Initial results from the extreme ultraviolet explorer

Details Initial results from the extreme ultraviolet explorer Initial results from the extreme ultraviolet explorer

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993adspr..13...23b&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 13, no. 12, p. (12)23-(12)31

Astronomy and Astrophysics

Astronomy

1

B Stars, Background Radiation, Late Stars, Sky Surveys (Astronomy), Ultraviolet Astronomy, White Dwarf Stars, Astronomical Photometry, Cameras, Extreme Ultraviolet Explorer Satellite, Rosat Mission, Ultraviolet Spectrometers

Scientific paper

Data obtained during the first five months of calibration and science operation of the Extreme Ultraviolet Explorer (EUVE) are presented. Spectra of an extragalactic object were obtained; the object is detectable to wavelenghts longer than 100 A, demonstrating that extragalactic EUV astronomy is possible. Spectra of a hot white dwarf, and a late-type star in quiescence and flaring are shown as examples of the type of spectrographic data obtainable with EUVE. Other objects for which broad band photometric mode data have been obtained and analyzed include an RS CVn star and several late-type stars. The backgrounds in the EUVE detectors are quite low and the character of the diffuse astronomical EUV background has been investigated using these very low rates. Evidence is presented showing that, contrary to previously published reports, EUVE is about three times more sensitive than the English Wide Field Camera in the short wavelength bandpass covered by both instruments. Only limited information has been extracted from the longer bandpasses coered only by EUVE. Nonetheless, the brightest EUV source in the sky, a B star, has been discovered and is detected only in these longer bandpasses.

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