[IAUC] IAUC 8766: 2006jf-2006ld; C/2006 M4 [25139-2007/05-R1]

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                                                  Circular No. 8766
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVAE 2006jf-2006ld
     J. Frieman, on behalf of the Sloan Digital Sky Survey II
collaboration, reports the discovery of 48 new supernovae (2006jf-
2006kd and 2006kg-2006lc; magnitude range g = 19.8-23.3) on images
taken during Sept. 11-Oct. 21 (details on CBETs 680 and 688).  All
appear to be apparent or possible type-Ia supernovae except for
2006jo and 2006jx (apparent or possible type Ib); 2006kg, 2006kh,
2006kn, and 2006kv (apparent or possible type II); 2006jl (IIn);
and 2006lc (probable type-Ic).
     In addition, three additional apparent supernovae have been
discovered on unfiltered CCD images:  2006ke and 2006kf by J.
Schwehr, D. Madison, and W. Li (LOSS/KAIT; cf. IAUC 8762); and
2006ld by the "Nearby Supernova Factory" collaboration (details on
CBET 689).

SN      2006 UT       R.A.  (2000.0)  Decl.   Mag.     Offset
2006ke  Oct. 19.51   5 52 37.38  +66 49 00.5  18.7  7".0 E, 2".6 N
2006kf  Oct. 21.46   3 41 50.48  + 8 09 25.0  17.4  5".5 W, 10".6 S
2006ld  Oct. 19.3    0 35 27.81  + 2 55 50.7  16.0     --

Additional magnitudes for 2006ke in UGC 3365:  Oct. 13.52 UT, [19.0;
20.49, 18.3.  SN 2006ke appears to be a subluminous type-Ia
supernova around maximum light (details on CBET 684).  Additional
magnitudes for 2006kf in UGC 2829:  Sept. 26.53, [18.8; Oct. 23.45,
17.6.  SN 2006kf is a type-Ia supernova before maximum B brightness
(details on CBET 691).  SN 2006ld in UGC 348 is a type-Ib supernova
some 1-2 weeks past maximum (details on CBET 689); nothing was
visible at the location of 2006ld on a NEAT image taken on Sept. 20
(limiting mag approximately 20.0).


COMET C/2006 M4 (SWAN)
     This comet appears to have undergone an outburst, as indicated
by the following visual total-magnitude and coma-diameter estimates:
Oct. 20.75 UT, 5.6, 6' (A. Diepvens, Balen, Belgium, 20x50
binoculars); 20.79, 5.9, 10' (J. J. Gonzalez, Asturias, Spain, 7x50
binoculars); 23.75, 5.9, 7' (R. J. Bouma, Groningen, The Netherlands,
15x80 binoculars); 24.04, 5.4, -- (B. King, Duluth, MN, naked eye);
24.77, 4.0, 7' (Diepvens); 24.77, 4.4, 8' (Bouma, 7x50 binoculars);
24.81, 4.5, 8' (Gonzalez; 1.8-deg tail in p.a. 25 deg; total mag
4.3 via naked eye).

                      (C) Copyright 2006 CBAT
2006 October 25                (8766)            Daniel W. E. Green