HETE Burst U11658

Burst U11658 summary

  • Trigger time is
    • UTC=20050922_195549
    • GRB=GRB050922+71749
  • Triggering instrument was Fregate
  • Trigger timescale was 0.320 seconds
  • Trigger detected in 30-400 keV band

Evaluation GRB050922C


Download ASCII table of Fregate Band A, B, C lightcurves here.

The color of trigger U11658, defined by the ratio of total counts in Fregate band C (30-400 keV) to band A (7-40 keV) vs. band B (7-80 keV) to band A, overlaid on a the color-color plot of all localized bursts detected to date. Note the separation of XRFs, XRRs, and GRBs.

The signal to noise in Fregate band C (30-400 keV) of trigger U11658 in relation to the S/N of band C of other localized HETE triggers. We find empirically that most XRFs are faint and soft: the fact that localized bursts require a minimum S/N in the 2-25 keV band means that the band C S/N should be low. We find a cutoff in the band C S/N of 6.5 delineates the XRF/non-XRF population with high reliability.

Skymap for HETE trigger U11658

Link to Jochen Greiner's web page on GRB050922C