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2011ATel.3200....1R - The Astronomer's Telegram, 3200, 1 (2011/March-0)
New Swift observations of the SFXT IGR J11215-5952 in outburst.
ROMANO P., ESPOSITO P., VERCELLONE S., MANGANO V., BURROWS D.N., CUSUMANO G., FARINELLI R., KENNEA J.A., LA PAROLA V. and GEHRELS N.
Abstract (from CDS):
The Swift/XRT observations started on 2011 March 1 at 12:16:46 (effective exposure 2.4 ks). IGR J11215-5952 was detected with a mean count rate of (1.1±0.1)E-01 counts/s (1-10 keV). The average XRT/PC spectrum can be fit with an absorbed powerlaw model with a photon index of Gamma=1.0-0.5+0.6 and an absorbing column density of NH=(2.2-1.0+1.3)E+22 cm-2 (Cash statistics C-stat=542.6; 51% of 1E4 Monte Carlo realizations with statistic < C-stat). The mean observed (unabsorbed) 1-10 keV flux is 1.2E-11 erg/cm2/s (1.5E-11 erg/cm2/s), which translates into a luminosity of about 0.7E35 erg/s (assuming the optical counterpart HD 306414 at a distance of 6.2 kpc, Masetti et al. 2006 A&A, 449, 1139). These findings are consistent with those of previous outbursts (Romano et al. 2007, A&A, 469, L5; Sidoli et al 2007, A&A, 476, 1307; Romano et al. 2009, ApJ, 696, 2068; Atel #2257).
We thank the Swift Team for making these observations possible, in particular the duty scientists and the science planners.
SFXT Project web page: http://www.ifc.inaf.it/cgi-bin/pubIASF.cgi?href=activities/sfxt/index.html
Abstract Copyright: ∼
Journal keyword(s): Binary - Transient - Pulsar
Simbad objects: 1
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