Supernovae 2009ly and 2009ml-2009ms
Abstract
Further to CBET 1961, D. Sand, Harvard-Smithsonian Center for Astrophysics and the Las Cumbres Observatory Global Telescope Network; M. L. Graham and C. Bildfell, University of Victoria; S. Herbert-Fort, D. Just, and S. Sivanandam, Steward Observatory; C. J. Pritchet, University of Victoria; H. Hoekstra, Leiden University; and D. Zaritsky, Steward Observatory, report the discovery of eight normal-type-Ia supernovae on g' and r'-band images obtained at the Canada-France-Hawaii Telescope (+ Megacam), along with an independent discovery of the type-Ia supernova 2009ly (cf. CBET 2056). The spectroscopy for each supernova was obtained on Nov. 24 UT with the MMT and the Blue Channel Spectrograph; the publicly available Supernova Identification code of Blondin and Tonry (2007, Ap.J. 666, 1024) was utilized for determining spectroscopic types. The objects' discovery magnitudes and spectroscopic redshifts (z) are tabulated below: SN 2009 UT R.A. (2000.0) Decl. g' r' z 2009ly Nov. 19 0 41 12.66 - 9 08 54.7 19.0 18.6 0.05 2009ml Oct. 14 23 53 33.47 -10 09 49.9 20.9 21.0 0.21 2009mm Oct. 15 2 56 23.61 +41 40 31.6 20.6 20.6 0.17 2009mn Oct. 15 6 31 36.88 +25 19 35.9 21.8 21.5 0.25 2009mo Oct. 17 9 14 24.15 +15 51 10.3 21.5 20.2 0.07 2009mp Oct. 17 9 23 59.78 +14 06 47.7 21.5 20.2 0.13 2009mq Nov. 11 23 44 59.82 - 3 59 13.7 20.1 20.1 0.04 2009mr Nov. 15 22 25 59.56 +17 13 33.0 20.1 19.5 0.11 2009ms Nov. 18 10 39 55.40 +39 48 10.9 20.0 20.0 0.11 The spectroscopy indicates that SN 2009ly was around 20 days past maximum on Nov. 24; 2009ly is located 3".7 west and 5".6 north of its host galaxy (which itself has magnitudes g' = 16.8 and r' = 16.0).
- Publication:
-
Central Bureau Electronic Telegrams
- Pub Date:
- December 2009
- Bibcode:
- 2009CBET.2089....1S