GCN Circular 14208
W. Zheng (UC Berkeley), H. Flewelling (IfA/Hawaii), T. Guver (Sabanci U), F. Yuan (Australian National University), report on behalf of the ROTSE collaboration: Further analysis of ROTSE-IIIb data revealed that the OT of GRB 130215A (Swift trigger 548760; D'Elia et al., GCN 14204; Zheng et al GCN 14205; LaCluyze et al. 14206) peaked around 750s after the burst, followed with a single power-law decay with index alpha = -1.24 up to ~4ks after the burst. Observation is on going. Interestingly the GRB is also triggered by Fermi-GBM (trigger 382584689). The GBM trigger arrived ~600s earlier than Swift-BAT trigger and ROTSE-IIIb responded to GBM trigger at first. A 4x4 tiling follow-up mode was performed before BAT-trigger interrupted it and a total of 22 images were obtained to GBM trigger. Unfortunately, our effort of the tiling follow-up still didn't cover the OT location in these images since the GBM trigger is about 3.78 degree away, just a bit away from one of the corner.