TITLE:   GCN CIRCULAR
NUMBER:  25937
SUBJECT: GRB 190926A: Upper limit from CAHA 2.2m observation
DATE:    19/10/03 14:31:18 GMT
FROM:    Alexander Kann at IAA-CSIC  <kann@iaa.es>

M. Blazek, D. A. Kann (both HETH/IAA-CSIC), A. de Ugarte Postigo 
(HETH/IAA-CSIC, DARK/NBI), C. C. Thoene, K. Bensch, J. F. Agui (all 
HETH/IAA-CSIC), I. Hermelo, and S. Pedraz (both CAHA) report:

We observed the field of GRB 190926A (Melandri et al. GCN #25848) with 
the 2.2m  telescope at Calar Alto Observatory, Spain. The observation is 
centered 0.6523 days after the GRB and consisted of 3 x 360 s exposures 
in the V band for a total exposure time of 1080 s, obtained before 
technical problems shut down the observation sequence.

No new object is detected within the refined XRT error circle (Goad et 
al. GCN #25850) down to a 3-sigma limit of V(AB) = 21.9 mag, as compared 
to stars of the GSC 2.3 catalog. This is in agreement with the deep 
non-detection by OSN (Kann et al., GCN #25856).