2016A&A...596A..16B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.11CEST21:03:49

2016A&A...596A..16B - Astronomy and Astrophysics, volume 596A, 16-16 (2016/12-1)

Multi-wavelength observations of IGR J17544-2619 from quiescence to outburst.

BOZZO E., BHALERAO V., PRADHAN P., TOMSICK J., ROMANO P., FERRIGNO C., CHATY S., OSKINOVA L., MANOUSAKIS A., WALTER R., FALANGA M., CAMPANA S., STELLA L., RAMOLLA M. and CHINI R.

Abstract (from CDS):

In this paper we report on a long multi-wavelength observational campaign of the supergiant fast X-ray transient prototype IGR J17544-2619. A 150ks-long observation was carried out simultaneously with XMM-Newton and NuSTAR, catching the source in an initial faint X-ray state and then undergoing a bright X-ray outburst lasting approximately 7ks. We studied the spectral variability during outburst and quiescence by using a thermal and bulk Comptonization model that is typically adopted to describe the X-ray spectral energy distribution of young pulsars in high mass X-ray binaries. Although the statistics of the collected X-ray data were relatively high, we could neither confirm the presence of a cyclotron line in the broad-band spectrum of the source (0.5-40keV), nor detect any of the previously reported tentative detections of the source spin period. The monitoring carried out with Swift/XRT during the same orbit of the system observed by XMM-Newton and NuSTAR revealed that the source remained in a low emission state for most of the time, in agreement with the known property of all supergiant fast X-ray transients being significantly sub-luminous compared to other supergiant X-ray binaries. Optical and infrared observations were carried out for a total of a few thousand seconds during the quiescence state of the source detected by XMM-Newton and NuSTAR. The measured optical and infrared magnitudes were slightly lower than previous values reported in the literature, but compatible with the known micro-variability of supergiant stars. UV observations obtained with the UVOT telescope on-board Swift did not reveal significant changes in the magnitude of the source in this energy domain compared to previously reported values.

Abstract Copyright: © ESO, 2016

Journal keyword(s): X-rays: binaries - X-rays: binaries

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* V635 Cas HXB 01 18 31.9704429246 +63 44 33.071137750 17.05 16.64 15.19 14.34 13.22 B0.2Ve 661 0
2 SA 104- reg 12 42 21.0 -00 32 29           ~ 56 0
3 SA 107- reg 15 39.2 -00 20           ~ 89 0
4 2MASS J16463526-4507045 HXB 16 46 35.2592332854 -45 07 04.609816032   15.2       O9.5Ia 87 1
5 2MASS J16480656-4512068 HXB 16 48 06.56 -45 12 06.8           O8.5Iab 119 2
6 V* HZ Her LXB 16 57 49.8110797681 +35 20 32.487435684 11.90 14.89 13.63 13.88   B3/6ep 1920 0
7 IGR J17544-2619 HXB 17 54 25.2724584579 -26 19 52.578788584   14.71 12.94 12.10 10.38 O9Ib 164 0
8 [KRL2007b] 332 HXB 18 41 00.43 -05 35 46.5           B1Ib 115 1

    Equat.    Gal    SGal    Ecl

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2020.07.11-21:03:49

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