Superorbital Period in the high mass X-ray binary 2S 0114+650

Details Superorbital Period in the high mass X-ray binary 2S 0114+650 Superorbital Period in the high mass X-ray binary 2S 0114+650

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004atel..283....1f&link_type=abstract

The Astronomer's Telegram, #283

Mathematics

Probability

3

Optical, X-Ray, Binaries, Neutron Stars, Pulsars

Scientific paper

We report the identification of a superorbital period in the high mass X-ray binary 2S 0114+650. RXTE ASM observations of this object from 1996 Jan 5 to 2003 May 26 show the presence of a modulation at a period of 30.7 +/- 0.2 days. This period is detected using a Lomb-Scargle periodogram, and has a false-alarm probability of 5E-12. Epoch folding of the data gives an ephemeris of JD 2450079.4 (+/- 0.7) +30.7 (+/- 0.2)N, where N is the cycle number, with phase zero defined as the modulation minimum, and a full amplitude of 60 +/- 20%.

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