Orbital Modulation and Long Term Spin-up Rate of SWIFT J1626.6-5156

Details Orbital Modulation and Long Term Spin-up Rate of SWIFT J1626.6-5156 Orbital Modulation and Long Term Spin-up Rate of SWIFT J1626.6-5156

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atel.2250....1b&link_type=abstract

The Astronomer's Telegram, #2250

Astronomy and Astrophysics

Astronomy

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

Scientific paper

We report on the long-term pulse period history of the ~15.35s X- ray pulsar SWIFT J1626.6-5156 obtained from pulse timing analysis of RXTE- PCA observations between MJD ~53724 and MJD ~54379. A preliminary circular orbit fit to the pulse period history between MJD ~53924 (200 days after the first observation) and MJD ~54379 reveals an orbital period of ~132.9 days. From this preliminary fit to the pulse period history, we obtain an (a/c)sini value of ~405sec which corresponds to a mass function value of ~4.2 Solar mass.

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