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INTEGRAL Guest Observer Facility

Integral mission status updates, instrument performance, guest observer program, data volume challenges, and software and database issues.

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INTEGRAL Guest Observer Facility

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  1. INTEGRAL Guest Observer Facility • Successful Launch 10/17/02, desired 3-day elliptical orbit achieved • Primary instruments performing nominally • SPI Ge detector resolution up to spec • Problems: • JEM-X anode failures, gain voltage lowered (cut off at ~4.5 keV) • 1 telescope in use (~50% of pre-launch efficiency) • High background rates for SPI, IBIS • some event-data modes not always available Mission, Overview, Status:

  2. INTEGRAL Guest Observer Facility • PV phase completed, AO-1 program started 12/27/02 • NRA grant support for US PIs/Co-Is • 45 proposals received; $1.7M total requests • Peer reviewed last spring, $1.4M allocated (w/caveats) • 1st US observation last week (4U 1630-47) • 23 US PIs out of 105 total • AO-2 release planned for mid-July 03 • proposals due September Mission Status (con.)

  3. INTEGRAL Guest Observer Facility PV Phase: Cygnus Region

  4. INTEGRAL Guest Observer Facility Cygnus Region

  5. INTEGRAL Guest Observer Facility PV Phase Results: (XSPEC-12)

  6. INTEGRAL Guest Observer Facility Gamma-Ray Bursts: GRB 21125 Localized INTEGRAL is capable of localizing ~10-20 GRBs per year to ~10 arc min (prompt) accuracy. In Addition, the SPI anti-coincidence system can provide information to the Inter Planetary Network for triangulation.

  7. INTEGRAL Guest Observer Facility • 1H n-capture line clearly resolved, 16 keV @2216 keV • SPI resolution seems up to spec, R~500 except for detector 15 Solar Proton Flare

  8. INTEGRAL Guest Observer Facility • Public data archive to be mirrored at HEASARC • large data volumes, ~2.5-3 Gb/day (volume already exceeds CGRO!) • PV database now installed at GSFC as test (not publicly available) • Procurement initiated for physical archive through ~FY05 • Combined XMM+Swift+INTEGRAL anticipated 2.5Tb/year • Automated data transfer under study • data volumes pose difficulties • PV DB ~125 Gb, via network transfer (painful…) • Archive interface under development • Some -ray friendly enhancements desirable Database Issues:

  9. INTEGRAL Guest Observer Facility Software Issues • ISDC plans first public release in March 03 • Port to linux accomplished • GSFC is testing & development site • Successful end-to-end analyses carried out. Some issues: • Coded mask instrument concepts unfamiliar to many • first time users face steep learning curve • Analysis executables are “ftool-like”, but subtle difficulties • Analysis scripts are preferred approach, but can mask underlying complexities • Performance • Large DB volume & distribution over 100’s of files limits performance

  10. INTEGRAL Guest Observer Facility • Analysis system uses “object”& “grouping” concepts • data distributed over numerous files & directories, managed by FITS (“observation group” and “science window group”) tables • this renders use of familiar techniques for data inspection, screening (e.g. FV, fselect) difficult • Some ISDC standard keyword (such as extension names) require modifications to FTOOLs • Extensive use of type-II PHA files • Not supported by some FTOOLS such as grppha, mathpha • Also INTEGRAL-specific rmf & arf files (for SPI) Software Issues: Interoperability

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