SIMBAD references

2013A&A...556A..72D - Astronomy and Astrophysics, volume 556A, 72-72 (2013/8-1)

Swift/XRT orbital monitoring of the candidate supergiant fast X-ray transient IGR J17354-3255.

DUCCI L., ROMANO P., ESPOSITO P., BOZZO E., KRIMM H.A., VERCELLONE S., MANGANO V. and KENNEA J.A.

Abstract (from CDS):

We report on the Swift/X-ray Telescope (XRT) monitoring of the field of view around the candidate supergiant fast X-ray transient (SFXT) IGR J17354-3255, which is positionally associated with the AGILE/GRID gamma-ray transient AGL J1734-3310. Our observations, which cover 11-days for a total on-source exposure of ∼24ks, span 1.2 orbital periods (Porb=8.4474d) and are the first sensitive monitoring of this source in the soft X-rays. These new data allow us to exploit the timing variability properties of the sources in the field to unambiguously identify the soft X-ray counterpart of IGR J17354-3255. The soft X-ray light curve shows a moderate orbital modulation and a dip. We investigated the nature of the dip by comparing the X-ray light curve with the prediction of the Bondi-Hoyle-Lyttleton accretion theory, assuming both spherical and nonspherical symmetry of the outflow from the donor star. We found that the dip cannot be explained with the X-ray orbital modulation. We propose that an eclipse or the onset of a gated mechanism is the most likely explanation for the observed light curve.

Abstract Copyright:

Journal keyword(s): X-rays: binaries - stars: individual: IGR J17354-3255

Simbad objects: 9

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2020.09.26-21:50:26

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