The Hopkins Ultraviolet Telescope - Performance and calibration during the Astro-1 mission

Abstract

view Abstract Citations (123) References (21) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Hopkins Ultraviolet Telescope: Performance and Calibration during the Astro-1 Mission Davidsen, Arthur F. ; Long, Knox S. ; Durrance, Samuel T. ; Blair, William P. ; Bowers, Charles W. ; Conard, Steven J. ; Feldman, Paul D. ; Ferguson, Henry C. ; Fountain, Glen H. ; Kimble, Randy A. ; Kriss, Gerard A. ; Moos, H. Warren ; Potocki, Kenneth A. Abstract Results are reported of spectrophotometric observations, made with the Hopkins Ultraviolet Telescope (HUT), of 77 astronomical sources throughout the far-UV (912-1850 A) at a resolution of about 3 A, and, for a small number of sources, in the extreme UV (415-912 A) beyond the Lyman limit at a resolution of about 1.5 A. The HUT instrument and its performance in orbit are described. A HUT observation of the DA white dwarf G191-B2B is presented, and the photometric calibration curve for the instrument is derived from a comparison of the observation with a model stellar atmosphere. The sensitivity reaches a maximum at 1050 A, where 1 photon/sq cm s A yields 9.5 counts/s A, and remains within a factor of 2 of this value from 912 to 1600 A. The instrumental dark count measured on orbit was less than 0.001 counts/s A. Publication: The Astrophysical Journal Pub Date: June 1992 DOI: 10.1086/171424 Bibcode: 1992ApJ...392..264D Keywords: Astro Missions (Sts); Calibrating; Spaceborne Telescopes; Spectrographs; Ultraviolet Telescopes; Astronomical Spectroscopy; Extreme Ultraviolet Radiation; Far Ultraviolet Radiation; Mirrors; Spaceborne Astronomy; Spectrophotometry; Stellar Atmospheres; Astronomy; ARTIFICIAL SATELLITES; SPACE PROBES; INSTRUMENTATION: SPECTROGRAPHS; STARS: INDIVIDUAL ALPHANUMERIC: G191-B2B; STARS: WHITE DWARFS; ULTRAVIOLET: GENERAL full text sources ADS | data products SIMBAD (2) MAST (1)