Electronic Telegram No. 2043 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) CBAT@CFA.HARVARD.EDU (science) URL http://www.cfa.harvard.edu/iau/cbat.html SUPERNOVA 2009lt T. Kryachko and B. Satovskiy, Astrotel Observatory, Kazan State University, report the discovery of an apparent supernova (mag approximately 19.7) on unfiltered images (limiting mag 21.5) taken on Nov. 21.65 and 22.70 UT with a 30-cm Takahashi FRC-300 telescope (+ Apogee Alta U9000 CCD camera) at Karachay-Cherkessia, Russia. The new object is located at R.A. = 1h30m54s.49 +/- 0".1, Decl. = +18d36'39".9 +/- 0".1 (equinox 2000.0), which is about 4".5 west and 3".5 north of the center of the apparent host galaxy (position end figures 54s.79, 36".4). Nothing is visible at this position on a Palomar Sky Survey plate obtained on 1987 Aug. 26, via the Digitized Sky Survey (DSS) (limiting blue mag 21.5). The discovery image is posted at website URL http://www.makhaon.com/_files/OBJ+DSS2R_blink.gif. Following posting on the Central Bureau's unconfirmed-objects webpage, L. Elenin reports that he measured red mag 19.3 and position end figures 54s.50, 40".2 for 2009lt from images obtained on Nov. 24.216 UT by M. Schwartz with the Tenagra II 0.81-m telescope, adding that nothing is visible at this position on DSS images from 1954 Oct. 5 (limiting red mag 19.5) and 1990 Sept. 18 (limiting red mag 20.5). Elenin adds that O. Spiridonova also obtained confirming images with the Special Astrophysical Observatory (Russian Academy of Sciences) 1-m telescope at Zelenchuk on Nov. 23.83, yielding magnitudes R = 19.7 and B = 20.6 (measured by T. Kryachko); these images are posted at website URLs http://www.makhaon.com/_files/obj_B_filter.jpg and http://www.makhaon.com/_files/obj_R_filter.jpg. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2009 CBAT 2009 November 24 (CBET 2043) Daniel W. E. Green