8860018

This Crab offset staring observation is used to determine the off-axis imaging properties of IBIS and to provide an absolute calibration of the off-axis PSF. The off-axis position of the Crab in this staring observation (zenith 9.6 degree azimuth 0. degree) is defined in the instrumental coordinate system and depends on the start date of the observation. [truncated! Please see actual data for full text]