------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 2821 2012 May 12 19.08UT Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074 INTERNET: GUY@TAHQ.DEMON.CO.UK Backup: gmh@wdcc1.bnsc.rl.ac.uk WORLD WIDE WEB http://www.theastronomer.org ------------------------------------------------------------------- NOVA SAGITTARII 2012 = PNV J17452791-2305213 Stanislav Korotkiy, Ka-Dar Observatory; and Kirill Sokolovsky, Astro Space Center, Lebedev Physical Institute, and Sternberg Astronomical Institute, Moscow State University, report the discovery on CBET 3089 of a possible magnitude 9.6 nova on three 30-s unfiltered CCD images (limiting magnitude about 14.0) of 2012 Apr. 21.011 UT with a 135-mm-f/2 lens + ST8300M camera) at Ka-Dar Observatory's TAU Station near Nizhny Arkhyz, Russia. The new object is located at: RA 17h 45m 28.03s DEC -23 05' 22.8" (2000). There is a red USNO-B1.0-catalogued star (magnitudes R1 = 16.21, B2=18.61) 0.6" away from the variable's position. Their discovery images are posted at: http://www.astroalert.su/files/pnv_j17452791-2305213.jpg Additional magnitudes: Apr. 17.99, [14.0 (Korotkiy and Sokolovsky); 20.84, 10.2 (R. J. Gao, China); 21.65, 8.8 (John Seach, Australia); 22.35, V = 9.58 (Seiichiro Kiytota, Japan, remotely via Mayhill). Ernesto Guido et.al, advises TA of their confirmation on Apr 22.4UT at magnitude 9.1 using a 0.25-m f/3.4 reflector, remotely from Mayhill; position end figures 28s.02, 23".2. They have posted a comparison of their image and a red 1996 plate from the Digitised Sky Survey: http://bit.ly/IIV8oN Christian Buil has obtained a spectrogram with a 0.28-telescope at the Castanet Observatory in France on Apr. 23.032 UT that shows an intense H_alpha broad emission with FWHM = 5600 km/s. He notes that the object seems very reddened and looks like a nova. Kazuyoshi Imamura, Okayama University of Science team, reports that a spectrogram on Apr. 23.739 UT using the 0.28-m Schmidt-Cassegrain telescope suggests the object is a classical nova. SUPERNOVA 2012bd (MASTER) 2012bd Mar 14.83 16 31 05.47 +61 55 48.4 18.1 L. Tomasella: spectrum Mar 18 type-II similar to SN 1997D. SUPERNOVA 2012be (CSS) 2012be Feb 21.29 11 20 52.36 +51 32 30.2 18.0 L. Magill: spectrum Mar 14 type-Ia similar to SN 2003du at epoch 12-19 days. SUPERNOVA 2012bf (CSS) 2012bf Feb 10.43 15 13 41.81 +16 06 06.6 18.5 0".9 E L. Magill: spectrum Mar 15 type-Ia similar to SN 2004eo. SUPERNOVA 2012bg (CSS) 2012bg Feb 19.29 11 29 11.20 +36 00 20.6 18.3 0".9 E L. Magill: spectrum Mar 15 type-II similar to SN 2004et at epoch 15-20 days. Guy M Hurst