GCN Circular 16884
D. A. Perley (Caltech) reports on behalf of a larger collaboration: The Palomar 60-inch robotic telescope automatically triggered on the Swift-BAT alert for GRB 141005A (GCN 16882, D'Elia et al.) and began observations of the field at 05:16:28 UT, 202 seconds after the BAT trigger. A sequence of cycling 60-second r, i, and z band images were acquired, ending at 05:33:20 UT. In the initial images we identify a source inside the SPER XRT error circle at the following position: RA = 19:24:22.392 dec = +36:05:42.26 (J2000, +/- 0.3") The source is faint and probably fading, from r = 20.6 +/- 0.2 and i = 20.0 +/- 0.2 in the initial exposures to r = 21.4 +/- 0.3 and i = 21.3 +/- 0.4 in the final exposures. The source is also present in archival imaging of the field from SDSS. Measuring the flux of the source in the same aperture in these images yields magnitudes of g=21.9, r=21.6, i=21.3, z=20.7. These observations suggest a faint optical afterglow superimposed on a host galaxy or Galactic foreground star. More observations are encouraged to characterize this object.