HETE Burst H3751

Burst H3751 summary

  • Trigger time is
    • UTC=20050509_224553
    • GRB=GRB050509+81953
  • Triggering instrument was WXM
  • Trigger timescale was 5.12 seconds
  • Trigger detected in 2-25 keV band


Evaluation GRB050509C



XRF. Very soft, no counts above 20 keV.




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


The color of trigger H3751, 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 H3751 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.


Burst is very soft, with no emission above 20 keV. Clearly an XRF.


Skymap for HETE trigger H3751


Link to Jochen Greiner's web page on GRB050509C