Finding a 24-day orbital period for the X-ray binary 1A 1118-616
Staubert R, Pottschmidt K, Doroshenko V, Wilms J, Suchy S, Rothschild R, Santangelo A (2011)
Publication Status: Published
Publication Type: Journal article
Publication year: 2011
Journal
Publisher: EDP SCIENCES S A
Book Volume: 527
Article Number: ARTN A7
DOI: 10.1051/0004-6361/201015737
Abstract
We report the first determination of the binary period and orbital ephemeris of the Be X-ray binary containing the pulsar 1A 1118-616 (35 years after the discovery of the source). The orbital period is found to be P(orb) = 24.0 +/- 0.4 days. The source was observed by RXTE during its last large X-ray outburst in January 2009, which peaked at MJD 54845.4, by taking short observations every few days, covering an elapsed time comparable to the orbital period. Using the phase connection technique, pulse arrival time delays could be measured and an orbital solution determined. The data are consistent with a circular orbit and the time of 90 degrees longitude was found to be T(pi/2) = MJD 54845.37(10), which is coincident with that of the peak X-ray flux.
Authors with CRIS profile
Involved external institutions
Eberhard Karls Universität Tübingen
Germany (DE)
University of California, San Diego
United States (USA) (US)
National Aeronautics and Space Administration (NASA)
United States (USA) (US)
Germany (DE)
University of California, San Diego
United States (USA) (US)
National Aeronautics and Space Administration (NASA)
United States (USA) (US)
How to cite
APA:
Staubert, R., Pottschmidt, K., Doroshenko, V., Wilms, J., Suchy, S., Rothschild, R., & Santangelo, A. (2011). Finding a 24-day orbital period for the X-ray binary 1A 1118-616. Astronomy & Astrophysics, 527. https://doi.org/10.1051/0004-6361/201015737
MLA:
Staubert, R., et al. "Finding a 24-day orbital period for the X-ray binary 1A 1118-616." Astronomy & Astrophysics 527 (2011).
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