A DOUBLE-PEAKED OUTBURST OF A 0535+26 OBSERVED WITH INTEGRAL, RXTE, AND SUZAKU
Caballero I, Pottschmidt K, Marcu DM, Barragan L, Ferrigno C, Klochkov D, Heras JAZ, Suchy S, Wilms J, Kretschmar P, Santangelo A, Kreykenbohm I, Fuerst F, Rothschild R, Staubert R, Finger MH, Camero-Arranz A, Makishima K, Enoto T, Iwakiri W, Terada Y (2013)
Publication Status: Published
Publication Type: Journal article
Publication year: 2013
Journal
Publisher: IOP PUBLISHING LTD
Book Volume: 764
Article Number: ARTN L23
Journal Issue: 2
DOI: 10.1088/2041-8205/764/2/L23
Abstract
The Be/X-ray binary A 0535+26 showed a normal (type I) outburst in 2009 August. It is the fourth in a series of normal outbursts associated with the periastron, but is unusual because it presented a double-peaked light curve. The two peaks reached a flux of similar to 450 mCrab in the 15-50 keV range. We present results of the timing and spectral analysis of INTEGRAL, RXTE, and Suzaku observations of the outburst. The energy-dependent pulse profiles and their evolution during the outburst are studied. No significant differences with respect to other normal outbursts are observed. The centroid energy of the fundamental cyclotron line shows no significant variation during the outburst. A spectral hardening with increasing luminosity is observed. We conclude that the source is accreting in the sub-critical regime. We discuss possible explanations for the double-peaked outburst.
Authors with CRIS profile
Jörn Wilms
Professur für Astronomie und Astrophysik
Ingo Kreykenbohm
Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut
Involved external institutions
Eberhard Karls Universität Tübingen
Germany (DE)
University of Maryland, Baltimore County
United States (USA) (US)
University of Geneva / Université de Genève (UNIGE)
Switzerland (CH)
University of Tokyo
Japan (JP)
University of California, San Diego
United States (USA) (US)
Riken Institute of Physical and Chemical Research / 理研
Japan (JP)
University of Alabama in Huntsville (UAH)
United States (USA) (US)
Spanish National Research Council / Consejo Superior de Investigaciones Científicas (CSIC)
Spain (ES)
University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot
France (FR)
Saitama University / 埼玉大学
Japan (JP)
California Institute of Technology (Caltech)
United States (USA) (US)
European Space Astronomy Centre (ESAC)
Spain (ES)
Germany (DE)
University of Maryland, Baltimore County
United States (USA) (US)
University of Geneva / Université de Genève (UNIGE)
Switzerland (CH)
University of Tokyo
Japan (JP)
University of California, San Diego
United States (USA) (US)
Riken Institute of Physical and Chemical Research / 理研
Japan (JP)
University of Alabama in Huntsville (UAH)
United States (USA) (US)
Spanish National Research Council / Consejo Superior de Investigaciones Científicas (CSIC)
Spain (ES)
University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot
France (FR)
Saitama University / 埼玉大学
Japan (JP)
California Institute of Technology (Caltech)
United States (USA) (US)
European Space Astronomy Centre (ESAC)
Spain (ES)
How to cite
APA:
Caballero, I., Pottschmidt, K., Marcu, D.M., Barragan, L., Ferrigno, C., Klochkov, D.,... Terada, Y. (2013). A DOUBLE-PEAKED OUTBURST OF A 0535+26 OBSERVED WITH INTEGRAL, RXTE, AND SUZAKU. Astrophysical Journal Letters, 764(2). https://dx.doi.org/10.1088/2041-8205/764/2/L23
MLA:
Caballero, I., et al. "A DOUBLE-PEAKED OUTBURST OF A 0535+26 OBSERVED WITH INTEGRAL, RXTE, AND SUZAKU." Astrophysical Journal Letters 764.2 (2013).
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