Two Young Radio Pulsars Coincident with EGRET Sources

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Abstract

We report the discovery and follow-up timing observations of two young energetic radio pulsars. PSR J1420-6048 has a period P = 68 ms and period derivative (P) over dot = 83 x 10(-15), implying a characteristic age tau (c) = 13 kyr and a surface dipole magnetic field strength B = 2.4 x 10(12) G. PSR J1837-0604 has P = 96 ms and (P) over dot = 45 x 10(-15), implying tau (c) = 34 kyr and B = 2.1 x 10(12) G. The two objects have large spin-down luminosities, and, on the basis of an empirical comparison of their properties with those of other young radio pulsars, they are expected to be observable as pulsed gamma -ray sources. In fact, they lie within the error circles of gamma -ray sources detected by the EGRET instrument on the Gamma Ray Observatory. We show that the pulsars are plausibly associated with the EGRET sources.

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