Observing proposals are invited in response to the Announcement of Opportunity (AO) for open time Cycle A04 and guaranteed time Cycle G08. This announcement will cover one year observing period from October 2017 to September 2018. The one year cycle is open for proposers from various institutes all over the world. The allocation of observing time will be divided as follows: Open (Indian) 45%, Open (International) 10%, GT (instrument teams) 30%, CSA 5%, UoL 3%, Target of Opportunity 5%, Calibration 2%. Final selection of submitted proposals will be based on peer review by the AstroSat Time Allocation Committee (ATAC).

  Open time cycle (A04) Timeline
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  Announcement of Opportunity  : 6 May 2017
  Proposal submission deadline : 7 June 2017, 16:00 Hrs IST ( 10:30 UT )
  ATAC approved proposals      :   Mid August 2017
  Proposal revision  phase     :   Late August 2017
  Observing period             : October 2017 - September 2018    
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  Guaranteed Time Cycle (G08) Timeline
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  Announcement of Opportunity  : 6 May 2017
  Proposal submission deadline : 31 May 2017 (4PM IST)
  ATAC approved proposals      :  June 2017 (third week)
  Proposal revision  phase     :  June 2017 (last week)
  Observing period             : October 2017 - September 2018    
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