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 27329

GRB 200306C: BOOTES-1 detection of the optical afterglow
2020-03-07T00:04:48Z (4 years ago)
Alberto J. Castro-Tirado at IAA-CSIC <>
Y.-D. Hu, A. J. Castro-Tirado and E. Fernandez-Garcia (IAA-CSIC), C. 
Perez del Pulgar, A. Reina, A. Castellon, I. Carrasco, I. Perez-Garcia 
(UMA), F. Rendon (IAA-CSIC and INTA-CEDEA), on behalf of a larger 
collaboration, report:

The 30cm BOOTES-1 robotic telescope at INTA-CEDEA in Huelva (Spain) 
automatically responded to the Swift trigger of GRB 200306C (Gropp et 
al., GCNC 27326). A sequence of 1-s images (clear filter) were obtained 
starting at 22:52:28 UT (i.e. 109s after the burst). At the UVOT 
position reported by Swift an optical transient is detected with R = 
14.9, in agreement with the MASTER (Lipunov et al. GCNC 27324) and FRAM 
detections (Jelinek et al. GCNC 27328). A detailed analysis for the 
sequence of images which were obtained is ongoing. The magnitude is 
calibrated against the USNO-B1 catalog and is not corrected for Galactic 
extinction in the direction of the GRB.

We thank the staff at INTA-CEDEA for its excellent support.
Looking for U.S. government information and services? Visit