Fermi GBM detects likely long GRB 260709A with multiple pulses.

AI Summary

GRB 260709A was detected on July 9, 2026, with a T90 duration of 63 seconds and a power-law index of -2.87. Follow-up observations by SVOM/GRM and GECAM-B confirmed the burst's characteristics.

Measurements

Notices (1)

Fermi GBM — GRB · Thu, 09 Jul 2026 01:07:32 GMT

GCN Circulars (3)

GCN-45137 — GRB 260709A · Sat, 11 Jul 2026 05:58:51 GMT
The SVOM/GRM detected GRB 260709A on July 9, 2026, at 01:07:50.900 GMT, which was also observed by Fermi/GBM. The burst consisted of multiple pulses with a T90 duration of 63 seconds in the 15-5000 keV band, and its position was outside the SVOM ECLAIRs field of view.

GCN-45136 — GRB 260709A · Sat, 11 Jul 2026 05:57:32 GMT
The GECAM-B satellite detected a gamma-ray burst, GRB 260709A, on July 9, 2026, at 01:07:32 UTC, which was also observed by Fermi/GBM. The burst lasted approximately 56 seconds and had a power law index of -2.38, with a fluence of 1.5e-05 erg/cm^2 in the 10-1000 keV range.

GCN-45121 — GRB 260709A · Thu, 09 Jul 2026 01:18:22 GMT
The Fermi Gamma-ray Burst Monitor (GBM) detected a likely long gamma-ray burst (GRB 260709A) on July 9, 2026, at 01:07:32 UT. The event was located at RA = 84.1, Dec = 74.0 (J2000) with a statistical uncertainty of 4.0 degrees, and it was 106.0 degrees from the Fermi LAT boresight.