SUPERNOVA 2009U IN NGC 3831
G. Pignata, J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, P. Gonzalez, P. Lopez, S. Silva, G. Folatelli, D. Iturra, R. Cartier, F. Forster, and S. Marchi, Universidad de Chile; B. Conuel, Wesleyan University; and D. Reichart, K. Ivarsen, A. Crain, D. Foster, M. Nysewander, and A. LaCluyze, University of North Carolina at Chapel Hill, on behalf of the CHASE project, report the discovery of an apparent supernova (mag approximately 15.8 +/- 0.1) on an unfiltered image taken on Feb. 2.18 UT with the 0.41-m 'PROMPT 3' telescope located at Cerro Tololo. The new object, which is also present at mag approximately 16.1 +/- 0.2 in an image taken on Feb. 3.14, is located at R.A. = 11h43m18s.72 +/- 0".1, Decl. = -12°52'46".1 +/- 0".1 (equinox 2000), which is about 2".0 east and 4".3 south of the center of the galaxy NGC 3831.
Nothing is visible at this position on archival images taken on Jan. 18.22 (limiting mag 18) and 22.22 (limiting mag 18.5).

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars.

2009 February 3

(C) Copyright 2009 CBAT (CBET 1679)

Daniel W. E. Green