GCN Circular 16693
GRB 140815A: GROND afterglow candidate J.F. Graham, M. Tanga and J. Greiner (all MPE Garching) report on behalf of the GROND team: We observed the field of GRB 140815A (Mereghetti et al., GCN #16690) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2m MPG telescope at La Silla Observatory (Chile). Observations started at 08:17 UT on 16 August 2014, 10.37 hours after the INTEGRAL trigger. They were performed at an average seeing of 1".3 and at an average airmass of 1.5. We report the presence of a source within the XRT error circle (Mangano et al., GCN #16691) at: RA(J2000) = 86.89231 = 05h 47m 34.15s Dec(J2000) = -8.68021 = -08d 40' 48.7" which has the following preliminary magnitudes and upper limits (all in AB) at a mid-time of 09:30 UT: g' > 24.0 r' > 24.0 i' = 23.3 +/- 0.3 z' = 22.2 +/- 0.2 J = 21.2 +/- 0.3 H > 20.3 K > 19.3 At the moment we cannot determine whether or not the source is fading. Given magnitudes are calibrated against GROND zero points as well as 2MASS field stars (JHK) and are not corrected for the expected Galactic foreground extinction corresponding to a reddening of E_(B-V)=1.10 mag in the direction of the burst (Schlafly & Finkbeiner 2011).