Revealing the spin period of the isolated neutron star RX J1605.3+3249

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Supernovae, Supernova Remnants, Diffuse (Galactic) Emission And Isolated Neutron Stars, Rx J1605.3+3249

Scientific paper

From archival XMM-Newton data of the isolated neutron star RX J1605.3+3249 we found a candidate (2.5 sigma) period for the star's rotation of 6.88 s. We propose a 56 ks observation to confirm this. The observation will also allow us to verify the existence of a narrow absorption line at 0.58 keV reported from the RGS spectrum (van Kerkwijk et al. 2004). If both, the suggested spin period and the narrow absorption line can be confirmed, RX J1605.3+3249 becomes a potential candidate among the ROSAT discovered isolated neutron stars with thermal X-ray spectrum to measure independently the mass and radius of the star. This would yield important constraints on the equation of state of matter in neutron stars.

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