Multiple observatories detect GRB 261024D with distinct pulse structures

AI Summary

GRB 261024D was detected by SVOM, AstroSat, NuSTAR, and others, exhibiting multi-pulse structures with durations ranging from 9 to 11 seconds and peak count rates up to 2957 counts per second. Follow-up observations are ongoing to further characterize the burst.

Measurements

Notices (1)

SVOM — GRB · Sat, 24 Oct 2026 21:33:05 GMT

GCN Circulars (6)

GCN-46094 — GRB 261024D · Thu, 29 Oct 2026 15:17:19 GMT
The long-duration Gamma-Ray Burst (GRB) 261024D was detected by multiple space-based observatories including AstroSat, NuSTAR, and Konus-Wind. The InterPlanetary Network (IPN) has triangulated its position to a preliminary error box with coordinates centered at RA 212.913, Dec +31.361.

GCN-46065 — GRB 261024D · Wed, 28 Oct 2026 04:41:34 GMT
On October 24, 2026, the Insight-HXMT/HE telescope detected a gamma-ray burst (GRB 261024D) which was also observed by multiple other telescopes. The burst exhibited multiple pulses with a duration (T90) of approximately 9 seconds and a peak rate of 2957 counts per second.

GCN-46061 — GRB 261024D · Tue, 27 Oct 2026 14:59:59 GMT
The GECAM-B satellite detected a gamma-ray burst, GRB 261024D, on October 24, 2026, at 21:33:05.250 UTC, which was also observed by other telescopes including AstroSat CZTI, NuSTAR, and Glowbug. The burst consisted of multiple pulses with a duration of approximately 9.5 seconds, and its location was calculated with a statistical uncertainty of 5.46 degrees.

GCN-46053 — GRB 261024D · Tue, 27 Oct 2026 01:24:21 GMT
The Glowbug gamma-ray telescope on the International Space Station detected GRB 261024D, a gamma-ray burst with a triple-peaked structure lasting 9.2 seconds, which was also observed by multiple other satellites. This detection is significant as it demonstrates the capability of the Glowbug telescope in identifying gamma-ray transients.

GCN-46051 — GRB 261024D · Mon, 26 Oct 2026 21:58:49 GMT
The NuSTAR SINGS working group detected prompt emission from the long-duration gamma-ray burst GRB 261024D, which was also detected by SVOM-GRM, KONUS-Wind, and AstroSat-CZTI. The burst lasted approximately 10 seconds with a peak count rate of 1500 cps, and its localization implies significant offsets from the NuSTAR boresight and geocenter.

GCN-46040 — GRB 261024D · Mon, 26 Oct 2026 10:14:30 GMT
AstroSat's CZTI instrument detected a long gamma-ray burst (GRB 261024D) on October 24, 2026, which was also observed by SVOM/GRM and KONUS-Wind. The burst was detected in the 20-200 keV energy range with a peak count rate of 105 counts/s and a duration of approximately 11 seconds.