Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008atel.1444....1s&link_type=abstract
The Astronomer's Telegram, #1444
Astronomy and Astrophysics
Astronomy
X-Ray, Binaries, Transients
Scientific paper
We performed two observations with Swift/XRT of the transient IGR J11215-5952, the unique member of the class of the Supergiant Fast X-ray Transients (SFXTs) which undergoes periodic outbursts. At first, the outbursts were found to be equally spaced by P=329 days (Sidoli et al. 2006, A&A,450,L9; Smith et al. 2006,ATel #766), but during a monitoring campaign with Swift/XRT at the supposed apastron passage, a new unexpected outburst was observed (Romano et al.
Romano Pado
Sidoli Lara
Vercellone Stefano
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