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Discovery of X-Ray Emission from the Crab Pulsar at Pulse MinimumThe Chandra X-ray Observatory observed the Crab Nebula and Pulsar using the Low-Energy Transmission Grating (LETG) with the High-Resolution Camera (HRC). 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(sub infinity) < 2.1 MK) on the surface temperature of the underlying neutron star. In addition, analysis of the pulse profile appears to confirm the absolute timing of the Observatory to within about 0.2 ms.
Document ID
20010038729
Acquisition Source
Marshall Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Tennant, Allyn F.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Becker, Werner
(Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Juda, Michael X.
(Smithsonian Astrophysical Observatory Cambridge, MA United States)
Elsner, Ronald F.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Kolodziejczak, Jeffery J.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Murray, Stephen S.
(Smithsonian Astrophysical Observatory Cambridge, MA United States)
ODell, Stephen L.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Paerels, Frits
(Columbia Univ. New York, NY United States)
Swartz, Douglas A.
(Universities Space Research Association Huntsville, AL United States)
Shibazaki, Noriaki
(Rikkyo Univ. Tokyo, Japan)
Weisskopf, Martin C.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Rose, M. Franklin
Date Acquired
August 20, 2013
Publication Date
January 1, 1999
Subject Category
Space Radiation
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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