Electronic Telegram No. 1549 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 2008gm IN NGC 7530 G. Pignata, J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, P. Gonzalez, P. Lopez, S. Silva, G. Folatelli, D. Iturra, R. Cartier, and F. Forster, 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 17.0 +/- 0.2) on an unfiltered image taken on Oct. 22.09 UT with the 0.41-m 'PROMPT 3' telescope located at Cerro Tololo. The new object is located at R.A. = 23h14m12s.39 +/- 0".1, Decl. = -2o46'52".4 +/- 0".1 (equinox 2000), which is about 7".3 east and 7".0 south of center of the galaxy NGC 7530. Nothing is visible at this position on archival images taken on Aug. 29.12 and Oct. 1.13 (limiting mag 18.0). SN 2008gm is also present in images taken on Oct. 16.08 (at mag approximately 17.2 +/- 0.2) and on Oct. 19.08 (at mag approximately 17.3 +/- 0.2). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2008 CBAT 2008 October 22 (CBET 1549) Daniel W. E. Green