2008CBET.1245....1Y

F. Yuan, University of Michigan; R. Quimby, California Institute of Technology; M. D. Sisson, D. Chamarro, and C. Akerlof, University of Michigan; and J. C. Wheeler, University of Texas, on behalf of the ROTSE collaboration, report the discovery of three type-Ia supernovae in unfiltered CCD images taken with the 0.45-m ROTSE-IIIb telescope at McDonald Observatory. SN 2008 UT R.A. (2000.0) Decl. Mag. Offset z 2008ab Jan. 30.23 11 34 45.92 +53 57 50.8 18.2 0.069 2008ac Jan. 30.27 11 53 45.18 +48 25 21.5 17.6 0".4 W, 0".5 N 0.053 2008ad Jan. 30.42 12 49 37.15 +28 19 46.5 18.0 3".5 E, 1".7 N 0.054 A faint (r = 20.65) galaxy is seen at the position of 2008ab in the Sloan Digital Sky Survey (SDSS); a finding chart for 2008ab is posted at http://rotse.net/rsvp/j113445.9+535751/j113445.9+535751.jpg. A finding chart for 2008ac is at http://rotse.net/rsvp/j115345.2+482521/j115345.2+482521.jpg. A finding chart for 2008ad can be found at the following website URL: http://rotse.net/rsvp/j124937.2+281946/.