Suzaku observation of IGR J16318-4848
Barragan L, Wilms J, Pottschmidt K, Nowak MA, Kreykenbohm I, Walter R, Tomsick JA (2009)
Publication Status: Published
Publication Type: Journal article
Publication year: 2009
Journal
Publisher: EDP SCIENCES S A
Book Volume: 508
Pages Range: 1275-1278
Journal Issue: 3
DOI: 10.1051/0004-6361/200810811
Abstract
We report on the first Suzaku observation of IGR J16318-4848, the most extreme example of a new group of highly absorbed X-ray binaries that have recently been discovered by the International Gamma-Ray Astrophysics Laboratory (INTEGRAL). The Suzaku observation was carried out between 2006 August 14 and 17, with a net exposure time of 97 ks.The average X-ray spectrum of the source can be well described (chi(2)(red) = 0.99) with a continuum model typical for neutron stars i.e., a strongly absorbed power law continuum with a photon index of 0.676(42) and an exponential cutoff at 20.5(6) keV. The absorbing column is N-H = 1.95(3) x 10(24) cm(-2). Consistent with earlier work, strong fluorescent emission lines of Fe K alpha, Fe K beta, and Ni K alpha are observed. Despite the large N-H, no Compton shoulder is seen in the lines, arguing for a non-spherical and inhomogeneous absorber. Seen at an average 5-60 keV absorbed flux of 3.4x10(-10) erg cm(-2) s(-1), the source exhibits significant variability on timescales of hours.
Authors with CRIS profile
Jörn Wilms
Professur für Astronomie und Astrophysik
Ingo Kreykenbohm
Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut
Involved external institutions
University of California, Berkeley
United States (USA) (US)
University of Maryland, Baltimore County
United States (USA) (US)
University of Geneva / Université de Genève (UNIGE)
Switzerland (CH)
Massachusetts Institute of Technology (MIT)
United States (USA) (US)
United States (USA) (US)
University of Maryland, Baltimore County
United States (USA) (US)
University of Geneva / Université de Genève (UNIGE)
Switzerland (CH)
Massachusetts Institute of Technology (MIT)
United States (USA) (US)
How to cite
APA:
Barragan, L., Wilms, J., Pottschmidt, K., Nowak, M.A., Kreykenbohm, I., Walter, R., & Tomsick, J.A. (2009). Suzaku observation of IGR J16318-4848. Astronomy & Astrophysics, 508(3), 1275-1278. https://dx.doi.org/10.1051/0004-6361/200810811
MLA:
Barragan, L., et al. "Suzaku observation of IGR J16318-4848." Astronomy & Astrophysics 508.3 (2009): 1275-1278.
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