Soft X-ray emission from the vicinity of the dwarf nova AY Lyrae

Details Soft X-ray emission from the vicinity of the dwarf nova AY Lyrae Soft X-ray emission from the vicinity of the dwarf nova AY Lyrae

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979natur.279..782c&link_type=abstract

Nature, vol. 279, June 28, 1979, p. 782, 783.

Astronomy and Astrophysics

Astronomy

1

Dwarf Stars, Novae, X Ray Astronomy, Bremsstrahlung, Heao, X Ray Telescopes

Scientific paper

The detection of a low-intensity soft X-ray source in the region of the dwarf nova AY Lyrae is reported. The source, designated H1839 plus 37, appeared in superpositions of HEAO A2 X-ray scans taken on October 9, 1977; it was observed only in the energy interval 0.18 to 0.43 keV. The peak intensity was 0.014 plus or minus 0.0027 counts/sq cm/sec. If a thermal bremsstrahlung spectrum is assumed, the estimated upper temperature limit of the source is 5 million K; an upper limit of 1.4 million K is implied if a black-body fit is assumed.

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