High-energy observations of the millisecond pulsar PSR J0218+4232

Astronomy and Astrophysics – Astrophysics

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Stars: Neutron, Pulsar: Individual: Psrj0218+4232, Psrb1937+21, Gamma Rays: Observations, X-Rays: General

Scientific paper

The very luminous millisecond binary radio pulsar PSRJ0218+4232 has been detected in soft X-rays, at a luminosity of 8.4x10^32^erg/s between 0.1-2.4keV. The EGRET source 2EGJ0220+4228 has a position which is consistent with that of PSRJ0218+4232. Both the X-ray source and the γ-ray source show indications for variations at the pulse period. If the γ-ray source is indeed the radio pulsar, then the energy loss in γ-rays corresponds to about 10% of the spin-down luminosity. The X-ray luminosity of PSRJ0218+4232 is high, but in line with the luminosity of PSRB1937+21 of ~2.3x10^32^erg/s.

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