X-ray follow-up to identify faint X-ray transients

Physics

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White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Igrj18175-1530, Igrj17062-6143, Xtej1637-489, Igrj17379-3747, Xtej1734-234

Scientific paper

We propose to trigger a maximum of 2 XMM follow-up observations on known transient sources discovered with INTEGRAL and RXTE, if they undergo a new outburst. We ask for 30 ks per observation,to get a high-quality X-ray spectrum and search for X-ray pulsations and/or bursts. The identification of the sources we are proposing here is particularly important because the selected targets are suspected to belong to the class of Very Faint X-ray Transients (VFXTs), X-ray binaries with outburst peak luminosities of 1E34-1E36 erg/s, thought to be the faintest known accretors, with still poorly understood mechanism for their subluminous outbursts.

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