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Scattered light in the echelle modes of the Goddard High Resolution Spectrograph aboard the Hubble Space Telescope. II - Analysis of in-flight spectroscopic observations

1993; IOP Publishing; Volume: 413; Linguagem: Inglês

10.1086/173008

1538-4357

Jason A. Cardelli, Dennis Ebbets, Blair D. Savage,

Photocathodes and Microchannel Plates

view Abstract Citations (46) References (26) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Scattered Light in the Echelle Modes of the Goddard High Resolution Spectrograph aboard the Hubble Space Telescope. II. Analysis of In-Flight Spectroscopic Observations Cardelli, Jason A. ; Ebbets, Dennis C. ; Savage, Blair D. Abstract We report on an analysis of observations made with the GHRS aboard the HST for the purpose of calibrating the effects of scattered light. The data were obtained during the first 2 years of flight operations as part of the Science Verification, Science Assessment Observations, and Guaranteed Time Observations programs. Both the general level of background light near the spectra and the filling-in of the cores of saturated interstellar absorption lines have been determined as functions of grating, order, wavelength, and aperture. The behavior is in accordance with our detailed analysis of prelaunch laboratory data and validates both the observing procedures and the data reduction developed on the basis of that experience. We present and discuss the use of a background (scattered light) removal algorithm designed to produce net spectra properly corrected for the effects of grating scattered light. The coefficients of the scattered light removal algorithm have been determined, and recommended numerical values are presented. Publication: The Astrophysical Journal Pub Date: August 1993 DOI: 10.1086/173008 Bibcode: 1993ApJ...413..401C Keywords: Hubble Space Telescope; In-Flight Monitoring; Light Scattering; Spectrographs; Stellar Spectra; Echelle Gratings; Spectrum Analysis; Astronomy; INSTRUMENTATION: SPECTROGRAPHS; METHODS: DATA ANALYSIS; ULTRAVIOLET: STARS full text sources ADS | data products SIMBAD (7) MAST (1) ESA (1) Related Materials (1) Part 1: 1990ApJ...365..789C