# Presentation: 880772

## 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:

## 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.)

## INTEGRAL Guest Observer Facility

- PV Phase: Cygnus Region

## INTEGRAL Guest Observer Facility

- Cygnus Region

## INTEGRAL Guest Observer Facility

- PV Phase Results:
- (XSPEC-12)

## 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.

## INTEGRAL Guest Observer Facility

**1****H n-capture line clearly resolved, 16 keV @2216 keV**
**SPI resolution seems up to spec, R~500 except for detector 15**

- Solar Proton Flare

## 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:

## INTEGRAL Guest Observer Facility

**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

- Software Issues

## 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