[IAUC] CBET 1570: 20081117 : SUPERNOVAE 2008hb-2008hf

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                                                  Electronic Telegram No. 1570
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html


SUPERNOVAE 2008hb-2008hf
     D. Sand, Center for Astrophysics and Las Cumbres Observatory Global
Telescope Network; M. L. Graham, University of Victoria; S. Herbert-Fort
and D. Just, Steward Observatory; C. Bildfell, C. J. Pritchet, and H.
Hoekstra, University of Victoria; and S. Sivanandam and D. Zaritsky, Steward
Observatory, report the discovery of five supernovae on g'- and r'-band
images obtained at the Canada-France-Hawaii Telescope (+ Megacam).  The
Megacam photometry given below all have uncertainty within +/- 0.1 mag.

 SN       2008 UT      R.A. (2000.0) Decl.        g'      Offset
 2008hb   Sept. 21    22 25 14.03  - 1 43 11.8   21.8        --
 2008hc   Sept. 21    23 38 27.52  +23 33 44.3   21.6    0".58 E, 1".59 N
 2008hd   Sept. 24    23 54 07.84  -10 15 43.4   20.2    0".94 W, 0".1 S
 2008he   Oct.  31     0 19 31.22  +28 51 45.0   22.4    0".90 E, 1".46 N
 2008hf   Nov.   3     9 19 43.36  -12 14 02.1   21.9    1".38 E, 0".99 S

No host galaxy is seen for 2008hb (to limiting magnitudes g' about 23.5 and
r' about 23.5).  The apparent host galaxy for 2008hc has g' = 20.51 +/- 0.04
and r' = 19.85 +/- 0.04.  The apparent host galaxy for 2008hd has g' = 21.61
+/- 0.02 and r' = 21.11 +/- 0.02.  The apparent host galaxy for 2008he has
g' = 19.25 +/- 0.02 and r' = 18.64 +/- 0.03.  The apparent host galaxy for
2008hf has g' = 22.88 +/- 0.07 and r' = 21.45 +/- 0.02.  Additional r'
magnitudes are tabulated below, together with spectroscopic results.
Additional magnitudes for 2008hd on Oct. 27:  g' = 22.3, r' = 21.2.
Spectroscopic confirmation was obtained with the Blue Channel Spectrograph
on the MMT; the publicly available Supernova Identification code of Blondin
and Tonry (2007, Ap.J. 666, 1024) was utilized in the analysis.  The spectra,
finding charts, and discovery images are all available upon request.  The
spectrum of 2008hd is similar to that of the peculiar type-Ia supernova
2000cx around maximum light.

          Additional
          Photometry             Spectroscopy            Days Before/
 SN       Date UT         r'     Date 2008 UT    Type    After Maximum    z
 2008hb   2008 Sep. 21   21.5     Sept. 30        Ia          0          0.31
 2008hc   2008 Sep. 21   21.2     Sept. 30        Ia        +10          0.25
 2008hd   2008 Sep. 24   20.4     Sept. 30        Ia-p        0          0.08
 2008he   2008 Oct. 31   22.1     Nov.   5        Ia         -5          0.10
 2008hf   2008 Nov.  3   21.5     Nov.   5        Ia         -3          0.33


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2008 CBAT
2008 November 17                 (CBET 1570)              Daniel W. E. Green