Supernova 2013at = Psn J18501129+3020595
Abstract
V. Lipunov, Sternberg Astronomical Institute (SAI), reports the discovery by S. Shurpakov of a possible supernova (mag 16.9) on two unfiltered survey CCD images (limiting mag 18.2) taken on Mar. 19.748 and 19.776 UT with the MASTER-Amur robotic telescope (0.40-m f/2.5 reflector). The new object is located at R.A. = 18h50m11s.29, Decl. = +30o20'59".5 (equinox 2000.0), which is 11".9 west and 15".1 south of the nucleus of the presumed host galaxy. D. Denisenko and E. Gorbovskoy (SAI) report that nothing is visible at this position on Feb. 24.860 images from the same telescope (limiting magnitude 18.0). The discovery and reference images are posted at website URL http://master.sai.msu.ru/static/OT/185011.29302059.5.png and at website URL http://master.sai.msu.ru/static/OT/J185011+302059-BRIR5x5.jpg. The variable was designated PSN J18501129+3020595 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2013at based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2013at: Mar. 21.144, 17.5 (F. Luppi and L. Buzzi, Varese, Italy; 0.38-m reflector; position end figures 11s.23, 59".7; image posted at website URL http://www.astrogeo.va.it/pub/TOCP/PSN_P2813322.jpg); 24.416, 17.3 (Joseph Brimacombe, Cairns, Australia; remotely with a 51-cm RCOS telescope + luminance filter at the New Mexico Skies observatory near Mayhill, NM, U.S.A.; position end figures 11s.23, 59".3; image posted at website URL http://www.flickr.com/photos/43846774@N02/8589123510/). Edo Berger, Maria Drout, Allyson Bieryla, Zoey Bergstrom, Ana-Maria Constantin, Sara Duval, Nina Hooper, Jonathan Jackson, Rachel Jiang, Alex Krolewski, Evan Liang, Erin Lotridge, Christopher Magnani, Missy Mcinstosh, Katie Rice, James Ryan, and Nuseir Yassin, Harvard University, obtained a low-resolution optical spectrum of PSN J18501129+3020595 = SN 2013at on Mar. 21.44 UT using the FAST spectrograph mounted on the F.L. Whipple Observatory 1.5-m telescope, as part of an undergraduate astronomy course. The spectrum exhibits strong hydrogen Balmer P-Cyg lines, indicating a type-II supernova. Using SNID (Blondin and Tonry 2007, Ap.J. 1024, 666), they find a best match with type-IIP supernova templates at a redshift of z = 0.02 and phase of +4 days.
- Publication:
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Central Bureau Electronic Telegrams
- Pub Date:
- March 2013
- Bibcode:
- 2013CBET.3448....1L