Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 8766: 2006jf-2006ld; C/2006 M4

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).

Read IAUC 8765 SEARCH Read IAUC 8767

View IAUC 8766 in .dvi, .ps or .PDF format.
IAUC number 

                                                  Circular No. 8766
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


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

Read IAUC 8765 SEARCH Read IAUC 8767

View IAUC 8766 in .dvi, .ps or .PDF format.

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!