X-ray observations of OAO 1657-415 with TENMA and GINGA

Details X-ray observations of OAO 1657-415 with TENMA and GINGA X-ray observations of OAO 1657-415 with TENMA and GINGA

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasj...42..785k&link_type=abstract

Astronomical Society of Japan, Publications (ISSN 0004-6264), vol. 42, no. 6, 1990, p. 785-792.

Astronomy and Astrophysics

Astronomy

11

Ginga Satellite, Pulsars, Spaceborne Astronomy, X Ray Binaries, X Ray Spectra, Heao 2, Japanese Spacecraft, Neutron Stars, Oao, Spectrum Analysis

Scientific paper

A pulse timing analysis of X-ray pulsar OAO 1657-415 with the Tenma and Ginga satellites is presented. The long-term pulse period history shows a spin-up trend, with an average rate of -0.001/yr. An upper limit to a(x) sin i of 3 lt-s was obtained for the projected semimajor axis for a range of orbital periods of 1 to 6 d. The X-ray spectrum obtained with Ginga was found to be typical of those of other binary X-ray pulsars.

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