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The US INTEGRAL Public Data Archive

The US INTEGRAL Public Data Archive. INTEGRAL Archive Milestones. July 2004: The ISDC INTEGRAL Public Data Archive opened with data up to revolution 66 (5-1-03). September 2004: The US INTEGRAL Public Data Archive at the HEASARC opened.

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The US INTEGRAL Public Data Archive

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  1. The US INTEGRAL Public Data Archive INTEGRAL User’s Committee Meeting 7-15-05

  2. INTEGRAL Archive Milestones July 2004: The ISDC INTEGRAL Public Data Archive opened with data up to revolution 66 (5-1-03). September 2004: The US INTEGRAL Public Data Archive at the HEASARC opened. January 2005: All public data was reprocessed into revision 2 format. January 2005: New GO and CP data released in revision 2. February 2005: The US INTEGRAL Public Data Archive at the HEASARC switches over to revision 2 format data. March 2005: All data available from ISDC in revision 2 format. INTEGRAL User’s Committee Meeting 7-15-05

  3. Revision 2 Changes The main differences between revision 1 and 2 are: • a simplified directory and file structure • the availability of event time stamps in Julian Dates (JD), with corrected energies, standard good time intervals (GTIs) and deadtime in the science window datasets • the event files are now in the standard OGIP format as adopted for other high-energy missions • all JD time stamps are now corrected for the various offsets described in Table 2 and 3 of Walter et al, 2003, A&A 411, L25. • some optimization of the attitude handling have now been implemented • some statistical products created for the purpose of the instrument monitoring have been removed INTEGRAL User’s Committee Meeting 7-15-05

  4. Current Public Data Archive Status • New public data is available to the community within a few days of its release from the ISDC. The limiting factor is the low data transfer rate from the ISDC (only a factor of a few better than real time). • All public data through the latest release (6-17) is currently available from the HEASARC archive. • Public data releases occur ~monthly with the next releases scheduled for 7-22 and 8-8. INTEGRAL User’s Committee Meeting 7-15-05

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  6. Accessing the US INTEGRAL Public Data Archive • The US INTEGRAL Public Data Archive is accessible from the HEASARC via Browse or FTP. • Accessing the data via Browse is complicated by the large size of the typical observation, 3 days of data = 7-8 GB. • The HEASARC limit for a tar file is ~3.5 GB ==> the preferred download method is via a wget script created by Browse. • A detailed description of all the INTEGRAL catalogs available through Browse as well as a detailed cookbook describing the downloading of data and the setting up of a local data repository are available on the GOF website: http://heasarc.gsfc.nasa.gov/docs/integral/inthp_archive.html INTEGRAL User’s Committee Meeting 7-15-05

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  15. Archive Usage Statistics March: 60.0 GB April: 23.5 GB May: 9.8 GB June: 36.0 GB ------------------------------------------------- Average: 32.3 GB INTEGRAL User’s Committee Meeting 7-15-05

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