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Detecting Instruments


Instrument Spacecraft Lifetime Energy Range Trigger Criterion
Astrophysico-Planetological Experiment (APEX) Phobos Jul 1988 - Mar 1989 (60-70 keV) to 9.3 MeV 7-11σ count rate increase over expected levels during a one-sixteenth, one-fourth or one second interval
Burst and Transient Source Experiment (BATSE) Compton Gamma-Ray Observatory (CGRO) Apr 1991 - Jun 2000 20 keV to 1 MeV Count rate with statistically significant increase above backgroun in each of three time scales (64, 256 and 1024 ms) in two detectors
Compton Telescope (COMPTEL) Compton Gamma-Ray Observatory (CGRO) Apr 1991 - Jun 2000 80 keV to 30 MeV  
French Gamma-ray Telescope (FREGATE) HETE-2 Oct 2000 - Present 6 keV to 400 keV  
Gamma-Ray Burst Experiment (GRB) Ulysses Oct 1990 - Present 15 keV to 150 keV Count rate in excess of 8σ above background
Gamma-Ray Detector Defense Meteorological Satellites Program (DMSP) Jun 1987 -Present >50 keV Count rate in excess of 8σ above background
Gamma Ray Detector Vela 5A
Vela 5B
May 1969 - June 1979 150 keV to 750 keV Rapid rise in count rate to level significantly above the background
Gamma Ray Detector Vela 6A
Vela 6B
Apr 1970 - mid-1979 300 keV to 1.5 MeV Rapid rise in count rate to level significantly above the background
Gamma Ray Experiment Helios 2 Jan 1976 - 1981 60 keV - 1.5 MeV Three command-adjustable trigger modes set in-flight at levels in proportion to background levels
Gamma Ray Spectrometer (GRS) Solar Maximum Mission (SMM) Feb 1980 - Dec 1989 300 keV to 9 MeV  
Gamma Ray Spectrometer (GRS) Yohkoh Aug 1991 -Present (?) 200 keV to 100 MeV  
Goddard Gamma-Ray Burst Spectrometer International Sun-Earth Explorer (ISEE) Aug 1978 - May 1997 200 keV to 3 MeV Rapid increase in count rate
Konus Venera 11
Venera 12
Venera 13
Venera 14
Sep 1978 - Feb 1980
Sep 1978 - Apr 1980
Oct 1981 - Mar 1983
Nov 1981 - Mar 1983
20 keV to 8 MeV 6σ rise in count rate over background in 50 to 200 keV enrgy range
Gamma-Ray Spectrometer (GRS) Mar Observer (MO) Sep 1992 - Aug 1993 500 keV to 2 MeV  
Phebus GRANAT Dec 1989 - Nov 1998 100 keV to 100 MeV 8σ excess of pulses in the 0.1-1.6 MeV range over a 0.25 or 1 second integration time
Orbiter Gamma Burst Detector Pioneer Venus Orbiter (PVO) May 1978 - Oct 1992 100 keV to 2 MeV Statistically significant, rapid rise in detector counting rate
Sigma GRANAT Dec 1989 - Nov 1998 30 keV to 1.3 MeV Count rate averaged over either 0.25 or 2 seconds in either the 40-90 keV or 90-750 keV band which exceeds the count rate over the previous 64 seconds by 9σ
Signe 2m Venera 11
Venera 12
Prognoz 7
Sep 1978 - Feb 1980
Sep 1978 - Apr 1980
Oct 1978 - Jun 1979
(50-270 keV) to (600-3000 keV) >8σ increase in count rate over normal in 250 ms interval
SNEG 2m3 Venera 13
Venera 14
Oct 1981 - Mar 1983
Nov 1981 - Mar 1983
50 keV to 800 keV 6.5σ increase in count rate in less than 1 second; σ is the dispersion of the averaged measured background
Wide Angle Telescope for Cosmic Hard X-rays (Watch) GRANAT
Eureca
Dec 1989 - Nov 1998
Aug 1992 - Jul 1993
6 keV to 150 keV Count rate in excess of 6σ above the background in one of 12 sampling times logarithmically distributed from 16 ms to 32 s
Wide Field Camera BeppoSAX Apr 1996 - Apr 2002 2 keV to 30 keV  
SPectrometer on INTEGRAL (SPI) INTEGRAL Oct 2002 - Present 20 keV to 8 MeV  
Imager on Board the Integral Satellite (IBIS) INTEGRAL Oct 2002 - Present 15 keV to 10 MeV  

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Last modified: Thursday, 19-Jun-2008 16:23:01 EDT