Electronic Telegram No. 2332 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Room 209; Dept. of Earth and Planetary Sciences; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbat@iau.org; cbatiau@eps.harvard.edu URL http://www.cfa.harvard.edu/iau/cbat.html TWO APPARENT NOVAE IN M81: M81N 2010-06a AND M81N 2010-06b Kamil Hornoch, Astronomical Institute, Ondrejov; Peter Garnavich, Colin Littlefield, and Nancy Paul, University of Notre Dame; and Samia Bouzid, Rutgers University, report their discovery of two apparent novae in the galaxy M81 on a co-added 1200-s R-band CCD frame taken by Garnavich, Littlefield, Paul, and Bouzid with the Vatt4k imager on the 1.83-m Vatican Advanced Technology Telescope on June 11.164 UT. The new objects are visible on single 200-s images used for the co-added image. Narrow-band H_alpha CCD frames taken by Daniel J. Hurley, University College, Cork; and Hannu Parviainen and Hans J. Deeg, Instituto de Astrofisica de Canarias and Universidad de La Laguna, with the 2.54-m Isaac Newton Telescope (+ WFC) at La Palma on June 14.893 and 15.920 confirmed the presence of both new objects, which are not present on numerous archive images from the 2.54-m Isaac Newton Telescope, the 4.2-m William Herschel Telescope, the 4-m Mayall telescope, and the 8.2-m Subaru telescope, down to limiting magnitudes as faint as Sloan r' = 23.3, R = 23.4, V = 23.8, and [H_alpha] = 22.3. M81N 2010-06a is located at R.A. = 9h55m48s.85, Decl. = +69o03'26".4 (equinox 2000.0), which is 84".0 east and 28".7 south of the center of M81. Available R-band and [H_alpha] magnitudes for M81N 2010-06a, measured by Hornoch: June 11.164 UT, R = 21.2 +/- 0.15 (Garnavich, Littlefield, Paul, and Bouzid, 1.83-m telescope); 14.893, [H_alpha] = 21.1 +/- 0.2 (Hurley, Parviainen, and Deeg, 2.54-m telescope); 15.920, [H_alpha] = 21.3 +/- 0.15 (Hurley, Parviainen, and Deeg). M81N 2010-06b is located at R.A. = 9h55m19s.39, Decl. = +69o06'20".6 (equinox 2000.0), which is 73".8 west and 145".5 north of the center of M81. Available magnitudes for M81N 2010-06b: June 11.164, R = 21.9 +/- 0.2 (Garnavich, Littlefield, Paul, and Bouzid); 14.893, [H_alpha] = 20.0 +/- 0.1 (Hurley, Parviainen, and Deeg; 15.920, [H_alpha] = 19.9 +/- 0.1 (Hurley, Parviainen, and Deeg). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2010 CBAT 2010 June 19 (CBET 2332) Daniel W. E. Green