TITLE: GCN CIRCULAR NUMBER: 28689 SUBJECT: GRB 201014A: 3.6m DOT Optical Observations DATE: 20/10/19 15:01:21 GMT FROM: Amit Kumar at ARIES, India A. Kumar (ARIES), R. Gupta (ARIES), Dimple (ARIES), A. Ghosh (ARIES), A. Aryan (ARIES), B. Kumar (ARIES), N Panwar (ARIES), S. B. Pandey (ARIES), and K. Misra (ARIES) report: We observed the XRT localized GRB 201014A (Swift trigger =1000255, Ambrosi et al., GCN 28623; Perri et al., GCN 28638) using the 4Kx4K CCD Imager (Pandey et al. 2018, 2018BSRSL..87...42P) mounted at axial port of the 3.6m Devasthal Optical Telescope (DOT) of ARIES Nainital. The observations were carried out on 2020-10-15 in Bessel R-band (300s X 2 frames) from UT 21:22:35 to 21:32:59 (corresponding to 22.6 hours after the BAT trigger time). No new optical source was detected within the Swift XRT enhanced error circle (see also Pozanenko et al., GCN 28628; de Ugarte Postigo et al, GCN 28650, Zhu et al, GCN 28655). The aperture photometry on the stacked R-band image was performed and calibrated against the USNO-B1 nearby stars. The 3-sigma upper limit within the XRT error circle is as follows: T_start-T0 (hours), Start UT, End UT, Filter, 3-sigma upper limit ------------------------------------------------------------------------------------------------- 22.57, 2020-10-15 UT 21:22:35.8, 2020-10-15 UT 21:32:58.9, R, >22.5 mag The limiting magnitude is not corrected for Galactic extinction in the the direction of the GRB. 3.6m Devasthal Optical Telescope (DOT) is a recently commissioned facility in Northern Himalayan region of India (long:79 41 04E, lat:29 21 40N, alt:2540m) owned and operated by the Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital (https://www.aries.res.in). Authors of this GCN circular thankfully acknowledge consistent support from the staff members to run and maintain the 3.6m DOT. This circular may be cited.