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Paper: ASC Coordinate Transformation---The Pixlib Library
Volume: 125, Astronomical Data Analysis Software and Systems VI
Page: 473
Authors: He, H.; McDowell, J.; Conroy, M.
Abstract: We describe a coordinate library for AXAF data analysis. The library handles transformations between celestial coordinates and instrumental (mirror, focal plane, detector pixel) coordinate systems. The need for careful transformations is driven by the accuracy of the detectors and the attitude determination system. The coordinate systems are characterized by parameter files generated from experimental and calibration data. Transformation calculations are performed by matrix-representation routines for maximum flexibility. This library is implemented in ANSI C, and uses the SAO IRAF-compatible parameter interface.
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