Central Bureau for Astronomical Telegrams
IAUC 7743: 2001ff; N SMC 2001; 2001fc
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 7744
.dvi or
.ps format.
Circular No. 7743
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 2001ff IN UGC 4685
W. D. Li, University of California at Berkeley, reports the
discovery by LOTOSS (cf. IAUC} 7514) of an apparent supernova (mag
about 17.1) in unfiltered KAIT images taken on Nov. 2.5 and 3.5 UT.
SN 2001ff is located at R.A. = 8h57m00s.97, Decl. = +13o11'59".5
(equinox 2000.0), which is 1".5 west and 2".6 north of the nucleus
of UGC 4685. A KAIT image taken on Apr. 17.2 showed nothing at
this position (limiting mag about 19.0).
NOVA IN THE SMALL MAGELLANIC CLOUD 2001
M. Della Valle, Arcetri Astrophysical Observatory, Florence;
I. Saviane, European Southern Observatory; and R. Williams, Space
Telescope Science Institute, report that preliminary analysis of a
spectrum (range 390-850 nm), obtained on Oct. 30.25 UT at La Silla
with the 1.5-m telescope (+ Boller & Chivens spectrograph), shows
that the suspected nova reported on IAUC 7738 is indeed a nova
caught during its early decline. The spectrum is dominated by
emission lines of the Balmer series, flanked by P-Cyg profiles.
Also prominent are emission lines due to Na I, Fe II, and O I. The
FWZI measured for H-alpha yields about 5500 km/s.
E. L. N. Jensen, Swarthmore College; P. Allen, University of
Pennsylvania; G. J. Schwarz, University of Arizona; and K. M.
Vanlandingham, Biosphere 2 Center, report on optical spectra (range
480-800 nm, resolution 0.014 nm) taken of the nova on Nov. 2.12 UT
with the Cerro Tololo 4-m reflector (+ echelle spectrograph). The
spectrum is dominated by strong emission lines of H-alpha, H-beta,
and O I (777.1 nm). The Balmer lines have average FWHM = 1400 km/s
and FWZI = 2200 km/s. Weak lines of C II (723.4 nm), [O I] (630,
636.3, and 557.7 nm), and Fe II (multiplets 42, 74) are also seen.
The lines all show a double-peaked structure. The spectrum is very
similar to that of N LMC 1988 No. 1, approximately 2 weeks after
outburst.
SUPERNOVA 2001fc IN UGC 11683
M. Ganeshalingam and W. D. Li, University of California at
Berkeley, report the independent discovery of SN 2001fc (at mag
about 18.7) by LOTOSS on an unfiltered KAIT image taken on Oct.
27.1 UT. They measured the position end figures for SN 2001fc (cf.
IAUC 7741) to be 26s.66, 15".6. A KAIT image taken on Oct. 13.1
showed nothing at this position (limiting mag about 19.0).
(C) Copyright 2001 CBAT
2001 November 2 (7743) Daniel W. E. Green
Read IAUC 7744
.dvi or
.ps format.
Our Web policy. Index to the CBAT/MPC/ICQ pages.
