The supergiant fast X-ray transient IGR J18483−0311 in quiescence: XMM–Newton, Swift and Chandra observations |
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| Authors: | A. Giunta E. Bozzo F. Bernardini G. Israel L. Stella M. Falanga S. Campana A. Bazzano A. J. Dean M. Mendez |
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| Affiliation: | INAF - Osservatorio Astronomico di Roma, Via Frascati 33, 00044 Rome, Italy;Dipartimento di Fisica - Universitàdi Roma Tor Vergata, via della Ricerca Scientifica 1, 00133 Rome, Italy;ISDC, Geneva Observatory, University of Geneva, Chemin d'Ecogia 16, CH-1290 Versoix, Switzerland;ISSI, Hallerstrasse 6, CH-3012 Bern, Switzerland;INAF Osservatorio Astronomico di Brera, via Emilio Bianchi 46, I-23807 Merate (LC), Italy;INAF - IASF, Via del Fosso del Cavaliere 100, 00133 Roma, Italy;School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ;Kapteyn Astronomical Institute, University of Groningen, PO Box 800, 9700 AV Groningen, the Netherlands |
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| Abstract: | IGR J18483−0311 was discovered with INTEGRAL in 2003 and later classified as a supergiant fast X-ray transient. It was observed in outburst many times, but its quiescent state is still poorly known. Here, we present the results of XMM–Newton , Swift and Chandra observations of IGR J18483−0311. These data improved the X-ray position of the source, and provided new information on the timing and spectral properties of IGR J18483−0311 in quiescence. We report the detection of pulsations in the quiescent X-ray emission of this source, and give for the first time a measurement of the spin-period derivative of this source. In IGR J18483−0311, the measured spin-period derivative of −(1.3 ± 0.3) × 10−9 s s−1 likely results from light travel time effects in the binary. We compare the most recent observational results of IGR J18483−0311 and SAX J1818.6−1703, the two supergiant fast X-ray transients for which a similar orbital period has been measured. |
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| Keywords: | stars: individual: IGR J18483−0311 stars: individual: SAX J1818.6−1703 stars: neutron X-rays: binaries X-rays: stars |
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