Low Energy Calibration of Chandra/ACIS-S and the Diffuse X-ray Background

Details Low Energy Calibration of Chandra/ACIS-S and the Diffuse X-ray Background Low Energy Calibration of Chandra/ACIS-S and the Diffuse X-ray Background

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000head....5.3222e&link_type=abstract

American Astronomical Society, HEAD Meeting #5, #32.22; Bulletin of the American Astronomical Society, Vol. 32, p.1239

Astronomy and Astrophysics

Astronomy

Scientific paper

We present details of the reduction of the data, and calibration of the Chandra ACIS-S back-illuminated devices needed to interpret them, of a 100 ks observation of MBM 12, a nearby (d = 58--90 pc) molecular cloud. Snowden, McCammon & Verter (1993) used deep ROSAT PSPC observations of this cloud to measure the foreground 1/4 keV band emission from the Local Bubble. They also put strong upper limits on the foreground 0.5--1.0 keV band emission. Most, if not all, models for the Local Bubble predict that the emission in this bandpass is primarily due to O VII and O VIII lines. We report improvements to the calibration of the ACIS-S back-illuminated devices (S3 and S1) we have made to the energy scale, the quantum efficiency, and the background modeling which were needed for this analysis. This work was funded by NASA contract NAS8-39073.

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