2010A&A...519A...6B


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.02CET05:55:12

2010A&A...519A...6B - Astronomy and Astrophysics, volume 519, A6-6 (2010/9-1)

The supergiant fast X-ray transients XTE J1739-302 and IGR J08408-4503 in quiescence with XMM-Newton.

BOZZO E., STELLA L., FERRIGNO C., GIUNTA A., FALANGA M., CAMPANA S., ISRAEL G. and LEYDER J.C.

Abstract (from CDS):

Supergiant fast X-ray transients are a subclass of high mass X-ray binaries that host a neutron star accreting mass from the wind of its OB supergiant companion. They are characterized by an extremely pronounced and rapid variability in X-rays, which still lacks an unambiguous interpretation. A number of deep pointed observations with XMM-Newton have been carried out to study the quiescent emission of these sources and gain insight into the mechanism that causes their X-ray variability. We continued this study by using three XMM-Newton observations of the two supergiant fast X-ray transient prototypes XTEJ1739-302 and IGRJ08408-4503 in quiescence. An in-depth timing and spectral analysis of these data have been carried out. We found that the quiescent emission of these sources is characterized by both complex timing and spectral variability, with multiple small flares occurring sporadically after periods of lower X-ray emission. Some evidence is found in the XMM-Newton spectra of a soft component below ∼2keV, similar to that observed in the two supergiant fast X-ray transients AXJ1845.0-0433 and IGRJ16207-5129 and in many other high mass X-ray binaries. We suggest some possible interpretations of the timing and spectral properties of the quiescent emission of XTEJ1739-302 and IGRJ08408-4503 in the context of the different theoretical models proposed to interpret the behavior of the supergiant fast X-ray transients.

Abstract Copyright:

Journal keyword(s): X-rays: binaries - stars: individual: XTEJ1739-302 - stars: individual: IGRJ08408-4503 - stars: neutron - X-rays: stars

Simbad objects: 15

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Number of rows : 15

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 EM* GGA 104 HXB 01 47 00.2121223849 +61 21 23.661992704 11.76 12.09 11.366 11.00 10.52 B1IIIe 173 0
2 V* X Per HXB 03 55 23.0778791365 +31 02 45.045745259 6.090 6.840 6.720     O9.5III 917 0
3 HD 74194 HXB 08 40 47.7915105936 -45 03 30.231146034 7.05 7.77 7.55 8.70   O8.5Ib-II(f)p 181 0
4 HD 306414 s*b 11 21 46.8237210288 -59 51 47.969821291 10.12 10.69 10.23 10.00   B1Ia 136 0
5 CXOU J162046.2-513006 HXB 16 20 46.2655398336 -51 30 06.046848280   18.9   16.28 13.4 B8IIIe 56 0
6 3FHL J1633.0-4746e HXB 16 32 01.87 -47 52 28.3           O8I 151 3
7 2MASS J16463526-4507045 HXB 16 46 35.2592332854 -45 07 04.609816032   15.2       O9.5Ia 87 1
8 2MASS J16480656-4512068 HXB 16 48 06.56 -45 12 06.8           O8.5Iab 123 2
9 AX J1739.1-3020 HXB 17 39 11.5521531365 -30 20 37.783172824     14.40 13.91   O8.5Iab(f) 142 1
10 IGR J17544-2619 HXB 17 54 25.2724584579 -26 19 52.578788584   14.71 12.94 12.10 10.38 O9Ib 166 0
11 SAX J1818.6-1703 HXB 18 18 37.8990045305 -17 02 47.970872274     17.4 17.4   ~ 96 0
12 [KRL2007b] 332 HXB 18 41 00.43 -05 35 46.5           B1Ib 117 1
13 [KRL2007b] 335 HXB 18 45 01.5 -04 33 58   16.24 14.06 12.71 11.42 O9Ia 78 0
14 IGR J18483-0311 HXB 18 48 17.2064881183 -03 10 16.876608322 23.702 25.162 21.884 17.888 15.88 B0.5Ia 111 0
15 NAME Vela Field reg ~ ~           ~ 156 0

    Equat.    Gal    SGal    Ecl

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2021.03.02-05:55:12

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