Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 8406: 2004el, 2004em, 2004en, 2004eo, 2004ep

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 8405 SEARCH Read IAUC 8407

View IAUC 8406 in .dvi or .ps format.
IAUC number 

                                                  Circular No. 8406
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 2004el, 2004em, 2004en, 2004eo, 2004ep
     Five apparent supernovae have been discovered on unfiltered
CCD images:  2004el in MCG +09-25-4 by R. Arbour (cf. IAUC 8376),
2004em in IC 1303 by M. Armstrong (cf. IAUC 8399), 2004en by T.
Boles (cf. IAUC 8405), 2004eo in NGC 6928 by K. Itagaki (cf. IAUC
8377; via S. Nakano), and 2004ep in IC 2152 by M. Moore and W. Li
(LOSS/KAIT; cf. IAUC 8401).

SN       2004 UT        R.A.  (2000.0)  Decl.    Mag.     Offset
2004el   Sept.14.870  14 59 51.79  +54 37 06.1   16.8   9".9 W, 2".7 S
2004em   Sept.14.968  19 31 31.11  +35 52 15.7   17.5   10".4 E, 20".3 S
2004en   Sept.16.054   2 36 26.53  +35 59 25.5   18.2   8".9 E, 1".0 N
2004eo   Sept.17.500  20 32 54.19  + 9 55 42.7   17.8   59".1 E, 6".5 N
2004ep   Sept.22.52    5 57 53.66  -23 10 58.3   18.6   3".8 E, 7".2 S

Approximate unfiltered CCD magnitudes (from the respective
discoverers unless otherwise noted):  SN 2004el, Mar. 30 UT, [19.5
(Boles); 6.92, [17.5; Sept. 14.943, 17.2 (Boles); 15.822, 16.8.
SN 2004em, 1988 June 13, [22.5 (blue Palomar Sky Survey); 1992 Aug.
31, [20.8 (red Palomar Sky Survey); 2004 July 28, [19.0; Sept.
15.831, 17.5.  SN 2004en, 1986 Nov. 27, [21.0 (red Digitized Sky
Survey); 1987 Oct. 1, [20.5 (blue Digitized Sky Survey); 2003 Nov.
27, [19.5; Dec. 28, [19.5; 2004 Sept. 16.966, 18.2.  SN 2004eo,
2002 July 30, [18.5; 2004 Sept. 8, [18.5; 12, [18.5; 18.647, 17.6
(poor weather conditions).  SN 2004ep, Mar. 5.20, [19.5; Aug.
16.54, 18.7.  An image of SN 2004el taken by D. Briggs (near
Portsmouth, England) on Sept. 14.9 yielded position end figures
51s.84, 05".7.  SN 2004el was also not present on the (Digitized
Sky Survey) Palomar plates taken in 1991 (limiting blue mag 20.1)
and 1994 (limiting red mag 19.8).
     M. Modjaz, P. Challis and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics; and T. Matheson, National Optical
Astronomy Observatory, report that a spectrum (range 350-740 nm) of
SN 2004el, obtained by P. Berlind on Sept. 17.12 UT with the F. L.
Whipple Observatory 1.5-m telescope (+ FAST), reveals it to be a
supernova of type II.  The spectrum consists of a blue continuum
with P-Cyg lines of H_alpha and H_beta.  Adopting the Lyon-Meudon
Extragalactic Database recession velocity of 7885 km/s for the host
galaxy, the expansion velocity derived from the minimum of the
H_beta line is 9900 km/s.

                      (C) Copyright 2004 CBAT
2004 September 23              (8406)            Daniel W. E. Green

Read IAUC 8405 SEARCH Read IAUC 8407

View IAUC 8406 in .dvi or .ps format.

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

Valid HTML 4.01!