A search for X-ray emission from a nearby pulsar: PSR 1929+10

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Emission Spectra, Pulsars, Stellar Luminosity, Stellar Radiation, X Ray Sources, Exosat Satellite, Stellar Activity, Stellar Spectra

Scientific paper

Observations of PSR 1929+10 with EXOSAT are described. In the 0.04 to 2.4 keV range a 2 sigma upper limit of 0.005 cts/sec is obtained. This translates to a luminosity upper limit of L less than or = 2 times 10 to the 29th power ergs/sec for a power-law source with photon number index = 1 to 3, and L less than or = 10 to the 30th power ergs/sec corresponding to T less than or = 190,000 K for a blackbody with radius 10 km. Constraints on the energy dissipation rate inside the neutron star, on polar cap heating, and on the possibility of a compact synchrotron nebula, as well as the consistency of the present upper limits with a previous Einstein Observatory detection are discussed.

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