Supernova 2011dr in Pgc 64099 = Psn J20062026-4245581
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2011
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Abstract
Report the discovery of an apparent supernova in public images from the Siding Spring Survey (SSS), with the discovery observation tabulated below: SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011dr May 25.82 20 06 20.26 -42 45 58.1 17.8 9".7 W, 7".0 S The variable was designated PSN J20062026-4245581 when posted on the Central Bureau's TOCP webpage and is here designated SN 2011dr based on the spectroscopic confirmation below. Additional magnitudes for 2011dr: Apr. 30.73 UT, [19.2 (SSS); May 26.732, 17.0 (Joseph Brimacombe, Coral Towers Observatory, Cairns, Australia; 30-cm telescope + STL6K camera + red filter; position end figures 20s.28, 56".5). Brimacombe's image is posted at website URL http://www.flickr.com/photos/43846774@N02/5763117132/. S. Valenti and S. Benetti, Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova, on behalf of a larger collaboration, report that a spectrogram (range 330-750 nm; resolution 1.5 nm) of PSN J20062026-4245581 = SN 2011dr, obtained on June 26.40 UT with the European Southern Observatory's New Technology Telescope (+ EFOSC), is that of a type-IIP supernova. After cross-correlation with a library of supernova spectra via the "GELATO" code (Harutyunyan et al. 2008, A.Ap. 488, 383; available at website URL https://gelato.tng.iac.es/login.cgi), the spectrum of SN 2011dr appears to be very similar to that of SN 1999gi (Leonard et al. 2002, A.J. 124, 2490) at one month after explosion....