GCN Circular 23607

U.Quadri, L.Strabla and A.Quadri report:

We imaged the field of GRB 190103B detected by SWIFT(trigger 881709)
with the robotic telescope of (IAU station 565) Bassano Bresciano 
Observatory, Italy. Member of: 
AAVSO - American Association of Variable Star Observers.
ISSP - Italian Supernovae Search Project.
UAI/SSV - Unione Astrofili Italiani/sezione stelle variabili.

The observations started 194.16 min after the GRB trigger,�� 
with our Schmidt telescope D=320/400 mm F/D=3.1.

Weather conditions were good.

We co-added 64 exposures of 240 sec each.

Start T0+���������� End T0+����������  Vlim
194.16 min���� 459.27 min��������19.5

We did not found any optical counterpart in the error box of the XRTcandidate.
A. Y. Lien (GSFC/UMBC), S. D. Barthelmy (GSFC), J. A. Kennea (PSU), et al.

Magnitudes were estimated with the UCAC4 cat. and 
are not corrected for galactic dust extinction.

Reference:
http://www.osservatoriobassano.org/GRB.asp

The message may be cited.