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Title:
Discovery of X-Ray Pulsations from the Compact Central Source in the Supernova Remnant 3C 58
Authors:
Murray, Stephen S.; Slane, Patrick O.; Seward, Fredrick D.; Ransom, Scott M.; Gaensler, Bryan M.
Affiliation:
AA(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138; ), AB(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138; ), AC(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138; ), AD(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138; ), AE(Center for Space Research, Massachusetts Institute of Technology, 70 Vassar Street, Building 37, Cambridge, MA 02139)
Publication:
The Astrophysical Journal, Volume 568, Issue 1, pp. 226-231. (ApJ Homepage)
Publication Date:
03/2002
Origin:
UCP
ApJ Keywords:
ISM: Individual: Alphanumeric: 3C 58, Stars: Pulsars: Individual: Alphanumeric: PSR J0205+6449, Stars: Neutron, ISM: Supernova Remnants, X-Rays: Stars
DOI:
10.1086/338766
Bibliographic Code:
2002ApJ...568..226M

Abstract

We report on high time and spatial resolution observations of the supernova remnant (SNR) 3C 58 using the High Resolution Camera (HRC) on the Chandra X-Ray Observatory. These data show a pointlike central source from which we detect 65.68 ms pulsations at 6.7 σ significance. We interpret these pulsations as corresponding to a young rotation-powered pulsar, PSR J0205+6449, that is associated with and powers SNR 3C 58. Analysis of archival Rossi X-Ray Timing Explorer (RXTE) data from 3 years earlier confirms these pulsations and allows us to determine a spin-down rate of P=1.93×10-13ss-1. Assuming a magnetic dipole model for PSR J0205+6449, we infer a surface magnetic field of 3.6×1012 G. The historical age for the pulsar (based on its identification with SN 1181) is 820 yr. Taken with the observed period and spin-down rate, we derive an initial spin period of ~60 ms.
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