XMM-Newton observation of M101 ULX-1

Astronomy and Astrophysics – Astronomy

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X-Ray, Binaries, Black Holes, Variables

Scientific paper

We report XMM-Newton TOO observation of the recent outburst of M101 ULX-1 (CXOU J140332.3+542103; ATEL #374). The observation was taken on 8 January 2005 with an exposure time of 32 ks. With about 20 ks useful data, there are about 1200 counts in EPIC-pn for spectral fitting. The spectrum is very soft and there is no significant X-ray emission above 1 keV. The spectrum has a peak at around 0.4-0.5 keV and can be fitted with an absorbed blackbody model (N_H=1.9e21 cm^-2, kT=56 eV).

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