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Journal articles
A Double-peaked Outburst of A 0535+26 Observed with INTEGRAL, RXTE, and Suzaku
I. Caballero
K. Pottschmidt
D. M. Marcu
L. Barragan
C. Ferrigno
D. Klochkov
J.A. Zurita Heras
1, 2
S. Suchy
J. Wilms
P. Kretschmar
A. Santangelo
I. Kreykenbohm
F. Fürst
R. Rothschild
R. Staubert
M. H. Finger
A. Camero-Arranz
K. Makishima
T. Enoto
W. Iwakiri
Y. Terada
1
APC - AHE - APC - Astrophysique des Hautes Energies
APC (UMR_7164) - AstroParticule et Cosmologie, Dipartimento di Astronomia, Universita degli Studi di Bologna
Y. Terada
Author
1
APC - AHE - APC - Astrophysique des Hautes Energies (Italy)
- APC (UMR_7164) - AstroParticule et Cosmologie (APC - UMR 7164, Université Paris Diderot, 10 rue Alice Domon et Léonie Duquet, case postale 7020, F-75205 Paris Cedex 13 - France)
- Observatoire de Paris (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - Université Paris sciences et lettres (60 rue Mazarine 75006 Paris - France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : DRF/IRFU (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- UPD7 - Université Paris Diderot - Paris 7 : UMR_7164 (5 rue Thomas-Mann - 75205 Paris cedex 13 - France)
- CNRS - Centre National de la Recherche Scientifique : UMR_7164 (France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- Observatoire de Paris (61 Av de l'Observatoire 75014 PARIS - France)
- Dipartimento di Astronomia, Universita degli Studi di Bologna (Italy)
- UNIBO - Alma Mater Studiorum Università di Bologna [Bologna] (Via Zamboni, 33 - 40126 Bologna - Italy)
2
APC (UMR_7164) - AstroParticule et Cosmologie (APC - UMR 7164, Université Paris Diderot, 10 rue Alice Domon et Léonie Duquet, case postale 7020, F-75205 Paris Cedex 13 - France)
- Observatoire de Paris (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - Université Paris sciences et lettres (60 rue Mazarine 75006 Paris - France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : DRF/IRFU (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- UPD7 - Université Paris Diderot - Paris 7 : UMR_7164 (5 rue Thomas-Mann - 75205 Paris cedex 13 - France)
- CNRS - Centre National de la Recherche Scientifique : UMR_7164 (France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
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 ~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.
Document type :
Journal articles
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http://hal.in2p3.fr/in2p3-00903709
Contributor : Alina Deniau Connect in order to contact the contributor
Submitted on : Tuesday, November 12, 2013 - 6:29:54 PM
Last modification on : Thursday, November 18, 2021 - 3:57:12 AM
Contributor : Alina Deniau Connect in order to contact the contributor
Submitted on : Tuesday, November 12, 2013 - 6:29:54 PM
Last modification on : Thursday, November 18, 2021 - 3:57:12 AM
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Identifiers
- HAL Id : in2p3-00903709, version 1
- ARXIV : 1301.4856
- BIBCODE : 2013ApJ...764L..23C
- DOI : 10.1088/2041-8205/764/2/L23
Collections
IN2P3 | OBSPM | UNIV-PARIS7 | APC | CNRS | CEA | IRFU-APC | DSM-IRFU | CEA-DRF | UNIV-PARIS | UP-SCIENCES | PSL
Citation
I. Caballero, K. Pottschmidt, D. M. Marcu, L. Barragan, C. Ferrigno, et al.. A Double-peaked Outburst of A 0535+26 Observed with INTEGRAL, RXTE, and Suzaku. The Astrophysical journal letters, Bristol : IOP Publishing, 2013, 764 (2), pp.L23. ⟨10.1088/2041-8205/764/2/L23⟩. ⟨in2p3-00903709⟩
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