ASTROSAT Science Goals
ASTROSAT has a variety of science goals. In addition to simultaneous multiwavelength monitoring of variable sources, many other science programmes have been planned and new areas are being discussed. A glimpse of some of the key science involving various instruments may be found in the following:


Announcement of Opportunity         
Proposal opportunity for observing with ASTROSAT will be announced shortly after launch and initial verification of instrument performance. Proposals will be peer-reviwed and the final decision on time allocation will be made by the Astrosat Time Allocation Committee (ATAC). Observations for Announced Opportunity (AO) Cycle 1 will begin one year after the launch of ASTROSAT. The observing time will be divided in the following manner:
0-6 months: PV (Performance Verification)              6-12 months: GTO (Guaranteed Time Observation)

Year 2: AO (India) 35%                                                            GTO 50%
Year 3: AO (India) 45%                   AO (World) 10%                 GTO 30%
Year 4: AO (India) 65%                   AO (World) 20%

Reserved time: Canadian Space Agency 5%, University of Leicester 3%, Target Of Opportunity (for serendipitous sources) 5%, Calibration 2% throughout the mission


Proposal assistance tools
Please visit this page for updates regarding Exposure Time Calculators, Response Matrices and Mission Simulators.
Online Exposure Time Calculators for UVIT are currently served from CALGARY and IIAP . A UVIT imaging simulator package (1.5MB) is downloadable, along with a manual (0.3MB) and sample images (17MB).
A command-line PIMMS package (preliminary version) for the X-ray instruments is available for download:

Also available are Preliminary response files for the co-pointed X-ray instruments.

Data Archive access
Access to ASTROSAT data archive will be provided through this site. Data will be access controlled according to the prevailing lock-in policy. Data rights will normally reside with the proposal PI for 18 months after validated data enters the archive.