Is Calvera riding against the Magnificent Seven?

Details Is Calvera riding against the Magnificent Seven? Is Calvera riding against the Magnificent Seven?

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop...27z&link_type=abstract

XMM-Newton Proposal ID #06011801

Computer Science

Supernovae, Supernova Remnants, Diffuse (Galactic) Emission And Isolated Neutron Stars, 1Rxs J141256+79

Scientific paper

Recent Chandra, Swift and Gemini observations of 1RXS J141256.0+792204 suggest that it is a new Isolated Neutron Star (INS). However, the INS nature of this source, dubbed Calvera, relies only on its large X-ray-to-optical flux ratio. An identification with an X-ray dim INS or a magnetar seems unlikely while that with a Compact Central Object or an old solitary ms-pulsar appears more plausible. Here we propose a 28 ks observation to obtain the first high-quality X-ray spectrum of Calvera and to perform an accurate timing analysis. The new X-ray data will clarify whether Calvera is an ordinary member of one of the already known INS classes or, more intriguing, if it is one of the long sought missing links required to unify the different INS classes in a common scenario.

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