GRB 230204A/Swift J1552.8-5055: LCOGT Optical Counterpart Candidate

We observed the GRB 230204A/Swift J1552.8-5055 (D'Ai et al., GCN 33260) field with the LCOGT 1-meter Sinistro instrument at the Cerro Tololo Interamerican Observatory, Chile site, on February 4, from 07:24 to 7:57 UT (corresponding to 4.47 to 5.02 hours after GRB trigger time) with the Bessel R and I filters. We performed a series of 3x300s exposures in both bands. We detect a source consistent with the XRT enhanced error position (Evens et al., GCN 33261) that is not present in USNO, SkyMapper, or 2MASS catalogs. The coordinates for this candidate are: 238.19844d, -50.917039d. As the field is near the galactic plane, the field is quite crowded. It is possible that this source is present in the catalogs mentioned, but was not able to be resolved due to different plate scales. Future observations are planned to determine if the detected source is fading and other follow-up efforts are encouraged. The following magnitudes are calculated using the USNO-B1.0 catalog as reference: R = 17.75 +/- 0.02 I = 17.16 +/- 0.01 Due to the crowded field, these magnitudes may be contaminated by a nearby bright star. These magnitudes are not corrected for galactic extinction.