Gamma-Ray Bursts in the SPI Anti-Coincidence

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January view view view view view view view view view view view view view view view
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This page and the pages for individual months are generated automatically. For each trigger the following information is available:

  1. Trigger Date/Time : YYYY-MM-DDTHH:MM:SS. If the IGRACS identifier is assigned to the event (as it is in the case of a confirmed event), it is also shown in this field
  2. Notification : indicates whether an E-mail notification has already been sent
  3. Type : the type of the burst (optional)
  4. Flag : AUTO means file was generated in real time by the software, OFFLINE means file was generated by the operator
  5. Sigma : the sigificance of the burst
  6. Duration : the duration of the burst (optional)
  7. Max. Count : the maximum count rate of the burst
  8. Lightcurve File (LC) : this is an ASCII file. Under nominal conditions it covers period from 5 seconds before the trigger to 100 seconds after the trigger. The second field of the first line is the date in DD/MM/YY format. The next entry is the start time expressed as the seconds of the day (UTC). The last two entries are the lower and upper energy ranges in keV. On the second line, the first number is the background count rate, in counts/time interval, followed by the time resolution (bin size) in seconds. The following lines contain the start time of each time interval relative to the time on the first line, and the number of counts in that interval.
  9. Ephemeris File (EPH) : this is an ASCII file. The first line contains the RA and DEC in degrees and decimals, J2000 epoch, followed by the distance from the Earth center in km. The second line contains the 3 sigma uncertainties in each of these values.
  10. Image (IMG) : this is graphical image (in PNG format) of the lightcurve covering period from 5 seconds before the trigger to 100 seconds after the trigger. Units are : X-axis - seconds from triggers' time, Y-axis - SPIACS countrate per time bin (50 millisec). The precise trigger's UTC time (reference time) is given in the lightcurve file and/or in diagram's title
  11. Zoom : this is graphical image (in PNG format) of the zoomed lightcurve covering the time period from 5 seconds before the trigger to 10 seconds after the trigger. Units are : X-axis - seconds from trigger's time, Y-axis - SPIACS countrate per time bin (50 millisec) The precise trigger's UTC time (reference time) is given in the lightcurve file and/or in diagram's title
  12. Comment : additional information about the trigger (optional)

Note : since this page provides unprocessed data, many triggers generated before 14.Jan.2003 have invalid data in their lightcurve files (OFFLINE triggers have always valid lightcurve files).

Notes about timing :

For questions please contact ISDC IBAS team