TITLE: GCN CIRCULAR NUMBER: 16611 SUBJECT: GRB 140719A: GROND Afterglow candidate DATE: 14/07/20 07:32:00 GMT FROM: Jan Bolmer at MPE/Garching J. Bolmer, F. Knust, K. Valera and J. Greiner (all MPE Garching) report on behalf of the GROND team: We observed the field of GRB 140719A (Swift trigger 605612; Cummings et al., GCN 16606) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2m MPG telescope at ESO La Silla Observatory (Chile). Observations started at 22:59 UT on July 19, 2014, 16.8 hrs after the GRB trigger. They were performed at an average seeing of 1.1“ and at an average airmass of 1.5. We find a faint source inside the XRT error circle given in Evans et al. (GCN 16607) at coordinates RA, Dec = 171.60123, -50.13466, which is equal to: RA (J2000): 11:26:24.3 Dec (J2000): -50:08:04.8 with an uncertainty of 0.5 arcsec in each coordinate. Based on a total exposures of 3000 seconds in g'r'i'z' and 1200 seconds in JHK, at a mid-time of 18.4 hrs after the burst, we measure the following preliminary magnitudes (all in AB): g' > 25.3, r' = 23.7 +/- 0.2, i' = 22.9 +/- 0.2, z' > 23.8, J > 21.4, H > 20.9 and K > 19.5. At present we cannot confirm whether the source is fading. Given magnitudes are calibrated against GROND zeropoints as well as 2MASS field stars and are not corrected for the expected Galactic foreground extinction corresponding to a reddening of E_(B-V) = 0.12 mag in the direction of the burst (Schlegel et al. 1998). [GCN OPS NOTE(20jul14): Per author's request, the author list was added and the arcsec symbol was replaced.]