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ASCA and Bepposax Observations of the Newly Discovered SNR RX J0852-4622The NASA Grant supported analysis of X-ray data from the supernova remnant (SNR) G266.2-1.2, a newly discovered SNR in the direction of Vela. Our observations reveal that the X-ray emission from this remnant is nonthermal, making this the third shell-type SNR for which the X-ray emission is dominated by synchrotron processes. The interpretation is that the SNR is an efficient accelerator of cosmic rays, with direct evidence of electrons at energies approaching 100 TeV. Our spectral analysis indicates a higher absorption than for the Vela SNR, indicating that G266.2-1.2 is more distant. However, we conclude that the lack of high amounts of absorption place the remnant closer than the Vela molecular ridge at a distance of 1-2 kpc. We observe a compact X-ray source at the remnant center, surrounded by diffuse emission, which may be an associated neutron star.
Document ID
20030069041
Acquisition Source
Goddard Space Flight Center
Document Type
Contractor or Grantee Report
Authors
Oliversen, Ronald J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Slane, Patrick
(Smithsonian Astrophysical Observatory Cambridge, MA, United States)
Date Acquired
August 21, 2013
Publication Date
September 1, 2003
Subject Category
Astrophysics
Funding Number(s)
CONTRACT_GRANT: NAG5-9106
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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