TITLE: GCN CIRCULAR NUMBER: 15740 SUBJECT: GRB 140114A: ROTSE-III Optical Limits DATE: 14/01/15 01:07:06 GMT FROM: Farley V. Ferrante at Southern Methodist U/ROTSE T. Guver (Istanbul Univ.), F. V. Ferrante (SMU), R. Kehoe (SMU), G. Dhungana (SMU), and W. Zheng (UC Berkely) report on behalf of the ROTSE GRB team: ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB 140114A (Swift trigger 583861; Troja et al, GCN 14728), producing images beginning 22.4 s after the GCN notice time. An automated response took the first image at 11:59:20.4 UT, 98.1 s after the burst, under fair conditions. We took 10 5-sec, 10 20-sec and 9 60-sec exposures. These unfiltered images are calibrated relative to USNO A2.0 (R). Imaging is on going. Comparison to the DSS (second epoch) reveals no new sources within the 3-sigma Swift/BAT error circle or the XRT error circle; the field is not crowded. Individual images have limiting magnitudes ranging from 14.0-15.1; we set the following specific limits. start UT end UT t_exp(s) mlim t_start-t_GRB(s) Coadd? --------------------------------------------------------------------------- 11:59:20.4 11:59:25.4 5 14.0 98.1 N 11:59:20.4 11:60:20.4 60 15.0 98.1 N