IBIS Veto System. Background rejection, instrument dead time and zoning performance

Details IBIS Veto System. Background rejection, instrument dead time and zoning performance IBIS Veto System. Background rejection, instrument dead time and zoning performance

Nov 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...411l.153q&link_type=abstract

Astronomy and Astrophysics, v.411, p.L153-L157 (2003)

Astronomy and Astrophysics

Astrophysics

7

Integral, Gamma-Ray, Veto, Calibration

Scientific paper

IBIS is the high energy imager on board the INTEGRAL satellite. The gamma-ray instruments on board will take advantage of the long uninterrupted observation made possible by the very eccentric orbit (10 000 km perigee and 152 000 km apogee). A disadvantage for orbits outside the protection of the van Allen belts is the exposure to cosmic and solar particles. Conversely, the background is quite stable throughout the 3 days orbit. In order to maximise the scientific returns and take full use of these almost 3 days continuous observations, IBIS is equipped with a light, very effective Veto System. This ensures a substantial reduction of the background due to the induced photon and hadronic component, in turn enhancing the detector sensitivity. The performance of the IBIS veto as evaluated during telescope commissioning is reviewed. In particular, the efficiency of background rejection and the resulting IBIS dead time are evaluated as well as the impact of different zoning configurations. Measured over the whole energy range, the veto system provides a background suppression effect of ~ 50% for ISGRI and ~ 40% for PICsIT. The definitive veto settings optimised for the operational working temperature and background conditions are described.
Based on observations with INTEGRAL, an ESA project with instruments and science data centre funded by ESA member states (especially the PI countries: Denmark, France, Germany, Italy, Switzerland, Spain), Czech Republic, Poland, Norway and UK, and with the participation of Russia and the USA.

Affiliated with

Also associated with

No associations

Rating

IBIS Veto System. Background rejection, instrument dead time and zoning performance does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with IBIS Veto System. Background rejection, instrument dead time and zoning performance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and IBIS Veto System. Background rejection, instrument dead time and zoning performance will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1086378