Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993cub..rept.....d&link_type=abstract
Technical Report, Colorado Univ. Boulder, CO United States Dept. of Astrophysical, Planetary, and Atmospheric Sciences.
Astronomy and Astrophysics
Astronomy
Flare Stars, X Rays, X Ray Astronomy, Radio Astronomy, Ultraviolet Astronomy, Stellar Flares, Stellar Radiation, Ginga Satellite, Hubble Space Telescope, Iue, Rosat Mission, Very Large Array (Vla), Light Curve
Scientific paper
Observations on the flare star AD Leo were carried out by ROSAT on 8-9 May 1991. Contemporaneous observations were made with a large number of optical and radio telescopes around the world, and with Ginga, the Hubble Space Telescope (HST), and the International Ultraviolet Explorer (IUE). The x-ray light curves show that one flare with about 15 counts per sec was observed at 1548 UT on 8 May 1991, and another may have been observed on 0800 on 9 May 1991. Another flare was observed at about 0300 UT on 9 May 1991, apparently lasting about two hours. The flare of 8 May was also recorded by Ginga in the 10-20 keV band and the flare of 9 May, 0300 UT, was observed with the Very Large Array (VLA) at two wavelengths. Other instruments on the ground observed other flares, demonstrating that x-ray flares are not always accompanied by optical, UV, or radio emissions, and vice versa. HST observed one flare with very rapidly varying UV lines.
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