Results of observations of the X-ray source 4U1700-37 with the WATCH instrument of the GRANAT observatory

Details Results of observations of the X-ray source 4U1700-37 with the WATCH instrument of the GRANAT observatory Results of observations of the X-ray source 4U1700-37 with the WATCH instrument of the GRANAT observatory

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993astl...19..272s&link_type=abstract

Astronomy Letters, Vol. 19, p. 272-276; Pis'ma v Astronomicheskij Zhurnal (ISSN 0320-0108), vol. 19, no. 8, p. 675-685. In Russ

Astronomy and Astrophysics

Astronomy

1

Light Curve, Orbital Mechanics, X Ray Binaries, X Ray Sources, Exosat Satellite, Variability

Scientific paper

Observations of the X-ray source 4U1700-37 with the WATCH instrument on board the Granat observatory during the period from September 1991 through October 1992 are reported. The orbital period of the binary is found to decrease at a rate of (4.13 +/- 0.19) x 10 exp -6/yr. Light curves which demonstrate the strong variability of the X-ray flux from the source on different time scales are presented. The obtained orbital phase curves of 4U1700-37 are virtually symmetric in relation to the orbital phase of 0.5 in the 8-60 keV energy band.

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