Preliminary scientific results from UVSTAR

Roberto Stalio; A. Lyle Broadfoot; Vojko Bratina; Jay B. Holberg; Bill R. Sandel; Paolo Trampus

doi:10.1117/12.324440

28 August 1998 Preliminary scientific results from UVSTAR

Roberto Stalio, A. Lyle Broadfoot, Vojko Bratina, Jay B. Holberg, Bill R. Sandel, Paolo Trampus

Proceedings Volume 3356, Space Telescopes and Instruments V; (1998) https://doi.org/10.1117/12.324440
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

UVSTAR, UV Spectrograph Telescope for Astronomical Research operates in the 500-1200 angstrom waveband; it has capability for long slit spectral imaging of extended cosmic sources. UVSTAR has recently flown as a Hitchhiker-M payload on the STS 85 mission of the SHuttle Discovery. UVSTAR is a joint collaboration between the University of Arizona and the University of Trieste. The instrument consists of a movable platform and an optical system The platform provides fine pointing within +/- 3 degrees from the nominal view direction, which is near the shuttle +Y axis, i.e. perpendicular to the long axis of the Shuttle and in the plane of the wings. The optical system has two channels, each formed of a telescope and Rowland concave-grating spectrograph with intensified CCD detector. The first channel, FUV, operates in the 850-1250 angstrom spectral range, the second, EUV, has covered the 500-900 angstrom region. UVSTAR includes capabilities for independent target acquisition and tracking. Here we report FUV observations, obtained in August 1997, of the sdO star BD +28 degrees 4211 which is a secondary flux standard and of the central star of the planetary nebula NGC 246, a hot degenerate star which shows strong OVI lines in the optical region. The UVSTAR spectrum of NGC 246 displays remarkable P Cygni profiles indicating a very fast stellar wind.

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Roberto Stalio, A. Lyle Broadfoot, Vojko Bratina, Jay B. Holberg, Bill R. Sandel, and Paolo Trampus "Preliminary scientific results from UVSTAR", Proc. SPIE 3356, Space Telescopes and Instruments V, (28 August 1998); https://doi.org/10.1117/12.324440

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KEYWORDS

Stars

Spectrographs

Sensors

Telescopes

Extreme ultraviolet

Ultraviolet radiation

Charge-coupled devices

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