Distinguishing Models for ACIS Data of Diffuse Emission

Details Distinguishing Models for ACIS Data of Diffuse Emission Distinguishing Models for ACIS Data of Diffuse Emission

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13..678l&link_type=abstract

Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 July

Astronomy and Astrophysics

Astronomy

Scientific paper

Discussed here is the issue of discriminating different spectral models for diffuse emission observations with the Chandra ACIS. Standards models such as non-ionization equilibrium and ionization equilibrium models and models with different metal abundances are considered. The datasets used are from Chandra ACIS observations of diffuse emission in particular of the Cygnus Loop supernova remnant. A bright region on the south- western limb is seen in ROSAT PSPC observations of the Cygnus Loop with a high hardness ratio filament directly adjacent to a low hardness ratio filament. This region was observed with the Chandra ACIS with a field that was able to cover both filaments using the ACIS CCDs I0 I1 I2 I3. The region was divided into several sub-regions for modelling of the diffuse emission spectrum.
This work supported by the Natural Sciences and Engineering Research Council of Canada.

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