GCN Circular 16664
D. A. Kann (TLS Tautenburg), C. Delvaux and Jochen Greiner (both MPE Garching) report on behalf of the GROND team: We observed the field of GRB 140730A (Swift trigger 607742; Markwardt et al., GCN #16642) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG telescope at ESO La Silla Observatory (Chile). Observations started at 08:36 UT on 2014-08-02, 2.52 days after the GRB trigger. They were performed at an average seeing of 1".2 and at an average airmass of 1.4. Based on images with exposure times of 2250 s in g'r'i'z' and 1200 s in JHK, we do not detect a source within the Swift-XRT error circle reported by Goad et al. (GCN #16644) down to to the following 3-sigma AB magnitudes: g' > 25.3 mag, r' > 25.4 mag, i' > 24.7 mag, z' > 24.4 mag, J > 21.0 mag, H > 20.3 mag, and K > 18.0 mag. The given limits are derived based on calibrating the images against the GROND zeropoints and 2MASS field stars and are not corrected for the Galactic foreground extinction corresponding to a reddening of E_(B-V)= 0.09 in the direction of the burst (Schlegel et al. 1998).