Camera artifacts in IUE low-dispersion spectra

Details Camera artifacts in IUE low-dispersion spectra Camera artifacts in IUE low-dispersion spectra

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasp..102..463c&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 102, April 1990, p. 463-477.

Astronomy and Astrophysics

Astronomy

48

Astronomical Spectroscopy, Cameras, Iue, Emission Spectra, Exposure, Phosphorescence, Sky Surveys (Astronomy)

Scientific paper

Sky-background images obtained by the International Ultraviolet Explorer (IUE) were analyzed to study artificial spectral features (camera artifacts) in low-dispersion spectra. The artifacts mimic emission features and have been present in long-exposure spectra since the launch of the IUE satellite. The camera artifacts are strong in spectra characterized by long exposure times because they scale in time-integrated flux with the background level, which increases during the exposure due to camera phosphorescence. The artifacts cannot be detected in spectra obtained from short, direct exposures of flat-field lamps or standard stars. Plots of average sky-background spectra for the three operational IUE cameras (SWP, LWP, and LWR) are given to aid scientists in the identification of artifacts in their spectra.

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