5. Data processing, data rights and publication

After the completion of observation, the raw data received will be converted to Level-1 data at Indian Space Science Data Center (ISSDC).  ISSDC is responsible for governing the ingest, Quick look Display (QLD), processing (for level-0/1), archival (all levels, along with the auxiliary data) and dissemination of payload data.   The data will be in standard FITS format.

Level-1 data can be downloaded from the ISSDC website by the payload teams or Principal Investigators (PIs) of the proposals for science analysis as well as to produce higher level data products. Sample data, software and utilities are provided in the ASC website.

The PI will be informed, after the completion of successful observation for the downloading of processed Level-1 data. The standard pipeline software from Level-1 to Level-2 and any other higher level standard products will be made available to the Guest Observers proposers through ISSDC website.

5.1       Proprietary period                                                                                

There shall be a Proprietary period associated with observational data from all AstroSat instruments and in all phases and years after launch. This "proprietary period" would begin from the date the Level-1 data is made available to the payload teams and /or PIs of AO proposal.

During this proprietary period, the data will NOT BE USED by any persons or teams other than those who submitted the proposal(s) for the observations, except in cases where the proposers or PI themselves involve such other persons.

The proprietary period for AO cycle data is 12 months. After the proprietary period, all data will be kept in ISSDC public archive which is accessible both nationally and internationally.  It is the responsibility of the Payload Operation Centres (POCs) to provide Level-2 products with a quality report to ISSDC.

Target of Opportunity (ToO) observations which are taken from ToO observation time will be processed immediately to Level 1 data and will be placed in ISSDC archive.  These data are non-proprietary and are open to public immediately after observation. 

 5.2      Data rights & obligations

The Principal Investigators (PIs) of all the proposals will have exclusive rights to all the data from all the co-aligned instruments (namely LAXPC, CZTI, SXT and twin telescope UVIT) for those fields that are observed with AstroSat against their proposals, unless they forgo this right by allowing piggy back setting.

Data rights for other objects detected within the observed field of observation also belong to the PI of the proposal, unless they communicate not to have it.  At present there is no way to separate target data and field data.  The proposal PI may collaborate with payload teams (and vice versa) for analysis of data on field objects other than primary target.

Proposal PI can relinquish the data rights from other instruments if he/she does not want to use it, by not configuring those payloads. This will allow for piggy back setting by payload teams.  Such data will be provided to the payload teams and proprietary period remains the same as AO proposal.

Any instrument team or PI has the right to reduce the proprietary period by sending an email to with cc to ISSDC team ( recommending for placing the data in ISSDC data archive before the end of the proprietary period. 

5.3       Publication

The proposers /guest observers shall make available the salient results of the data analysis to the scientific community through publication in appropriate journals.

All the publications shall acknowledge the AstroSat data, by including a phrase “AstroSat -along with the name of the payload(s)” whose data is used for analysis/ interpretation in the abstract.

When publishing a paper using AstroSat data, please include the following acknowledgement.

“This publication uses the data from the AstroSat mission of the Indian Space Research Organisation (ISRO), archived at the Indian Space Science Data Centre (ISSDC)”.

If a user has used already published AstroSat results and carried out further interpretation or modeling, the following statement may be included in the acknowledgement.

“The research is based (partially or to a significant extent) on the results obtained from the AstroSat mission of the Indian Space Research Organisation (ISRO), archived at the Indian Space Science Data Centre (ISSDC)”.

ISRO may use any/all results that are derived from AstroSat data and published through academic papers in journals or any other publications by the user, for its own use, in its reports and publications with due reference/ acknowledgements  to such journals and publications.