Abstract
SSM onboard AstroSat is designed to monitor X-ray sky in the energy range 2.5–10 keV to detect and locate X-ray sources in outburst. SSM with its three almost identical 1D-proportional counters mounted on a rotating platform, scans the sky in step and stare mode of operation. It observes the X-ray sky and generates light curves for X-ray sources detected. Here, we discuss the positional calibration to carry out imaging with SSM. Onboard calibration of SSM has been carried out with Crab, the standard X-ray source. SSM observations of Crab are compared with that of MAXI on ISS for cross calibration of the instrument.
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Acknowledgements
The authors acknowledge Director, URSC and DD, PDMSA and GH, SAG for the constant support and also acknowledge various entities at ISRO who have contributed their part towards realization of all aspects of the instrument.
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This article is part of the Special Issue on “AstroSat: Five Years in Orbit”.
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Sarwade, A.R., Ramadevi, M.C., Ravishankar, B.T. et al. Calibration of Scanning Sky Monitor (SSM) onboard AstroSat. J Astrophys Astron 42, 70 (2021). https://doi.org/10.1007/s12036-021-09765-9
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DOI: https://doi.org/10.1007/s12036-021-09765-9