Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 28701

GRB 201020A: Nanshan/NEXT optical observations
2020-10-20T16:08:23Z (4 years ago)
Dong Xu at NAOC/CAS <>
S.Y. Fu (NAOC), Z.P. Zhu (NAOC, HUST), X. Liu, D. Xu (NAOC), X. Gao 
(Urumqi No.1 Senior High School), J.Z. Liu (XAO) report:

We observed the field of GRB 201020A (Ambrosi et al., GCN 28696) using 
the NEXT-0.6m telescope located at Nanshan, Xinjiang, China. We obtained 
15x120s frames in the Sloan r-band, starting at 13:48:25 UT on 
2020-10-20, i.e., 8.02 hr after the BAT trigger.

The optical afterglow (Ambrosi et al., GCN 28696; Adachi et al., GCN 
28697) of the burst is clearly detected in our stacked image, with r = 
19.69 +/- 0.06 mag at T_mid = 0.3461 day post-burst, calibrated with 
nearby PS1 stars.
Looking for U.S. government information and services? Visit