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.
Two young radio pulsars coincident with EGRET sources
D'AMICO, NICOLO';
2001-01-01
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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