2008A&A...487..619S


C.D.S. - SIMBAD4 rel 1.7 - 2020.03.30CEST16:29:23

2008A&A...487..619S - Astronomy and Astrophysics, volume 487, 619-623 (2008/8-4)

INTEGRAL and Swift/XRT observations of the SFXT IGR J16479-4514: from quiescence to fast flaring activity.

SGUERA V., BASSANI L., LANDI R., BAZZANO A., BIRD A.J., DEAN A.J., MALIZIA A., MASETTI N. and UBERTINI P.

Abstract (from CDS):

The fast X-ray transient IGR J16479-4514 is known to display flares typically lasting a few hours. Recently, its counterpart has been identified with a supergiant star, therefore the source can be classified as a member of the newly discovered class of Supergiant Fast X-ray Transients (SFXTs); specifically, it is the one with the highest duty cycle. Characterize the quiescent X-ray behaviour of the source and compare its broad band spectrum to those during fast X-ray flares. We analysed IBIS and JEM-X data with OSA 5.1, along with archival Swift/XRT data. We present results from a long-term monitoring of IGR J16479-4514 with detailed spectral and timing information on 19 bright fast X-ray flares, 10 of which are newly discovered. We also report the first results on the quiescent X-ray emission. The typical luminosity value (∼1034erg/s) is about 2 orders of magnitude greater than what is typical of SFXTs, while its broad band X-ray spectrum has a shape very similar to the shape during fast X-ray transient activity, i.e. a rather steep power law with Γ∼2.6. IGR J16479-4514 is characterised by a quiescent X-ray luminosity higher than what is typical of other known SFXTs but lower than persistent emission from classical SGXBs. We suggest that this source is a kind of transition object between these two systems, supporting the idea that there is a continuum of behaviour between the class of SFXTs and that of classical persistent SGXBs.

Abstract Copyright:

Journal keyword(s): gamma rays: observations - X-rays: binaries - X-rays: bursts - X-rays: individual: IGR J16479-4514 - X-rays: general

Status at CDS:  

Simbad objects: 6

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Number of rows : 6

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* GP Vel HXB 09 02 06.8610736194 -40 33 16.896402010 6.85 7.37 6.87 6.31 6.05 B0.5Ia 1362 0
2 HD 146628 * 16 19 29.5213460341 -49 45 40.716565476 10.23 10.58 10.06 10.02   B1/2Ia 63 1
3 IGR J16195-4945 HXB 16 19 32.1829528980 -49 44 30.564960595   17.4 16.8 15.3 15.6 B1sg 47 0
4 2MASS J16415078-4532253 HXB 16 41 50.7854893198 -45 32 25.452141297           O8.5(sg?) 92 2
5 2MASS J16480656-4512068 HXB 16 48 06.56 -45 12 06.8           O8.5Iab 119 2
6 2MASS J17430133-3622221 HXB 17 43 01.336 -36 22 22.18       16.8   OI 41 2

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2020.03.30-16:29:23

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