IAU Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 8628: 2005io, 2005ip, 2005iq

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 8627  SEARCH Read IAUC 8629

View IAUC 8628 in .dvi, .ps or .PDF format.
IAUC number


                                                  Circular No. 8628
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 2005io, 2005ip, 2005iq
     Three apparent supernovae have been reported from unfiltered
CCD images:  2005io independently by E. Lee and W. Li (via
LOSS/KAIT; cf. IAUC 8625; the tabulated data below for 2005io are
from KAIT) and by T. Boles (Coddenham, England, 0.35-m reflector);
2005ip by Boles; and 2005iq by H. Khandrika and W. Li (LOSS/KAIT).
Additional magnitudes for 2005io for SN 2005io in UGC 3361:  1989
Dec. 3, [21.0 (Digitized Sky Survey red plate; via Boles); 1992
Nov. 24, [21.5 (DSS, blue); 2005 Mar. 14 UT, [19.5 (Boles); Oct.
10, [19.5 (Boles); 28.46, [19.5 (KAIT); Nov. 4.007, 18.6 (Boles;
position end figures 24s.62, 06".4).  Additional magnitudes for
2005ip in NGC 2906:  1994 Feb. 9, [20.5 (DSS, blue, via Boles);
1999 Feb. 20, [21.0 (DSS, red); 2004 Dec. 6 and 2005 Jan. 21,
[19.5 (Boles); Nov. 5.261, 14.6 (C. Colesanti, C. Jacques, E.
Pimentel, and T. Napoleao, Belo Horizonte, Brazil); 5.682, 14.8 (K.
Itagaki, Yamagata, Japan; via S. Nakano, Sumoto; position end
figures 06s.40, 44".2).  Additional KAIT magnitudes for 2005iq in
MCG -03-1-8:  Oct. 9.22, [19.0; Nov. 6.21, 17.0.

SN      2005 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2005io  Nov. 3.47    5 50 24.64  +49 43 06.5  18.5  6".1 W, 17".6 N
2005ip  Nov. 5.163   9 32 06.42  + 8 26 44.4  15.5  2".8 E, 14".2 N
2005iq  Nov. 5.20   23 58 32.50  -18 42 33.0  17.2  8".6 E, 17".7 N

     A. V. Filippenko and R. J. Foley, University of California,
Berkeley, report that inspection of CCD spectra (range 330-920 nm),
obtained on Nov. 5 UT with the Keck I 10-m telescope (+ LRIS),
shows that SN 2005io is of type II, shortly after the explosion.
The broad hydrogen Balmer lines exhibit P-Cyg profiles, but in the
case of H_alpha the emission component greatly dominates over the
absorption component.  The continuum is very blue, and He I 587-nm
absorption is present.
     M. Modjaz, R. Kirshner, and P. Challis, Harvard-Smithsonian
Center for Astrophysics, report that a spectrogram (range 350-740
nm) of 2005ip, obtained by M. Calkins on Nov. 6.50 UT with the Mt.
Hopkins 1.5-m telescope (+ FAST), shows it to be a type-II
supernova, probably within a few weeks past explosion.  The
spectrum consists of a blue continuum (indicating a young age), the
P-Cyg line of H_alpha, and other absorption troughs.  Adopting a
recession velocity of 2440 km/s for the host galaxy (from Falco et
al. 1999, PASP 111, 438), the expansion velocity derived from the
minimum of the H_alpha line is 15400 km/s.  An absorption trough
observed at about 425.0 nm seems to be too blue to be identified
with H_beta.

                      (C) Copyright 2005 CBAT
2005 November 6                (8628)            Daniel W. E. Green

Read IAUC 8627  SEARCH Read IAUC 8629

View IAUC 8628 in .dvi, .ps or .PDF format.


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


Valid HTML 4.01!