A DOUBLE-PEAKED OUTBURST OF A 0535+26 OBSERVED WITH INTEGRAL, RXTE, AND SUZAKU

Journal article


Publication Details

Author(s): 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
Journal: Astrophysical Journal Letters
Publisher: IOP PUBLISHING LTD
Publication year: 2013
Volume: 764
Journal issue: 2
ISSN: 2041-8205
eISSN: 2041-8213


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.


FAU Authors / FAU Editors

Kreykenbohm, Ingo Dr.
Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut
Wilms, Jörn Prof. Dr.
Professur für Astronomie und Astrophysik


External institutions with authors

California Institute of Technology (Caltech)
Eberhard Karls Universität Tübingen
European Space Astronomy Centre (ESAC)
Riken / 理研
Saitama University / 埼玉大学
Spanish National Research Council / Consejo Superior de Investigaciones Científicas (CSIC)
University of Alabama in Huntsville (UAH)
University of California, San Diego
University of Geneva / Université de Genève (UNIGE)
University of Maryland, Baltimore County
University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot
University of Tokyo


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).

BibTeX: 

Last updated on 2019-23-08 at 08:33