New outburst from the X-ray pulsar RX J0440.9+4431 and discovery of a possible ~155 days orbital period

Details New outburst from the X-ray pulsar RX J0440.9+4431 and discovery of a possible ~155 days orbital period New outburst from the X-ray pulsar RX J0440.9+4431 and discovery of a possible ~155 days orbital period

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011atel.3137....1t&link_type=abstract

The Astronomer's Telegram, #3137

Astronomy and Astrophysics

Astronomy

3

X-Ray, Binary, Pulsar

Scientific paper

On the basis of recent SWIFT/BAT observations we report a detection of the third consequent outburst from the X-ray pulsar RX J0440.9+4431, which was started on 2011-01-29. The persistent X-ray source RX J0440.9+4431 has been found during the ROSAT Galactic plane survey with the optical companion of BSD 24-491 / LS V +44 17) classified as a Be star (Motch et al., A&A, 323, 853, 1997). Later Reig, Roche (MNRAS, 306, 100, 1999) detected X-ray pulsations from this source with the period of ~202.5 s.

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