2013A&A...558A..99S


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.11CEST19:31:30

2013A&A...558A..99S - Astronomy and Astrophysics, volume 558A, 99-99 (2013/10-1)

The 54-day orbital period of AX J1820.5-1434 unveiled by Swift.

SEGRETO A., LA PAROLA V., CUSUMANO G., D'AI A., MASETTI N. and CAMPANA S.

Abstract (from CDS):

The hard X-ray survey that Swift Burst Alert Telescope (BAT) has been performing since late 2004 provides a considerable database for a large number of sources, whose hard X-ray emission are poorly known. We exploit the BAT survey archive to improve the temporal and spectral characterization of the Galactic hard-X-ray sources. We focus here on the study of the high mass X-ray binary AX J1820.5-1434. All the data relevant to AX J1820.5-1434 were extracted from the BAT survey archive and analyzed using a folding technique to search for periodical modulations. A broad-band spectral analysis was also performed, complementing the BAT spectrum with the available Swift X-Ray Telescope (XRT) and XMM-Newton pointed observations. A timing analysis revealed the detection of a coherent signal at P0=54.0±0.4d, which we interpret as the orbital period of the binary system. When folded with a period of P0, the light curve shows an asymmetric profile with a minimum roughly consistent with zero intensity. The broadband spectral analysis coupling Swift-XRT, XMM-Newton, and Swift-BAT spectra confirms that the source emission is well modeled with a strongly absorbed power law with no evidence of a high energy exponential cutoff.

Abstract Copyright:

Journal keyword(s): X-rays: binaries - X-rays: individuals: AX J1820.5-1434 - stars: neutron

Simbad objects: 7

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Number of rows : 7

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* NP Ser LXB 18 16 01.389 -14 02 10.62   18.8       K 598 2
2 [KRL2007b] 314 HXB 18 20 29.5 -14 34 24           O9.5-B0Ve 55 1
3 2MASS J18203114-1434193 * 18 20 31.1440313041 -14 34 19.351341266           ~ 3 1
4 2MASS J18211975-1318388 HXB 18 21 19.7677353711 -13 18 39.091923453           B0V-O9I 29 0
5 IGR J18219-1347 HXB 18 21 54.82 -13 47 26.7           ~ 12 0
6 IGR J18246-1425 HX? 18 24 28 -14 26.3           Be? 16 0
7 V* V479 Sct HXB 18 26 15.0561532140 -14 50 54.249464136 12.02 12.23 11.27 11.04   ON6V((f))z 492 2

    Equat.    Gal    SGal    Ecl

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2020.07.11-19:31:30

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