The discovery of 38.22 second X-ray pulsations from the vicinity of OAO 1653-40

Details The discovery of 38.22 second X-ray pulsations from the vicinity of OAO 1653-40 The discovery of 38.22 second X-ray pulsations from the vicinity of OAO 1653-40

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...233l.121w&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 233, Nov. 1, 1979, p. L121-L124.

Astronomy and Astrophysics

Astronomy

41

Astronomical Spectroscopy, Pulsars, X Ray Astronomy, X Ray Stars, Binary Stars, Emission Spectra, Heao 1, Iron, Spectral Line Width

Scientific paper

A 38.22-s X-ray pulsator has been discovered during an 8-hour HEAO 1 pointed observation of the area of sky containing OAO 1653-40. It is found that this pulsing source is not associated with V861 Sco, the proposed optical identification for OAO 1653-40. The spectrum is very hard, the spectral index being about 1.4, with about a 500-eV equivalent width of iron-line emission. No high-energy cutoff is observed.

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