Please use this identifier to cite or link to this item:
|Title:||Confirmation of the supergiant fast X-ray transient nature of AX J1841.0-0536 from Swift outburst observations|
La Parola V.
Evans, P. A.
Kennea, J. A.
Burrows, D. N.
Krimm, H. A.
Krimm, H. A.
|Citation:||Monthly Notices of the Royal Astronomical Society: Letters, 2011, 412 (1), L30-L34|
|Abstract:||Swift observed an outburst from the supergiant fast X-ray transient (SFXT) AX J1841.0−0536 on 2010 June 5, and followed it with X-ray Telescope (XRT) for 11 d. The X-ray light curve shows an initial flare followed by a decay and subsequent increase, as often seen in other SFXTs, and a dynamical range of ∼1600. Our observations allow us to analyse the simultaneous broad-band (0.3–100 keV) spectrum of this source, for the first time down to 0.3 keV, which can be fitted well with models usually adopted to describe the emission from accreting neutron stars in high-mass X-ray binaries, and is characterized by a high absorption (NH∼ 2 × 1022 cm−2), a flat power law (Γ∼ 0.2) and a high-energy cut-off. All of these properties resemble those of the prototype of the class, IGR J17544−2619, which underwent an outburst on 2010 March 4, whose observations we also discuss. We show how well AX J1841.0−0536 fits in the SFXT class, based on its observed properties during the 2010 outburst, its large dynamical range in X-ray luminosity, the similarity of the light curve (length and shape) to those of the other SFXTs observed by Swift and the X-ray broad-band spectral properties.|
|Rights:||This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society: Letters ©: 2011 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. Deposited with reference to the publisher’s open access archiving policy.|
|Appears in Collections:||Published Articles, Dept. of Physics and Astronomy|
Files in This Item:
|MNRAS-2011-Romano-L30-4.pdf||757.84 kB||Adobe PDF||View/Open|
Items in LRA are protected by copyright, with all rights reserved, unless otherwise indicated.