GRB 190203A: COATLI Optical Observations. Watson, A. M. ; Butler, N. ; Becerra, R. L. ; Gonzalez, D. ; Lee, W. H. ; Pereyra, M. ; Roman-Zuniga, C. ; Kutyrev, A. ; Troja, E. Abstract Publication: GRB Coordinates Network Pub Date: 2019 Bibcode: 2019GCN.23864....1W