------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 2903 2013 Mar 21 20.14UT 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 ------------------------------------------------------------------- GK PERSEI The AAVSO carry news on Special Notice 343 that an outburst of the 1901 nova GK Per appears to be underway. It is known to have dwarf nova outbursts: 2013 March 11.03 UT, 13.0 (John Bortle, Stormville, NY); 12.87, 12.8 (Bill Wilson, Grange over Sands, Cumbria, England); 14.83, 12.7 (Gary Poyner, Birmingham, England); 15.86, 12.4 (Luigi Palazzi, Italy); 16.31, 12.25 (Michael Linnolt, HI, USA); 17.82, 12.3 (Poyner); 17.86, 12.251 CV +/-0.075 (Darlington) The last observed outburst was in March 2010, when it reached V=9.7 Coverage of GK Per has been sufficiently continuous to deduce that no outburst has been missed since 2010. Coordinates: R.A. 03 31 12.01 Dec. +43 54 15.4 (2000.0) Charts are available from the website catalogue of the BAAVSS. http://www.britastro.org/vss/ SUPERNOVA 2013ah IN UGC 5201 (THU-NAOC TRANSIENT SURVEY) 2013ah Feb 22.60 09 44 33.80 +55 45 44.4 18.6 18.0"W 1.6"S Jinghua Gao: spectrum Mar 1 type-Ia a few days before maximum SUPERNOVA 2013ai IN NGC 2207 (E> CONSEIL, IRAP) 2013ai Mar 1.66 06 16 18.35 -21 22 32.9 17.4R 51 "W 11 "S Images at: http://cador.obs-hp.fr/sn_tarot/PSN_J06161835-2122329/ M. Fraser: spectrum Mar 3 young type-II supernova SUPERNOVA 2013aj IN NGC 5339 (GIANCARLO CORTINI) 2013aj Mar 3.14 13 54 00.68 -07 55 43.8 14.7 6 "E 8 "N Image at: http://www.astrogeo.va.it/pub/TOCP/PSN_N5339.jpg Jujia Zhang: spectrum Mar 4 type-Ia a few days before maximum Guy M Hurst