SN 2014ah (A.R., 11 55 30.83 Dec. +11 55 26.3), scoperta il 12 marzo 2014 nella galassia pgc 37426 (offset 4E 0N), magnitudine 15.4, tipo: Ia
PSN individuata da S. Leonini, G. Guerrini, P. Rosi, L.M. Tinjaca Ramirez and M. Conti con il telescopio Newton da 53cm dell'Osservatorio di Montarrenti (Siena).
Electronic Telegram No. 3835 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Hoffman Lab 209; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: Questo indirizzo e-mail è protetto dallo spam bot. Abilita Javascript per vederlo. (alternate Questo indirizzo e-mail è protetto dallo spam bot. Abilita Javascript per vederlo. ) URL http://www.cbat.eps.harvard.edu/index.html Prepared using the Tamkin Foundation Computer Network SUPERNOVA 2014ah IN PGC 37426 = PSN J11553083+1155263 Simone Leonini, Siena, Italy, reports the discovery of an apparent supernova (mag about 15.4) by himself with M. Conti, G. Guerrini, P. Rosi, and L. M. Tinjaca Ramirez on two unfiltered CCD images (limiting mag about 18.6) taken on Mar. 12.002 UT in the course of the Italian Supernovae Search Project using a 0.53-m f/8.7 Ritchey-Chretien telescope (+ Apogee Alta U47 camera) at their Montarrenti Observatory. The new object is located at R.A. 11h55m30s.83 +/- 0".2, Decl. = +11d55'26".3 +/- 0".2 (equinox 2000.0), which is 4" east of the nucleus of the galaxy PGC 37426 = MCG +02-30-44. No stellar source is visible at this position on their previous image taken on Mar. 3 (limiting mag about 19.0). The discovery image is posted at website URL http://www.astrofilisenesi.it/public/Sne/Uploads/PSN_PGC037426.jpg. The variable was designated PSN J11553083+1155263 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2014ah based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2014ah: Mar. 12.993, 16.3 (Gianluca Masi, Francesca Nocentini, and Patrick Schmeer; remotely using a 43-cm telescope near Ceccano, Italy; position end figures 30s.87, 26".3); 12.995, V = 16.5 (Massimiliano Martignoni, Magnago, Italy; 0.25-m Schmidt-Cassegrain reflector; position end figures 30s.85, 24".9); 14.120, 17.1 (Federica Luppi and Luca Buzzi, Varese, Italy; position end figures 30s.84, 26".1; reference stars from CMC-14 catalogue; image posted at URL http://www.astrogeo.va.it/pub/TOCP/PSN_P37426.jpg); 15.084, 16.1 (S. Foglia and G. Galli, Pogliano Milanese, Italy; 0.28-m f/6.8 reflector + ST8XME camera; position end figures 30s.89, 26".3; UCAC-4 reference stars). P. Ochner, S. Benetti, L. Tomasella, E. Cappellaro, A. Pastorello, N. Elias-Rosa, and M. Turatto, Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica, report that an optical spectrogram (range 335-790 nm; resolution 0.9 nm) of PSN J11553083+1155263 = SN 2014ah, obtained on Mar. 10.98 UT with the Asiago 1.22-m Galileo Telescope (+ Boller & Chivens spectrograph), shows it to be a type-Ia supernova. Adopting for the host galaxy (PGC 37426 = MCG +02-30-44 = CGCG 68-91) a radial velocity of 6303 km/s (SDSS Data Release 4, via NED), a good match is found with the spectrum of SN 2003du (Stanishev et al. 2007, A.Ap. 469, 645) about a week before maximum light. The expansion velocity, deduced from the Si II 635.5-nm absorption, is about 10400 km/s. The Asiago classification spectra are posted at website URL http://sngroup.oapd.inaf.it; classification was made via GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383) and SNID (Blondin and Tonry 2007, Ap.J. 666, 1024). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2014 CBAT 2014 March 22 (CBET 3835) Daniel W. E. Green