TITLE: GCN GRB OBSERVATION REPORT NUMBER: 537 SUBJECT: Optical observations of GRB000131 DATE: 00/02/09 11:37:45 GMT FROM: SG Bhargavi at Indian Inst of Astrophysics S.G.Bhargavi, A.K. Pati, G. SelvaKumar and R.Cowsik (Indian Institute of Astrophysics,Bangalore, India 560034) We observed the error box of GRB000131 (GCN #529, #530) on Feb 4th and 5th between 15-18UT using the 2.34m as well as 1.02m telescopes of Vainu Bappu Observatory, Kavalur, India. The sky conditions were non-photometric with poor transparency and seeing (fwhm >2".5). The fading optical counterpart reported by Peredson et al ( GCN #534) is not detected in a single 30min V image (limiting magnitude = 21.0) taken on Feb 4.68 UT with 2.34m telescape.