TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1180 SUBJECT: GRB 011130, K band observations DATE: 01/12/06 05:16:40 GMT FROM: James Rhoads at STScI James Rhoads, Andy Fruchter, and Ingunn Burud report: We observed the location of the candidate radio counterpart to XRF 011130 on 2001 December 5.37 UT in the K' filter with the NASA IRTF + NSFCam. Within the combined astrometric uncertainty of the IRTF and radio data, which we estimate at 2" radius, we find one and probably two sources. The first is clearly the same object reported by Jha et al (GCNC 1179). The second is 1.66" to the SW and considerably fainter, near the detection limit for the image. Photometric calibration is not presently available, but further observations are planned. A very rough zero point (based on calibration on a different night with the same instrument) suggests K=18.1 for the brighter source, making the source very red (R-K ~ 4) if this zero point is correct. Additionally, we expect to improve the astrometry shortly using comparison to wider field optical data.