Discovery of X-Ray Emission from the Crab Pulsar at Pulse Minimum

Allyn F. Tennant, Werner Becker, Michael Juda, Ronald F. Elsner, Jeffery J. Kolodziejczak, Stephen S. Murray, Stephen L. O'Dell, Frits Paerels, Douglas A. Swartz, Noriaki Shibazaki, Martin C. Weisskopf
2001 Astrophysical Journal  
The Chandra X-Ray Observatory observed the Crab pulsar using the Low-Energy Transmission Grating with the High-Resolution Camera. Time-resolved zeroth-order images reveal that the pulsar emits X-rays at all pulse phases. Analysis of the flux at minimum-most likely nonthermal in origin-places an upper limit (T ! ϱ ) on the surface temperature of the underlying neutron star. In addition, analysis of the pulse profile 2.1 MK establishes that the error in the Chandra-determined absolute time is
more » ... bsolute time is quite small, Ϫ . 0.2 ‫ע‬ 0.1 ms
doi:10.1086/321718 fatcat:haixbv3k7zbjtj2q6jwbepzv2e