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Record Details

Record 1 of 7744
Resolving the Crab Nebula with Direct Hard X-Ray Imaging
Author and Affiliation:
Swartz, Douglas A.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Ramsey, Brian D.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Tennant, Allyn F.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Dietz, Kurtis L.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Apple, Jeff A.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Gaskin, Jessica A.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Weisskopf, Martin(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Abstract: 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 approx.25 keV and below the mirror graze angle cutoff at approx.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.
Publication Date: Mar 31, 2008
Document ID:
20080023406
(Acquired Jul 10, 2008)
Subject Category: ASTRONOMY
Document Type: Conference Paper
Meeting Information: High Energy Astrophysics Division (HEAD) Meeting of the American Astronomical Society; 31 Mar. - 3 Apr. 2008; Los Angeles, CA; United States
Financial Sponsor: NASA Marshall Space Flight Center; Huntsville, AL, United States
Organization Source: NASA Marshall Space Flight Center; Huntsville, AL, United States
Description: 1p; In English; Original contains black and white illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: CRAB NEBULA; X RAY IMAGERY; PULSARS; TORUSES; RESOLUTION; ENERGY BANDS; ELONGATION; AUGMENTATION; SPECTRA
Availability Source: Other Sources
Availability Notes: Abstract Only
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