A Deep ROSAT HRI Image of Cassiopeia A

Details A Deep ROSAT HRI Image of Cassiopeia A A Deep ROSAT HRI Image of Cassiopeia A

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...190.4401k&link_type=abstract

American Astronomical Society, 190th AAS Meeting, #44.01; Bulletin of the American Astronomical Society, Vol. 29, p.839

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a new, deep (232 ks) ROSAT HRI exposure of Cas-A. This is the first X-ray image with enough photons to measure the outer, low surface brightness, shell of emission seen in the radio band. In addition 5 iterations of the Lucy-Richardson algorithm were used to deconvolve out the wings of the X-ray mirror point spread function, thus creating a image with a ``restored beam'' of 2.2" FWHM. These new data show a striking resemblance to the VLA radio continuum outside of the main shell. They clearly show the northern and southwestern radio features and the eastern jet region.

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