TITLE: GCN GRB OBSERVATION REPORT NUMBER: 229 SUBJECT: GRB990123: NIR Observation DATE: 99/01/26 19:56:17 GMT FROM: Angelo Antonelli at Obs. Astro. di Roma L.A. Antonelli, A. Di Paola, Osservatorio Astronomico di Roma, G. Gandolfi (BeppoSAX Scientific Operation Center) report on behalf of SWIRT Team and BeppoSAX Team: "On 25.16 (UT) January 1999, we imaged the Optical Transient field in the K band using the 1.1m AZT-24 telescope and the near-infrared camera/spectrometer SWIRCAM at the Campo Imperatore Astronomical Observatory (http://www.mporzio.astro.it/cimperatore/WWW/) operated by the Astronomical Observatory of Rome (O.A.R.). The 4'X4' field of view was exposed for 3300 s reaching the limiting magnitude in the K band of 17.9 +/- 0.2 mag. No source has been found within the errorbox of the O.T. (IAUC 7094). This observation provides a more compelling upper limit in K band with respect to the previous observation in the same band (GCN #214). The behaviour of the source between the two observation, at this wavelenght, is unknown. Further near infrared observations are in progress. This message may be cited."