Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atel.2257....1e&link_type=abstract
The Astronomer's Telegram, #2257
Astronomy and Astrophysics
Astronomy
2
X-Ray, Binaries, Neutron Stars
Scientific paper
The supergiant fast X-ray transient (SFXT) IGR J11215-5952 is known to undergo periodic outbursts separated by about 165 days (Sidoli et al. 2007, A&A 476, 1307). Based on this periodicity, which most likely reflects the orbital period of the binary system, we observed the source with Swift/ XRT at the time of the new outburst, that was expected on 2009 October 23 at about 14 UT, based on the ephemeris of Romano et al.
Burrows David N.
Esposito Paolo
Gehrels Neil
Kennea Jaime A.
La Parola Valentina
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