2009A&A...508..889R


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.21CEST03:54:36

2009A&A...508..889R - Astronomy and Astrophysics, volume 508, 889-894 (2009/12-3)

The nature of the X-ray binary IGR J19294+1816 from INTEGRAL, RXTE, and Swift observations.

RODRIGUEZ J., TOMSICK J.A., BODAGHEE A., ZURITA HERAS J.-A., CHATY S., PAIZIS A. and CORBEL S.

Abstract (from CDS):

We report the results of a high-energy multi-instrumental campaign with INTEGRAL, RXTE, and Swift of the recently discovered INTEGRAL source IGR J19294+1816. The Swift/XRT data allow us to refine the position of the source to RAJ2000=19:29:55.9 DecJ2000=+18:18"38.4 (±3.5"), which in turn permits us to identify a candidate infrared counterpart. The Swift and RXTE spectra are well fitted with absorbed power laws with hard (Γ∼1) photon indices. During the longest Swift observation, we obtained evidence of absorption in true excess to the Galactic value, which may indicate some intrinsic absorption in this source. We detected a strong (P=40%) pulsation at 12.43781 (±0.00003)s that we interpret as the spin period of a pulsar. All these results, coupled with the possible 117 day orbital period, point to IGR J19294+1816 being an HMXB with a Be companion star. However, while the long-term INTEGRAL/IBIS/ISGRI 18-40 keV light curve shows that the source spends most of its time in an undetectable state, we detect occurrences of short (∼2000-3000s) and intense flares that are more typical of supergiant fast X-ray transients. We therefore cannot make firm conclusions on the type of system, and we discuss the possible implications of IGR J19294+1816 being an SFXT.

Abstract Copyright:

Journal keyword(s): X-rays: binaries - accretion, accretion disks - stars: individual: IGR J19294+1816 - stars: individual: IGR J11215-5952 - stars: individual: IGR J18483-0311

Simbad objects: 9

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Number of rows : 9

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 RX J0111.2-7317 HXB 01 11 08.5772485083 -73 16 46.307693953 14.40 15.42 15.52   15.29 B0.5-1Ve 71 0
2 HD 306414 s*b 11 21 46.8237210288 -59 51 47.969821291 10.12 10.69 10.23 10.00   B1Ia 137 0
3 3FHL J1633.0-4746e HXB 16 32 01.87 -47 52 28.3           O8I 151 3
4 V* KZ TrA LXB 16 32 16.79 -67 27 39.3 17.40 18.60 18.5     ~ 535 1
5 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
6 INTEGRAL1 111 HXB 19 14 04.2269997048 +09 52 58.398334234   18.6 16.4     B0.5I 89 0
7 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2361 0
8 IGR J19294+1816 HXB 19 29 55.9035072710 +18 18 38.226053335           B1Ve 31 1
9 NAME Galactic Ridge ? ~ ~           ~ 444 1

    Equat.    Gal    SGal    Ecl

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