to identify practical strategies for dealing with the background with existing IRAF software.

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