29th Annual Report (2016-17)

ASSC members conducting LAXPC analysis session at the workshop on "Data Analysis and LAXPC Science", TIFR. CZTI PayloadOperationCentre The Cadmium Zinc Telluride Imager (CZTI) is one of the five science payloads aboardAstroSat. The CZTI Payload Operation Centre (POC) hosted by IUCAA examines all the data received from this payload by the ground station and generates science products from them. The POC is also tasked with monitoring the health of the payload, carrying out periodic calibrations, commanding the payload as andwhen needed as well as the development andmaintenance of the payload data analysis pipeline software and calibration database. Ever since the switch on of the CZTI payload on October 6, 2015, the POC has worked non-stop round the clock to fulfil its designated functions and to provide CZTI data products toAstroSat archives for all users. CZTI POC has achieved the quickest turn-around time for data products among all of the AstroSat payloads, and was also the first to release fully functional analysis software for users. The POC has developed a large amount of custom software for automated, accurate and quick analysis of the CZTI data stream. The analysis activity continues to run on a 24 x 7 basis, with supervisorymanual monitoring provided by the POC personnel. Young trainees are inducted for one-year internships in this activity and provided the necessary training in SpaceAstronomy data analysis and software development. Three trainees have successfully completed their one-year tenure, and one trainee is currently working at the POC alongsidemore experiencedmembers. Another activity that the POC is involved in is to look for high energy transient events in the CZTI data. The most common events of this variety are gamma ray bursts (GRB). DuringApril 2016 –March 2017, the POC has detected and reported 69 GRB events from the CZTI data. The CZTI POC also looked for high energy transient events associated with GravitationalWave detections, and have placed upper limits on their electromagnetic brightness. 128