TITLE: GCN CIRCULAR NUMBER: 4 SUBJECT: GRB 971024: Refined analysis by USNOFS Observations DATE: 97/10/27 00:00:00 GMT FROM: Jeffrey A Munn at USNO/USRA GRB971024 #004 We reobserved the entire 90% confidence RXTE_ASM localization of GRB971024 (Trigger No. 6448, GCN notice of 24 Oct 97 22:41:47 UT) with the USNO, Flagstaff Station 1.0-m telescope in the R band, 48 hours after our first set of observations (which were obtained 14-14.5 hours after the GRB event). The two sets of frames (both approximately as deep as the DSS in this region) were blinked against each other. No significantly variable objects (approx. 1 mag) were detected to approximately R = 19 (in our previous notice, the first set of frames were blinked against DSS, and no significantly brighter objects in our frames were found). This message is citable in publications. J.A. Munn, F.J. Vrba, A.A. Henden, U.S. Naval Observatory, Flagstaff Station