Physics – Optics
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.5203g&link_type=abstract
American Astronomical Society, 191st AAS Meeting, #52.03; Bulletin of the American Astronomical Society, Vol. 29, p.1300
Physics
Optics
Scientific paper
The Advanced X-ray Astronomy Facility (AXAF) is scheduled for Shuttle launch in late August of 1998. X-ray ground calibration measurements of the High Resolution Mirror Assembly (HRMA) have recently been completed and the calibration analysis is under way. These measurements are used to calibrate a high fidelity raytrace model of the optics from which the on-orbit performance can be assessed. A preliminary characterization of the on-orbit off-axis imaging properties of the AXAF HRMA is presented. We report on small azimuthal asymetries in the off-axis effective area which results from a slight decentering of the mirror pairs. The energy dependence of the off-axis vignetting is assessed. The image morphology is discussed. We also present the results of preliminary investigations into optimizing detection of off-axis sources.
David Laurence P.
Fruscione Antonella
Gaetz Terrance J.
Schwartz Dana A.
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