A CHANDRA OBSERVATION OF THE BURSTING MILLISECOND X-RAY PULSAR IGR J17511-3057
Paizis A, Nowak MA, Rodriguez J, Wilms J, Chaty S, Del Santo M, Ubertini P (2012)
Publication Status: Published
Publication Type: Journal article
Publication year: 2012
Journal
Publisher: IOP PUBLISHING LTD
Book Volume: 755
Article Number: ARTN 52
Journal Issue: 1
DOI: 10.1088/0004-637X/755/1/52
Abstract
IGR J17511-3057 is a low-mass X-ray binary hosting a neutron star and is one of the few accreting millisecond X-ray pulsars with X-ray bursts. We report on a 20 ks Chandra grating observation of IGR J17511-3057, performed on 2009 September 22. We determine the most accurate X-ray position of IGRJ17511-3057, alpha(J2000) = 17(h)51(m)08(s).66, delta(J2000) = -30 degrees.57'41 ''.0 (90% uncertainty of 0 ''.6). During the observation, a similar to 54 s long type-I X-ray burst is detected. The persistent (non-burst) emission has an absorbed 0.5-8 keV luminosity of 1.7 x 10(36) erg s(-1) (at 6.9 kpc) and can be well described by a thermal Comptonization model of soft, similar to 0.6 keV, seed photons upscattered by a hot corona. The type-I X-ray burst spectrum, with average luminosity over the 54 s duration L0.5-8 (keV) = 1.6 x 10(37) erg s(-1), can be well described by a blackbody with kT(bb) similar to 1.6 keV and R-bb similar to 5 km. While an evolution in temperature of the blackbody can be appreciated throughout the burst (average peak kT(bb) = 2.5(-0.4)(+0.8) keV to tail kT(bb) = 1.3(-0.1)(+0.2) keV), the relative emitting surface shows no evolution. The overall persistent and type-I burst properties observed during the Chandra observation are consistent with what was previously reported during the 2009 outburst of IGR J17511-3057.
Authors with CRIS profile
Involved external institutions
National Institute for Astrophysics / Istituto Nazionale Astrofisica (INAF)
Italy (IT)
University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot
France (FR)
Massachusetts Institute of Technology (MIT)
United States (USA) (US)
Italy (IT)
University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot
France (FR)
Massachusetts Institute of Technology (MIT)
United States (USA) (US)
How to cite
APA:
Paizis, A., Nowak, M.A., Rodriguez, J., Wilms, J., Chaty, S., Del Santo, M., & Ubertini, P. (2012). A CHANDRA OBSERVATION OF THE BURSTING MILLISECOND X-RAY PULSAR IGR J17511-3057. Astrophysical Journal, 755(1). https://dx.doi.org/10.1088/0004-637X/755/1/52
MLA:
Paizis, Adamantia, et al. "A CHANDRA OBSERVATION OF THE BURSTING MILLISECOND X-RAY PULSAR IGR J17511-3057." Astrophysical Journal 755.1 (2012).
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