2009CBET.1961....1S

Further to CBET 1894, 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 that six supernovae were discovered with g' and r'-band images obtained at the Canada-France-Hawaii Telescope (+ Megacam). Spectroscopy was obtained with the Blue Channel Spectrograph on the MMT, as noted below. 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 ---------------------------------------------------------------------------— 2009jj Aug. 16 22 27 07.85 +17 14 36.6 19.2 19.2 0.107 2009jk Aug. 24 6 31 03.17 +24 49 13.4 23.0 21.7 0.07 2009jl Sep. 12 22 23 22.92 - 1 32 26.5 22.3 22.0 0.30 2009jm Sep. 12 22 50 14.06 +10 33 35.1 22.2 21.8 0.29 2009jn Sep. 12 22 51 39.17 +11 16 55.7 21.9 21.5 0.29 2009jo Sep. 16 0 40 42.33 - 9 31 54.4 21.8 21.5 0.31 ---------------------------------------------------------------------------—

SN 2009jj, which appears centered on its host galaxy (whose magnitudes are g' = 18.4, r' = 17.6), appeared on Sept. 19 to be a normal type-Ia supernova around 25 days past maximum; additional Megacam magnitudes for 2009jj: Sept. 12, g' = 20.5, r' = 19.7.

The spectrum of 2009jk, which is 1".9 west and 4".3 south of its host galaxy (whose magnitudes are g' = 17.8, r' = 16.8), appeared on Sept. 19 to be similar to that of the type-IIP supernova 1999em, roughly 60-70 days after explosion; additional Megacam magnitudes for 2009jk: g' = 23.5, r' = 21.9.

The spectrum of 2009jl (which is apparently hostless down to approximate limiting magnitudes 24.5 in g' and r') on Sept. 19 was that of a normal type-Ia supernova around maximum.

SN 2009jm, which is 0".3 east and 1".1 north of its host galaxy (which itself has magnitudes g' = 20.5, r' = 19.6), was found on Sept. 19 to be a normal type-Ia supernova around 10 days past maximum.

SN 2009jn, which is 0".2 east and 0".2 south of the center of its host galaxy (which has magnitudes g' = 23.1, r' = 22.4), was found on Sept. 19 to be a normal type-Ia supernova around maximum.

SN 2009jo, which is 4".3 west and 1".1 north of its host galaxy (which has magnitudes g' = 21.0, r' = 20.2), was found on Sept. 19 to be a normal type-Ia supernova around one week past maximum.