TITLE: GCN CIRCULAR NUMBER: 6146 SUBJECT: GRB 070224: MDM Observations DATE: 07/02/25 08:03:48 GMT FROM: Nestor Mirabal at Columbia U N. Mirabal, K. Stanonik, N. Zimmerman, S. Alayyoubi, & J. P. Halpern (Columbia U.) report on behalf of the MDM Observatory GRB follow-up team: "We observed the field of GRB 070224 (Racusin et al., GCNs 6137, 6143) in I-band with the MDM 1.3m telescope. The object reported by Thoene et al. (GCN 6142) is present in our images, with a preliminary magnitude I~22.1 +/- 0.2 on Feb. 25.287."