GRB 260710A: Long gamma-ray burst detected by Fermi GBM and confirmed by multiple instruments

AI Summary

Fermi GBM detected a long gamma-ray burst (GRB 260710A) on July 10, 2026 at 12:58:43.52 UTC (trigger 805381128) with a localization of RA=5.6°, Dec=-85.0° and 1.8° uncertainty. The burst consisted of a single pulse with T90 duration of 1.9-2.6 seconds, best fit by a power law with exponential high-energy cutoff (Epeak ~139-161 keV), and fluence of ~2.2×10⁻⁶ erg/cm². The event was independently confirmed by SVOM/GRM, Insight-HXMT/HE, and AstroSat CZTI, establishing this as a well-characterized astrophysical GRB.

Measurements

Notices (1)

Fermi GBM — GRB · Fri, 10 Jul 2026 12:58:43 GMT

GCN Circulars (5)

GCN-45182 — GRB 260710A · Sat, 18 Jul 2026 18:22:10 GMT
The SVOM/GRM instrument detected a gamma-ray burst, GRB 260710A, on July 10, 2026, at 12:58:43.450 UTC, which was also observed by Fermi/GBM. The burst consisted of a single pulse with a duration (T90) of 2.60 seconds and had a time-averaged spectrum best fitted by a power law function with an exponential high-energy cutoff.

GCN-45165 — GRB 260710A · Wed, 15 Jul 2026 08:57:17 GMT
The AstroSat CZTI instrument detected a short duration gamma-ray burst, GRB 260710A, which was also observed by Fermi and Insight-HXMT/HE. The burst was detected in the 100-500 keV energy range with a peak count rate of 331 counts/s above the background.

GCN-45144 — GRB 260710A · Mon, 13 Jul 2026 08:27:04 GMT
The Insight-HXMT/HE telescope detected a gamma-ray burst (GRB 260710A) on July 10, 2026, at 12:56:43.800 GMT, which was also detected by Fermi/GBM. The burst consisted of a single pulse with a duration (T90) of 1.2 seconds and a peak count rate of 727 counts per second.

GCN-45138 — GRB 260710A · Sat, 11 Jul 2026 11:40:47 GMT
On July 10, 2026, the Fermi Gamma-ray Burst Monitor detected GRB 260710A, a gamma-ray burst with a duration of 1.9 seconds and a peak photon flux of 30 ph/s/cm^2. The event's spectrum was best fit by a power law function with an exponential high-energy cutoff, indicating a significant astronomical event.

GCN-45131 — GRB 260710A · Fri, 10 Jul 2026 13:09:14 GMT
The Fermi Gamma-ray Burst Monitor (GBM) detected a likely long gamma-ray burst (GRB) on July 10, 2026, at 12:58:43 UT, designated GRB 260710A. The event was located at RA = 5.6, Dec = -85.0 (J2000 degrees) with a statistical uncertainty of 1.8 degrees.