Resolving the Crab Nebula with Direct Hard X-ray Imaging

Details Resolving the Crab Nebula with Direct Hard X-ray Imaging Resolving the Crab Nebula with Direct Hard X-ray Imaging

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008head...10.3106s&link_type=abstract

American Astronomical Society, HEAD meeting #10, #31.06

Astronomy and Astrophysics

Astronomy

Scientific paper

We report the first direct hard (25--60 keV) X-ray imaging observation of the Crab Nebula that resolves structure to approximately 0.25 pc. The observation was performed over a 1.4 hour period during a balloon flight from Ft. Sumner, NM, on 2007 May 27. The source was detected in the energy band above the atmospheric cutoff at 25 keV and below the mirror graze angle cutoff at 60 keV. The image shows elongation about 25 degrees E of N in the direction along the plane of the torus (and perpendicular to the jet axis) with a slight surface-brightness enhancement NE of the pulsar. The spectrum within a 1.7 arcminute radius region centered on the Crab pulsar can be fitted with a Gamma=2 power law absorbed by an atmospheric column consistent with the balloon altitude at the time of observation.

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