XMM-Newton Science Analysis System


evigweight (evigweight-1.6) [xmmsas_20070308_1802-6.6.0]

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Developer's notes

Two coordinate conversions are required to perform the operation:

• From detector coordinates (DETX, DETY), present in the event list, to the angles $\theta, \phi$ used by CAL_getEffectiveArea or CAL_getFilterTransmission. This is done by first converting into mm (using the pixel size in the TCDLT keywords and the focal length from CAL_getMiscellaneousData), then into angles (using CAL_camCoord2ToTelCoord).
• From angles (0,0 at the center of the field of view) into CCD coordinates (RAWX, RAWY), used by CAL_getQuantumEfficiency. This is done by calling in sequence CAL_telCoordToCamCoord2, CAL_camCoord2ToCamCoord1 and CAL_camCoord1ToChipCoord.