------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 3015 2014 Jly 26 10.15UT 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 ------------------------------------------------------------------- EE CEPHEI ECLIPSE AND COMPARISON STARS The eclipse of EE Cep (TA E-Circular 3013) appears to be gradually beginning, according to observations in the AAVSO Database. Regarding the comparison stars for this EE Cep campaign, the AAVSO ask you to please read the information in the previous TA circular. The Polish campaign is underway and identified comparison stars to be used. However, the R and I magnitudes they give are JOHNSON magnitudes. The AAVSO recommends using COUSINS filters for R and I observations. The Cousins magnitudes are in the AAVSO photometry table for EE Cep. IMPORTANT: If you use COUSINS filters to observe, please be sure to use COUSINS magnitudes to reduce your observations - do not use Johnson magnitudes to reduce Cousins data!! Finder charts for EE Cep with sequence may be created using the AAVSO Variable Star Plotter (VSP, http://www.aavso.org/vsp). The AAVSO photometry table for EE Cep includes the four comparison stars suggested by Galan et al. for their campaign: 104 (000-BCQ-031), 112 (000-BCQ-029), 113 (000-BCQ-036), and 119 (000-BCQ-040). They recommend using one or more of these stars for performing photometry, and we encourage observers to use the AAVSO comparison star magnitudes found in VSP for these stars. Information on submitting observations to the AAVSO may be found at: http://www.aavso.org/webobs SUPERNOVA 2014be (NAOC) 2014be May 7.76 16 09 35.12 +42 26 30.4 18.6 4.6"S Jujia Zhang: spectrum May 14 type Ia around maximum. SUPERNOVA 2014bf IN MCG +03-41-7 (NAOC) 2014bf May 22.72 15 57 35.23 +18 01 47.6 17.4 0.3"E 6.2"N J.-j. Zhang: spectrum May 24 type-IIP around maximum SUPERNOVA 2014bg IN UGC 9396 (BOMBARDINI and BENAZZI) 2014bg Jun 5.98 14 35 45.90 +24 43 17.9 17.0 2 "E 13 "S Dave Balam, Dominion Astrophysical Observatory, National Research Council of Canada: spectrum June 6 with 1.82-m Plaskett Telescope indicates type-Ia 1 day post maximum. SUPERNOVA 2014bh KUG 1222+216 (THU-NAOC SURVEY) 2014bh May 22.65 12 24 56.68 +21 21 41.0 17.4 2.6"E 4.5"N J.-j. Zhang: spectrum May 25 type-Ia around maximum Adopting a redshift of 0.0557 for the host galaxy from the narrow emission line, they measure a velocity of the Si II 635.5-nm absorption feature to be about 7400 km/s. The weak absorption feature at 638.0 nm is likely due to the C II 658-nm line. These features are reminiscent of the behaviour of super-Chandrasekhar-mass supernova such as SN 2009dc. Guy M Hurst