2009CBET.2089....1S

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).

The Nov. 24 spectroscopy shows that SN 2009ml was around one month past maximum; Megacam magnitudes from Nov. 11 for 2009ml: g' = 22.2, r' = 21.4. SN 2009ml is located 0".1 west and 0".1 north of its host galaxy (which itself has magnitudes g' = 23.1 and r' = 22.8).

SN 2009mm is located 0".5 west and 0".7 north of its host galaxy (which itself has magnitudes g' = 20.8 and r' = 19.9). SN 2009mm, which was around one month past maximum from the spectroscopy, had Megacam magnitudes g' = 22.3, r' = 21.2 on Nov. 15.

SN 2009mn, which has no visible host galaxy down to limiting r' and g' magnitudes of about 24, was around two months past maximum at the time of the spectroscopy; additional Megacam magnitudes from Nov. 14: g' = 23.4, r' = 22.2.

SN 2009mo, which is 0".22 east and 3".26 north of its host galaxy (which itself has magnitudes g' = 18.2 and r' = 17.6), was around two months past maximum at the time of the spectroscopy; additional Megacam magnitudes for 2009mo from Nov. 15: g' = 22.1, r' = 21.1.

SN 2009mp is located 0".1 west and 0".2 south of its host galaxy (which itself has magnitudes g' = 20.1 and r' = 19.2). SN 2009mp, which was around one month past maximum from the spectroscopy, had Megacam magnitudes g' = 22.1, r' = 21.1 on Nov. 15.

SN 2009mq, which is located 0".2 west and 0".9 north of its host galaxy (which itself has magnitudes g' = 20.6 and r' = 20.2), was around five days before maximum at the time of the spectroscopy.

SN 2009mr, which is located 0".2 east and 0".2 north of its host galaxy (which itself has magnitudes g' = 17.7 and r' = 16.9), was around one week past maximum at the time of the spectroscopy.

SN 2009ms, which was near maximum at the time of the spectroscopy, appears centered on its host galaxy (which itself has magnitudes g' = 19.1, r' = 18.6).