NSSDCA ID: SOGA-00008
Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)
Time span: 1990-11-10 to 2004-12-31
This data set consists of an integral omnidirectional counting rate taken from the summed output of two hemispherical, 3-mm CsI scintillators with nominal hard x-ray response in the energy range 25 - 150 keV. This channel responds to solar and cosmic x-ray/gamma ray bursts but is also sensitive to direct impacts from solar energetic particles and trapped radiation, such as during the March 1991 flare event and the Ulysses encounter with Jupiter in Feb. 1992. Dependent on telemetry rate and instrument operating mode, the time resolution of the data is 0.25, 0.5, 1, or 2 seconds. Typical baseline counting rates are about 500 c/s. Telemetry rate changes produce sort spikes in the rates due to a processing artifact, and another problem with onboard software causes short dropouts in the count rate. Each data record consists of header information, year, day, UT time of day, total counts, and count integration time. The native data consist of gz-compressed binary files including one day of data per file. A source files in C language is provided for reading the binary data and conversion into ASCII format. This data set was completely reprocessed in April 1997 from launch through October 1996 to remove timing errors introduced by mission data processing; earlier versions of this data set should be discarded. The document, software, and sample data files are available on-line at https://spdf.gsfc.nasa.gov/pub/data/ulysses/gamma/grb_1sec/
Questions and comments about this data collection can be directed to: Dr. John F. Cooper
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Kevin C. Hurley | Data Provider | University of California, Berkeley | kevinhurley@berkeley.edu |
Mr. Roger W. Williams | General Contact | University of California, Berkeley | williams@ssl.berkeley.edu |