Accreting millisecond NS transients in quiescence: the case of IGR J0029+5934

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White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Igr J00291+5934, Xmm-Newton Proposal 05053901

Scientific paper

IGR 0029+5934 is the 6th transient accreting millisecond X--ray pulsar (TAMP) discovered. In outburst and in quiescence TAMP are peculiar, showing faint outbursts, weaker quiescent luminosities and (when detected) lack of the soft component usually observed in other quiescent transients. Here we propose to observe the newly discovered IGR J00291+5934. This source is the fastest TAMP with a spin period of 599 Hz (and an orbital period of 2.5 hr). This source has been observed in quiescence following during its return to quiescence thank to a Chandra DDT proposal. These observations in quiescence found the source at different luminosity levels. Here we ask for three observations to investigate this variability, aiming at disentangling power law versus black body variations.

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