A 44 Day Period in AX J1700.2-4220 from Swift/BAT Observations

Details A 44 Day Period in AX J1700.2-4220 from Swift/BAT Observations A 44 Day Period in AX J1700.2-4220 from Swift/BAT Observations

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atel.2559....1c&link_type=abstract

The Astronomer's Telegram, #2559

Astronomy and Astrophysics

Astronomy

X-Ray, Binaries, Black Holes, Neutron Stars, Stars

Scientific paper

AX J1700.2-4220 is a poorly studied X-ray source that may be a high-mass X-ray binary (Negueruela & Schurch, 2007, A&A, 461, 631; Bird et al., 2010, ApJ Supp., 186, 1). An analysis of the 15 - 50 keV light curve of this source obtained with the Swift/BAT covering 2005-02-12 through 2010-03-30 (MJD 53,413 to 55,285) reveals highly significant modulation at a period near 44 days. In order to characterize the modulation we fitted a sine wave to the light curve and derived: Tmax (MJD) = 54342.0 (+/- 0.5) + n x 44.12 (+/- 0.04) where Tmax is the time of maximum flux.

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