TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3702 SUBJECT: GRB 050709: PROMPT Rc Observations DATE: 05/07/30 05:41:53 GMT FROM: Josh Haislip at U.North Carolina J. Haislip, J. Kirschbrown, D. Reichart report on behalf of the UNC team of the FUN GRB Collaboration: Under the control of Skynet, PROMPT automatically observed the localization of the probable short-hard GRB 050709 (Butler et al., GCN 3570; Boer et al., GCN 3653) beginning 1.1 days after the burst (Bayliss et al., GCN 3569) and again beginning 8.3 days after the burst. 3-sigma limiting magnitudes are based on 5 USNO-B1.0 stars: Mean Time Integration Filter Limiting Telescope Since GRB Time Magnitude 1d 5h 36m 82 x 80s Rc 21.6 PROMPT-5 8d 9h 3m 136 x 80s Rc 21.6 PROMPT-5 We detect the host galaxy (Fox et al., GCN 3585; Price et al., GCN 3612) in both epochs and measure its brightness to be Rc = 21.16 +/- 0.26 and Rc = 21.06 +/- 0.21, respectively. PSF-matched image subtraction using ISIS2 (Alard 2000) does not reveal the afterglow (Price et al., GCN 3612). PROMPT is still being built and commissioned. Alard, C. 2000, A&AS, 114, 363