STARITHM
Einstein Probe WXT detects gamma-ray burst 01709320985 with no optical counterpart observed
AI Summary
A gamma-ray burst (GRB) was detected by the Einstein Probe WXT instrument with a net count rate of 0.03 counts/s in the 0.5-4 keV range. Follow-up optical observations with the D50 telescope did not reveal any new optical source within the error circle, setting an upper limit of r' > 21.2.
Measurements
| Event ID | 01709320985 |
|---|---|
| Source | Einstein Probe WXT |
| Alert type | GRB |
| Significance | medium |
| Trigger time (UTC) | Tue, 06 Oct 2026 17:49:57 GMT |
| Right ascension (J2000) | 21.806° |
| Declination (J2000) | 12.9° |
| Position error radius | 0.05189369° |
| Image SNR | 7 |
| GCN notices | 1 |
| GCN circulars | 1 |
Notices (1)
Einstein Probe WXT — GRB · Tue, 06 Oct 2026 17:49:57 GMT
GCN Circulars (1)
GCN-45821 — EP trigger 01709320985
· Tue, 06 Oct 2026 20:15:34 GMT
The Einstein Probe/WXT trigger 01709320985 was observed by the D50 telescope at the Astronomical Institute Ondrejov, but no new optical source was detected within the error circle, with a 3-sigma upper limit of r' > 21.2 in a combined 5700s image. The early unfiltered image reached a 3-sigma limit of ~18.2 mag.
AI summary generated Tue, 06 Oct 2026 20:29:19 GMT.