Central Bureau for Astronomical Telegrams
IAUC 7652: THE EDGAR WILSON AWARD; 2001cx; 2001cp
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 7653
.dvi or
.ps format.
Circular No. 7652
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)
THE EDGAR WILSON AWARD
With reference to IAUC 6936 (and also to IAUC 7223 and 7445),
the Smithsonian Astrophysical Observatory wishes to announce that
the 2001 Edgar Wilson Award for the discovery of comets is being
divided among the following two amateur astronomers for C/2000 W1:
Albert Francis Arthur Lofley Jones, Stoke, Nelson, New Zealand; and
Syogo Utsunomiya, Minami-Oguni machi, Aso-gun, Kumamoto-ken, Japan.
SUPERNOVA 2001cx IN UGC 12266
T. Matheson, S. Jha, P. Challis, and R. Kirshner, Harvard-
Smithsonian Center for Astrophysics, report that a spectrum of SN
2001cx (cf. IAUC 7651), obtained by M. Calkins on June 28.44 UT
with the F. L. Whipple Observatory 1.5-m telescope (+ FAST
spectrograph), shows it to be a type-II supernova past maximum
light. The spectrum exhibits a flat continuum with well-defined
P-Cyg lines of hydrogen, consistent with the plateau phase of a
normal type-II supernova. Adopting the NASA/IPAC Extragalactic
Database recession velocity of 4817 km/s for the host galaxy, the
expansion velocity derived from the minimum of the H-beta line is
about 4800 km/s.
SUPERNOVA 2001cp IN UGC 10738
M. Dennefeld, Institut d'Astrophysique de Paris, writes: "A
calibrated low-dispersion spectrum (range 370-733 nm; resolution
0.6 nm) of SN 2001cp (cf. IAUC 7645, 7649) was obtained with the
1.93-m telescope at Haute-Provence Observatory on June 21.97 UT.
The spectrum shows a blue continuum, with strong Ca II/Si II
absorption and emission features in the blue --- along with a
marked, but comparatively more shallow, Si II 635-nm absorption,
indicating a type-Ia supernova reaching maximum. The spectrum in
fact closely resembles that of SN 1990N a week before maximum.
With a recession velocity of the parent galaxy of 6719 km/s taken
from the Lyon Extragalactic Database, the Si II 635-nm absorption
yields an expansion velocity of 11 000 km/s, while the blue Ca II
lines give 13 000-16 000 km/s. Another spectrograph obtained on
June 24.98 shows no significant spectral change since June 21, with
the exception of a flattening of the continuum slope."
G. Masi, Ceccano, Italy, reports an unfiltered magnitude of
16.1 from a CCD image obtained on June 22.937 UT. He also provides
the following accurate position for SN 2001cp: R.A. = 17h11m02s.65,
Decl. = +5 50'27".8 (equinox 2000.0; eight USNO-A2.0 reference
stars).
(C) Copyright 2001 CBAT
2001 June 29 (7652) Daniel W. E. Green
Read IAUC 7653
.dvi or
.ps format.
Our Web policy. Index to the CBAT/MPC/ICQ pages.
