Central Bureau for Astronomical Telegrams
IAUC 7351: 2000E; 2000B; V723 Cas
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 7352
.dvi or
.ps format.
Circular No. 7351
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)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)
SUPERNOVA 2000E IN NGC 6951
G. Valentini, E. Di Carlo, D. Guidubaldi, and E. Brocato,
Teramo Observatory; and A. Di Paola, F. D'Alessio, R. Speziali, G.
Li Causi, and F. Pedichini, Rome Observatory, report their
discovery of a new supernova on CCD images obtained with the Teramo
0.72-m TNT telescope on Jan. 26.73 UT. SN 2000E is located at R.A.
= 20h37m13s.8, Decl. = +66o05'50".2 (equinox 2000.0), which is 6".3
west and 26".7 south of the center of NGC 6951, and 28" west and
24" south of SN 1999el (cf. IAUC 7288). Preliminary photometry of
SN 2000E (near-infrared photometry obtained at the 1.1-m AZT-24
telescope at Campo Imperatore): Jan. 26.73, V = 14.30 +/- 0.07;
26.78, J = 13.8 +/- 0.1, H = 15.1 +/- 0.1; 26.79, B = 15.78 +/-
0.06. CCD frames taken on 1999 Dec. 18.78 show nothing at the
location of 2000E, and the Digital Sky Survey does not show
anything at that location. No object was detected in near-infrared
images (J, H) obtained on Jan. 6.74.
M. Turatto, G. Galletta, and E. Cappellaro, Padova, report
that preliminary inspection of a spectrogram (range 400-730 nm,
resolution 1.4 nm) of SN 2000E, obtained with the 1.8-m telescope
at Cima Ekar (+ Afosc) on Jan. 27.83 UT, shows a continuum with
strong lines of Si II, S II, Si III, Fe III, and Ca II, indicating
that SN 2000E is indeed a type-Ia event, a few days before maximum
light. The expansion velocity deduced from the Si II lines is
about 11~000 km/s. Narrow absorption features of Na I D are
present, indicating that the light from the supernova suffered
consistent reddening both from the Milky Way and the parent galaxy.
SUPERNOVA 2000B IN NGC 2320
F. Colas, A. Fienga, and C. Buil, Pic du Midi Observatory,
report that a CCD spectrum (range 450-650 nm), obtained on Jan.
22.8 UT with the Pic du Midi 1-m telescope, shows that SN 2000B
(cf. IAUC 7347) is of type Ia, near maximum brightness.
V723 CASSIOPEIAE
D. Chochol and T. Pribulla, Skalnate Pleso Observatory; O.
Shemmer, Wise Observatory, Tel Aviv University; A. Retter, Keele
University; and S. Y. Shugarov, V. P. Goranskij, and N. A.
Katysheva, Sternberg Astronomical Institute, Moscow, report:
"Extensive BVR photometry of V723 Cas (N Cas 1995) during Dec. 1996
to Dec. 1999 reveals the nova's binary period to be 0.69325(18)
day. The full amplitude of the variations in the R band increased
from 0.13 mag in 1998 to 0.35 mag in 1999."
(C) Copyright 2000 CBAT
2000 January 27 (7351) Daniel W. E. Green
Read IAUC 7352
.dvi or
.ps format.
Our Web policy. Index to the CBAT/MPC/ICQ pages.
