Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 8674: 2006ae, 2006af, 2006ag, 2006ah, 2006ai; GRB 060218 = 2006aj

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 8673 SEARCH Read IAUC 8675

View IAUC 8674 in .dvi, .ps or .PDF format.
IAUC number 

                                                  Circular No. 8674
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 2006ae, 2006af, 2006ag, 2006ah, 2006ai
     Several apparent supernovae have been discovered on CCD images
(all unfiltered except for the spectroscopic SDSS discoveries):
2006ae and 2006af by M. SubbaRao and the Sloan Digital Sky Survey
(SDSS) collaboration (cf. IAUC 8668, CBET 400; magnitudes below are
estimated r-band values; both objects at center of their host
galaxies); 2006ag and 2006ah on Palomar NEAT survey images via the
"Nearby Supernova Factory" collaboration (details on CBET 402); and
2006ai by P. Luckas, O. Trondal, and M. Schwartz (cf. IAUC 8668).
SNe 2006ae, 2006af, and 2006ah all appear to be type-Ia supernovae
within a weak of maximum light upon discovery, while 2006ag is a
type-IIn event.  Additional approximate magnitudes of 2006ai in ESO
5-G9:  2005 Dec. 16.79 UT, [18.5; 2006 Feb. 19.52, 16.0.

SN      2006 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2006ae  Feb.  2.51  14 48 23.27  +21 47 51.5  20.7      -
2006af  Feb.  4.38  10 33 57.18  +20 20 25.7  19.5      -
2006ag  Feb.  9.4   12 00 17.12  +28 36 22.0  17.9      -
2006ah  Feb.  9.6   13 46 13.71  - 9 07 50.6  18.6      -
2006ai  Feb. 17.54   7 29 52.16  -84 02 20.5  16.2  2".5 W, 1".8 S


GRB 060218 = SUPERNOVA 2006aj
     A. Soderberg, California Institute of Technology; E. Berger,
Observatories of the Carnegie Institution of Washington; and B.
Schmidt, Australian National University, report that a spectrogram
(range 320-1000 nm) of GRB 060218 (cf. Cusumano et al., GCN
Observation Report Circ. 4775; R.A. = 3h21m37s, Decl. = +16o51'58",
equinox 2000.0), obtained with Gemini-South telescope (+ GMOS) on
Feb. 21.024 UT, shows that underlying a power-law continuum are
features consistent with a broad-lined type-Ib/c supernova
(designated 2006aj) near maximum light, confirming the findings of
Masetti et al. (GCN 4803).  The Gemini-South spectrum also confirms,
from several narrow emission lines, the redshift of z = 0.033
(Mirabal, who reported r = 17.6 on Feb. 19.1438 via GCN 4784, and
who notes a pre-outburst extended object at the GRB location via
GCN 4783).  Marshall et al. provide a precise position of the
optical counterpart of GRB 060218 from images obtained with the
Swift UltraViolet and Optical Telescope:  R.A. = 3h21m39s.71, Decl.
= +16o52'02".6 (estimated 1-sigma error about 1".0; cf. GCN 4779).
Zheng et al. report (on GCN 4802) the following R magnitudes for
the optical counterpart of GRB 060218:  Feb. 18.4522, 17.8; 20.4471,
18.2.

                      (C) Copyright 2006 CBAT
2006 February 21               (8674)            Daniel W. E. Green

Read IAUC 8673 SEARCH Read IAUC 8675

View IAUC 8674 in .dvi, .ps or .PDF format.

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

Valid HTML 4.01!