TITLE: GCN CIRCULAR NUMBER: 5318 SUBJECT: GRB060708: MARGE low resolution spectrum observations DATE: 06/07/15 00:53:39 GMT FROM: Heather Swan at U.of Michigan/ROTSE H. Swan (U Mich), E. Rykoff (U Mich), S. Yost (U Mich), T. McKay (U Mich), C. Akerlof (U Mich), I. Smith (Rice), report on behalf of the MARGE collaboration: The AEOS Burst Camera (ABC) on the AEOS 3.63m telescope, located at the Maui Space Surveillance System on Haleakala, observed the optical counterpart to GRB 060708 (Swift trigger 217805, Moretti, et al, GCN 5292). Over 160 10-s images were taken between 2006-07-08 12:33:14.19 UT (1035 s after the burst), and 14:16:21.78 UT (7222s after the burst), with low resolution (R~10) grating spectroscopy. The OT is clearly detected in individual images, and fades during the observation. The position of the OT is: 00:31:13.85 -33:45:33.0 (J2000) consistent with the UVOT position (Schady and Moretti, GCN 5296). At 12:33:14.19 UT, the OT is approximately 17.7 mag (R equivalent, relative to a nearby 14th magnitude USNO B1.0 star). The low resolution grating on the ABC is designed to study the color evolution of the early afterglow.