Central Bureau for Astronomical Telegrams
IAUC 7391: SNe; 1998bu
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 7392
.dvi or
.ps format.
Circular No. 7391
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)
SUPERNOVAE
Further to IAUC 7391, B. E. Schaefer reports eleven additional
apparent supernovae. SN 2000ba has no apparent host galaxy, to R
about 21.5.
SN 2000 UT R.A. (2000.0) Decl. R Offset
2000av Mar. 10 7 38 28.85 - 1 44 16.0 20.1 0" E, 1" S
2000aw Mar. 10 8 01 34.00 - 1 57 14.3 19.4 0" E, 0" N
2000ax Mar. 10 8 44 16.35 - 0 43 02.7 20.6 0" E, 1" S
2000ay Mar. 10 9 05 44.86 - 1 39 52.8 19.8 0" E, 1" N
2000az Mar. 10 9 18 02.15 - 2 16 58.9 19.8 0" E, 1" N
2000ba Mar. 9 10 16 02.05 - 1 53 39.9 19.9 ---
2000bb Mar. 1 10 32 38.83 - 2 00 24.2 20.2 1" E, 0" N
2000bc Mar. 9 10 33 06.30 - 1 00 21.2 18.9 3" E, 2" S
2000bd Mar. 10 13 07 20.81 - 1 05 08.1 20.5 1" W, 1" S
2000be Mar. 9 15 12 03.38 - 0 00 04.1 20.1 0" E, 0" N
2000bf Mar. 9 15 12 18.37 - 1 39 17.5 20.7 0" E, 0" N
SUPERNOVA 1998bu IN NGC 3368
E. Cappellaro, S. Benetti, A. Pastorello, M. Turatto, G.
Altavilla, and L. Rizzi, Padova Observatory, write: "We observed
SN 1998bu (IAUC 6899, 6905; Jha et al. 1999, Ap.J. Suppl. 125, 73,
and references therein) on Feb. 15 with the Danish 1.5-m telescope
(+ DFOSC) and on Mar. 2 with the European Southern Observatory
3.6-m telescope (+ EFOSC2) at La Silla. For the first date,
corresponding to 637 days after maximum, we measured B = 21.07 and
V = 21.16. This indicates that the decline had slowed, the new
points being about 3 mag brighter than the extrapolated exponential
tail. The spectrum taken on Mar. 2 (day 653) show a blue energy
distribution with broad absorption and emission features. The
highest intensity peaks are centered at 355, 394, 408, and 460 nm.
Both light curve and spectrum show an impressive similarity to SN
1991T at the same phase. Since the late pecularities of SN 1991T
were convincingly interpreted as due to reprocessing of the
luminosity at maximum by foreground dust (Schmidt et al. 1994,
Ap.J. 434, L19), the same interpretation may apply also to this
case. It may not be a coincidence that the early luminosity
decline rates of the two supernovae were also very similar."
(C) Copyright 2000 CBAT
2000 March 31 (7391) Daniel W. E. Green
Read IAUC 7392
.dvi or
.ps format.
Our Web policy. Index to the CBAT/MPC/ICQ pages.
