Swift GRB 240112C: Global MASTER-Net observations report

MASTER-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the Swift GRB 240112C ( R. A. J. Eyles-Ferris et al., GCN 35522) errorbox 8981 sec after notice time and 9002 sec after trigger time at 2024-01-12 20:07:27 UT, with upper limit up to 15.4 mag. The observations began at zenith distance = 85 deg. The sun altitude is -45.5 deg. The galactic latitude b = 21 deg., longitude l = 51 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2354458 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 9040 | MASTER-Tunka | C | 75 | 12.4 | 9124 | MASTER-Tunka | C | 70 | 15.4 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.