The Orbit of the Binary X-Ray Pulsar 4U 1538-52 from Rossi X-Ray Timing Explorer Observations

Details The Orbit of the Binary X-Ray Pulsar 4U 1538-52 from Rossi X-Ray Timing Explorer Observations The Orbit of the Binary X-Ray Pulsar 4U 1538-52 from Rossi X-Ray Timing Explorer Observations

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...542l.131c&link_type=abstract

The Astrophysical Journal, Volume 542, Issue 2, pp. L131-L133.

Astronomy and Astrophysics

Astronomy

14

Stars: Binaries: Eclipsing, Stars: Pulsars: Individual: Alphanumeric: 4U 1538-52, X-Rays: Stars

Scientific paper

Improved orbital parameters of the high-mass binary X-ray pulsar 4U 1538-52 have been derived from high count rate data obtained from the Rossi X-Ray Timing Explorer. Pulse-timing analysis yields an eccentricity of 0.174+/-0.015, a periastron at 64deg+/-9deg, and evidence of orbital decay with Porb/Porb = (-2.9 +/- 2.1) × 10-6 yr-1.

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