Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 8273: 2004K; 2004G; 2004H; C/2001 Q4

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 8272 SEARCH Read IAUC 8274

View IAUC 8273 in .dvi, .ps or .PDF format.
IAUC number 

                                                  Circular No. 8273
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)


SUPERNOVA 2004K IN ESO 579-G22
     Further to IAUC 8272, J. Graham and W. Li report the LOSS
discovery, on KAIT images taken on Jan. 19.6 (mag about 17.2) and
21.5 UT (mag about 17.1), of an apparent supernova located at R.A.
= 14h23m39s.85, Decl. = -19o26'50".0 (equinox 2000.0), which is
15".5 west and 11".8 south of the nucleus of ESO 579-G22.  A KAIT
image taken on 2003 July 1.2 showed nothing at this position
(limiting mag about 19.0).


SUPERNOVA 2004G IN NGC 5668
     N. Elias-Rosa, Osservatorio Astronomico di Padova (OAP); G.
Pignata, European Southern Observatory (ESO); S. Benetti, G. Blanc,
A. Della Valle, A. Pastorello, G. Altavilla, H. Navasardyan, M.
Turatto, and L. Zampieri, OAP; E. Cappellaro, Osservatorio
Astronomico di Capodimonte; and F. Patat, ESO, on behalf of the
ERTN (IAUC 7987), report, from inspection of spectra obtained on
Jan. 21.15 UT with the Calar Alto 2.2-m reflector (+ CAFOS; range
380-880 nm; resolution 1.1 nm), and Jan. 21.18 with the Asiago
1.8-m telescope (+ AFOSC; range = 355-780 nm, resolution 2.4 nm),
that SN 2004G (IAUC 8272) is a type-II supernova, about 5 months
after explosion.  The expansion velocities deduced from the H_alpha
and H_beta absorptions are about 6600 and 4300 km/s, respectively.


SUPERNOVA 2004H IN IC 708
     C. L. Gerardy and G. H. Marion, University of Texas at Austin,
report that a low-resolution optical spectrogram (resolution 600;
range 430-700 nm) of SN 2004H (cf. IAUC 8272), obtained on Jan.
22.35 UT with the 2.7-m Harlan J. Smith Telescope (+ LCS
spectrograph) at McDonald Observatory, shows it to be a type-Ia
supernova near maximum light; adopting the 9497 km/s redshift of IC
708 from the NASA/IPAC Extragalactic Database, the expansion
velocity of the Si II feature (rest wavelength 635.5 nm) is 10600
km/s.  The 580-nm Si II absorption feature appears unusually strong
relative to the 615-nm feature, indicating that SN 2004H is likely
a subluminous type-Ia object.


COMET C/2001 Q4 (NEAT)
     Total visual magnitude estimates:  2003 Dec. 22.09 UT, 9.8 (A.
Amorim, Florianopolis, Brazil, 0.14-m refl.); 2004 Jan. 10.46, 9.0
(D. A. J. Seargent, The Entrance, N.S.W., 10x50 binoculars); 14.02,
9.0 (Amorim).

                      (C) Copyright 2004 CBAT
2004 January 22                (8273)            Daniel W. E. Green

Read IAUC 8272 SEARCH Read IAUC 8274

View IAUC 8273 in .dvi, .ps or .PDF format.

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

Valid HTML 4.01!