Query : 2011A&A...529A..30D

2011A&A...529A..30D - Astronomy and Astrophysics, volume 529A, 30-30 (2011/5-1)

The Swift-BAT survey reveals the orbital period of three high-mass X-ray binaries.


Abstract (from CDS):

A growing number of previously hidden Galactic X-ray sources are now detected with recent surveys performed by the INTEGRAL and Swift satellites. Most of these new sources eluded past surveys due to their large local X-ray extinction and consequent low soft X-ray flux. The Swift-BAT performs daily monitoring of the sky in an energy band (15-150keV) which is only marginally affected by X-ray extinction, thus allowing for the search of long periodicities in the light curve and identification of the nature of the X-ray sources. We performed a period search using the folding technique in the Swift-BAT light curves of three INTEGRAL sources: IGRJ05007-7047, IGRJ13186-6257 and IGRJ17354-3255. Their periodograms show significant peaks at 30.77±0.01d, 19.99±0.01d and 8.448±0.002d, respectively. We estimate the significance of these features from the χ2 distribution of all the trials, finding a probability ≤1.5x10–4 that the detections occurred due to chance. We complement our analysis with the study of their broadband X-ray emission. We identify the periodicities with the orbital periods of the sources. The periods are typical for the wind accretors X-ray binaries and we support this identification showing that also their energy spectra are compatible with an X-ray spectral emission characteristic of high-mass X-ray binaries. The spectrum of IGRJ05007-704 that resides in the Large Magellanic Cloud, does not show any intrinsic local absorption, whereas the spectra of the Galactic sources IGRJ17354-3255 and IGRJ13186-6257 may be affected by a local absorber. The folded light curve for IGRJ13186-6257 suggests a possible Be companion star.

Abstract Copyright:

Journal keyword(s): X-rays: binaries - X-rays: individuals: IGRJ05007-7047 - X-rays: individuals: IGRJ13186-6257 - X-rays: individuals: IGRJ17354-3255

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 OGLE LMC130.4 19472 HXB 05 00 46.0548726168 -70 44 36.054234204   14.92       O9Ve 33 0
2 IGR J05009-7044 gam 05 00 59 -70 44.7           ~ 4 0
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17000 1
4 IGR J13186-6257 HX? 13 18 25.05456 -62 58 15.6720           ~ 19 0
5 AGL J1734-3310 gam 17 34 44.0 -33 10 38           ~ 15 1
6 IGR J17354-3255 HX? 17 35 27.6058982616 -32 55 54.425912052           O9Iab 49 2
7 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13915 0
8 NAME Galactic Bulge reg ~ ~           ~ 4174 0

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