Supernova 2013?? in IC 4329 = Psn J13485917-3017265
Abstract
Ella Sanders Kot and R. Kot, Truth or Consequences, NM, U.S.A.; and D. Coffin, University of Iowa, report the discovery of an apparent supernova (mag 15.2) on a 180-s unfiltered CCD image taken with the 0.37-m f/14 Rigel telescope at the Iowa Robotic Observatory near Sonoita, AZ, U.S.A., on Dec. 13.544 UT. The new object is located at R.A. = 13h48m59s.17, Decl. = -30o17'26".5 (equinox 2000.0), which is 92" west and 18".4 north of the nucleus of IC 4329. E. S. Kot adds that a follow-up image taken on Dec. 16.53 shows the variable at mag 14.8 (with position end figures measured as 59s.19, 26".9). The variable was designated PSN J13485917-3017265 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2013?? based on the spectroscopic confirmation reported below. D. Sand, Texas Tech University; and S. Valenti, D. A. Howell, J. Parrent, and I. Arcavi, Las Cumbres Observatory Global Telescope and University of California at Santa Barbara, report that a spectrogram of PSN J13485917-3017265 = SN 2013?? was obtained with FLOYDS (wavelength range 320-1000 nm) on the "Faulkes Telescope South" on Dec. 17.72 UT. The spectrum reveals 2013?? to be a type-Ia supernova around five days before maximum light, with a Si 615.0-nm absorption minimum at a velocity of about 12000 km/s. The redshift of the supernova is consistent with that of the host galaxy, IC 4329 (z = 0.01514; Smith et al. 2000, MNRAS 313, 469). Classification was performed via supernova-spectrum cross-correlation using SNID (Blondin and Tonry 2007, Ap.J. 666, 1024).
- Publication:
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Central Bureau Electronic Telegrams
- Pub Date:
- December 2013
- Bibcode:
- 2013CBET.3761....1K