Computer Science
Scientific paper
Apr 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005xrrc.proce4.11k&link_type=abstract
"X-Ray and Radio Connections (eds. L.O. Sjouwerman and K.K Dyer) Published electronically by NRAO, http://www.aoc.nrao.edu/event
Computer Science
X-Ray, Radio, Supernova Remnants
Scientific paper
We present X-ray (Chandra and ROSAT HRI and narrow-band optical images of the mixed-morphology supernova remnant W28. We spatially compare these data with VLA maps that have been previously published in the literature. The ROSAT HRI mosaicked image shows the well-known center-filled X-ray morphology, as well as a few sharp filamentary structures. Narrow-band optical images from the Curtis Schmidt telescope at Cerro Tololo International Observatory also reveal complex filamentary structure. There is a relative enhancement of [S2] compared to Hα in the regions of known shock/cloud interactions and the converse is true in the central X-ray emitting region. Our Chandra image details the shape and extent of the central emission, revealing a bright knotty region approximately 5--10 arcminutes in size. The Chandra data also reveal a hard X-ray point source coincident with the southwestern shell. This source is probably unrelated to W28, but it was responsible for the spectral variations previously observed by ASCA.
Borkowski Kazimierz J.
Keohane Jonathan W.
Pannuti Thomas G.
Rho Jeonghee
Winklery P. F.
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