GRB 190926A: Upper Limit from OSN T150 Observation
Abstract
We observed the field of GRB 190926A (Melandri et al. GCN #25848) with the 1.5m OSN telescope, at Sierra Nevada Observatory (Granada, Spain). The observation is centered 0.7321 days after the GRB and consisted of 41 x 180 s exposures in the Ic band for a total exposure time of 7380 s. No new object is detected within the refined XRT error circle (Goad et al. GCN #25850) down to a 3-sigma limit of Ic(AB) = 23.6 mag, as compared to stars of the PanSTARRS catalog. This is in agreement with other non-detections (Lipunov et al., GCN #25849, Zheng & Filippenko, GCN # 25852, Oates & Melandri, GCN #25853, Adachi et al., GCN #25854); and the very high-significance detection of excess hydrogen column density in the XRT observations (Sbarufatti et al., GCN #25851) indicates this is a dark GRB, and less likely a high-redshift one.
- Publication:
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GRB Coordinates Network
- Pub Date:
- September 2019
- Bibcode:
- 2019GCN.25856....1K