TITLE: GCN CIRCULAR NUMBER: 11904 SUBJECT: GRB 110407A: NOT optical observations DATE: 11/04/08 01:20:18 GMT FROM: Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst Daniele Malesani (DARK/NBI), Paul Vreeswijk (Univ. Iceland), Dong Xu (WIS), Johan Fynbo (DARK/NBI), Pall Jakobsson (Univ. Iceland), Ingvar Svardh (NOT), and Martin Nielsen (NOT), report on behalf of a larger collaboration: We observed the field of GRB 110407A (Wolf et al., GCN 11895) with the Nordic Optical Telescope equipped with MOSCA. Observations were carried out in the R band, with a seeing of ~1.6", for a total observation time of 50 minutes. The mean time of the observation was Apr 7.943 UT (8.52 hr after the GRB). At the position of the optical and X-ray transient (Chuang et al., GCNs 11899, 11901; Evans et al., GCN 11903), we detect a source close to the detection limit. Its magnitude is R = 23.2 +- 0.20 (Vega) based on calibration against the SDSS r band.