GRB 200306C: Calar Alto 2.2m upper limit
Abstract
We observed the field of the afterglow of GRB 200306C (Lipunov et al., GCNs #27324, #27325; Gropp et al., GCN #27326; Jelinek et al., GCN #27328; Hu et al., GCN #27329; Moskvitin, GCN #27333; Izzo & Perley, GCN #27334; Kann et al., GCN #27335; Steele et al., GCN #27338) with the 2.2m telescope of Calar Alto equipped with CAFOS. We obtained 4 x 720 s images in the Rc band under adverse conditions (moonlight, passing clouds, bright star still there). Our stacked image centred at mean epoch 1.25519 d after the GRB shows no detection to a 3-sigma upper limit of Rc > 23.0 mag (AB). The magnitude limit was obtained versus SDSS stars in the field.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- March 2020
- Bibcode:
- 2020GCN.27348....1K