TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2822 SUBJECT: GRB 041016: BOOTES-2 simultaneous observation DATE: 04/10/18 07:49:42 GMT FROM: Alberto Castro-Tirado at Inst.de Astro. de Andalucia M. Jelínek, A. J. Castro-Tirado, A. de Ugarte Postigo, (IAA-CSIC Granada), S. Vitek (Czech Technical University, Prague), P. Kubanek (Astronomical Institute of the Academy of Sciences, Ondrejov), T. J. Mateo Sanguino (University of Huelva),T. Soria (EELM-CSIC, Málaga) and J. Fabregat (University of Valencia) report: The BOOTES-2 very wide field camera located at the Estación Experimental de La Mayora (EELM-CSIC) in Málaga observed the region of the sky containing the WXM error box for GRB 041016 (HETE trigger 3578) as part of the routinary observing schedule. The field was not observed at optimum conditions (air airmass, cirruses). A 30s exposure started at 4:40:00 UT (20.5s after beginning of the 33s long burst), i.e. covering the last 12.5s of the burst's gamma ray activity. This image, sets a R = 7.0 upper limit to the promt optical flash for GRB 041016. This message can be quoted.