2011CBET.2631....4H

Kamil Hornoch and Miroslav Velen, Astronomical Institute, Ondrejov; and Petra Hornochova, report their discovery of M31N 2011-01a on a co-added 1080-s R-band CCD frame taken on Jan. 8.788 UT with the 0.65-m telescope at Ondrejov. The new object is well visible on the co-added frame, as well as on single images used for the co-added frame, but is not present on numerous archival images taken at Lelekovice and Ondrejov. Available R-band magnitudes for M31N 2011-01a, as measured by Hornoch: 2011 Jan. 3.732 UT, [21.2 (K. Hornoch and B. Mikulecka, 0.65-m telescope at Ondrejov); 5.863, [19.3 (Hornoch and M. Wolf, 0.65-m telescope at Ondrejov); 8.788, 17.09 ± 0.07 (Hornoch, Velen, and Hornochova, 0.65-m telescope at Ondrejov); 9.741, 14.7 ± 0.3 (Hornoch and Hornochova, 0.65-m telescope at Ondrejov, poor conditions). M31N 2011-01a is located at R.A. = 0:42:42.65, Decl. = +41:19:14.7 (equinox 2000.0), which is 19" west and 186" north of the center of M31.