Fermi detects GRB 260208D with a calculated location and significant gamma-ray intensity.

AI Summary

Fermi's GBM instrument detected a long gamma-ray burst (GRB 260208D) with high significance, providing a calculated location and gamma-ray intensity. Follow-up observations by MASTER-OAFA reported upper limits on optical brightness.

Notices (1)

Fermi — GRB · Sun, 08 Feb 2026 16:12:45 GMT

GCN Circulars (2)

GCN-43654 — GRB 260208D · Mon, 09 Feb 2026 00:30:26 GMT
The MASTER-OAFA robotic telescope in Argentina observed Fermi GRB 260208D, reporting upper limits of 12.8 and 13.1 mag in clear band filter at 9675 and 9722 seconds, respectively. The observation began at a zenith distance of 83 degrees and sun altitude of -11.6 degrees.

GCN-43653 — GRB 260208D · Sun, 08 Feb 2026 21:53:17 GMT
The Fermi Gamma-ray Burst Monitor (GBM) has detected a long gamma-ray burst (GRB 260208D) at a calculated location of RA = 327.7, Dec = -39.0 (J2000 degrees) with a statistical uncertainty of 6.9 degrees. The angle from the Fermi Large Area Telescope (LAT) boresight is 51.0 degrees. This event was triggered at 21:42:45 UT on 8 February 2026.