Unveiling the nature of RX J0002+6246 with XMM-Newton

Details Unveiling the nature of RX J0002+6246 with XMM-Newton Unveiling the nature of RX J0002+6246 with XMM-Newton

2007-11-06

arxiv.org/abs/0711.0827v1

MNRAS, Volume 384, Issue 1, pp. 225-229 (2008)

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures and 1 table. Accepted for publication in Monthly Notices of the Royal Astronomical Society Main Journal

Scientific paper

10.1111/j.1365-2966.2007.12677.x

The X-ray source RX J0002+6246 was discovered close to the supernova remnant CTB1 in a ROSAT observation performed in 1992. The source phenomenology (soft spectrum, apparent lack of counterparts, possible pulsations at 242 ms, hints for surrounding diffuse emission) led to interpret it as an isolated neutron star in a new supernova remnant. We have analysed an archival XMM-Newton observation performed in 2001. The source coordinates, as computed on the XMM-Newton images, coincide with those of a bright source listed in optical and infrared catalogues. The X-ray spectrum is well described by an optically thin plasma model. No fast pulsations are seen, nor clear evidence of a supernova remnant associated to the source. Thus, we conclude that RX J0002+6246 is not an isolated neutron star, but the X-ray counterpart of the bright optical/infrared source, most likely a F7 spectral class star located at about 0.2 kpc.

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