General information
AstroSat CZTI reports the detection of GRB 260731A as a long burst, also seen by SVOM and Konus-Wind. The circular provides prompt timing and count-rate measurements from AstroSat instruments.
Wavelength coverage
- Gamma-ray: AstroSat CZTI detection in 20-200 keV.
- Gamma-ray: AstroSat CsI anticoincidence (Veto) detection in 100-500 keV.
- Gamma-ray: independent detections reported by SVOM and Konus-Wind.
No optical, X-ray, radio, or neutrino observations are mentioned.
Lightcurve and spectrum
- CZTI light curve peaks at 2026-07-31 23:58:22.466 UTC.
- CZTI peak count rate is 314 (+34, -33) counts/s above background.
- CZTI total counts are 2019 (+162, -264).
- CZTI T90 is 11 (+3, -3) s.
- Veto light curve peaks at 2026-07-31 23:58:21.203 UTC.
- Veto peak count rate is 417 (+49, -5) counts/s above background.
- Veto total counts are 1801 (+233, -234).
- Veto T90 is 8 (+4, -2) s.
Redshift
What’s special vs typical
It is notable mainly for being a clean long GRB with detections in multiple gamma-ray instruments and two AstroSat detector channels, but no counterpart, localization refinement, or distance information is provided here.