GCN Circular 6090
H. Swan (U. Michigan), I. Smith (Rice), M. Skinner (AMOS Observatory, Boeing LTS), R. Russell, (Aerospace Corporation), report on behalf of the MARGE collaboration: The AEOS Burst Camera (ABC) on the AEOS telescope located at the Maui Space Surveillance System on Haleakala Maui began imaging Swift GRB070208 (GCN 6074 Sato et al) on Feb 8, 2007 at 09:22:38.11 UTC, ~12 minutes after the GRB was detected. These are unfiltered optical images. After coadding our 10s images in sets of 10, we find the OT first identified by Guidorzi et al. (GCN 6077). Using the SDSS data provided by Cool et al (GCN 6080), we calibrate the OT to the r band magnitude of the star located at RA=197.89688 Dec=61.97785. The approximate statistical errors are 0.2 magnitudes. We report the following magnitudes for the OT: time ABC mag 09:22:38.11 UT mag= 20.3 09:35:10.03 UT mag= 20.3 09:59:46.08 UT mag= 20.9 10:02:53.99 UT mag= 20.8 The Rice University CCD Camera (RUCCD) on the AEOS telescope also observed GRB 070208. Ic-band images were taken between 2007-02-08 09:49 UT and 10:35 UT. The results are consistent with the Palomar observations of Fox et al. (GCN 6078).