Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...464..842m&link_type=abstract
Astrophysical Journal v.464, p.842
Astronomy and Astrophysics
Astronomy
52
Radio Continuum: Stars, Ism: Individual Alphanumeric: G296.5+10.0, Stars: Neutron, Ism: Supernova Remnants, X-Rays: Stars
Scientific paper
We present new X-ray, radio, and optical observations of the unidentified X-ray source 1E 1207.4-5209, which lies at the center of the shell-like supernova remnant G296.5+10.0. On the basis of its high X-ray to optical flux ratio, it had already been suggested that this source is an isolated neutron star associated with the supernova remnant. This is strongly supported by new ROSAT data, which are well fitted with a blackbody spectrum with T ˜ 3 x 106 K, consistent with from a relatively young neutron star (˜104 yr) at the supernova remnant distance of about 1.5 kpc. If confirmed, this would be the second pulsar (after Geminga) not detected at radio wavelengths. Other possible interpretations, involving peculiar low-mass X-ray binaries, are discussed. The alternate possibility that 1E 1207.4-5209 is a BL Lac object is ruled out by a new upper limit of ˜0.1 mJy at 6 cm.
Bignami Giovanni F.
Caraveo Patricia A.
Mereghetti Sandro
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