Direct UV observations of the circumstellar envelope of alpha Orionis

Details Direct UV observations of the circumstellar envelope of alpha Orionis Direct UV observations of the circumstellar envelope of alpha Orionis

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281a.249s&link_type=abstract

In ESA, A Decade of UV Astronomy with the IUE Satellite, Volume 1 p 249-252 (SEE N89-10682 01-89)

Astronomy and Astrophysics

Astronomy

1

Iue, Spaceborne Astronomy, Stellar Envelopes, Supergiant Stars, Ultraviolet Astronomy, Ultraviolet Spectra, Light Scattering, Signal Processing, Ultraviolet Spectroscopy

Scientific paper

Observations were made in the IUE LWP camera, low dispersion mode, with alpha Ori being offset various distances from the center of the Long Wavelength Large Aperture along its major axis. Signal was acquired at all offset positions and is comprised of unequal components of background/dark counts, telescope-scattered light, and scattered light emanating from the extended circumstellar shell. The star is known from optical and infrared observations to possess an extended, arc-minute sized, shell of cool material. Attempts to observe this shell with the IUE are described, although the deconvolution of the stellar signal from the telescope scattered light requires further calibration effort.

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