Central Bureau for Astronomical Telegrams
IAUC 8007: 2002hk; 2002hf, 2002hh; 2002hg
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Circular No. 8007
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 2002hk IN MCG +07-15-6
M. Ganeshalingam and W. Li, University of California at
Berkeley (UCB), report the LOTOSS (cf. IAUC 7906) discovery of an
apparent supernova on unfiltered KAIT images taken on Nov. 2.5 (mag
about 18.2) and 4.5 UT (mag about 17.9). SN 2002hk is located at
R.A. = 7h07m14s.05, Decl. = +44o48'46".2 (equinox 2000.0), which is
11".9 east and 14".0 south of the nucleus of MCG +07-15-6. A KAIT
image taken on Oct. 22.5 showed nothing at this position (limiting
mag about 19.0).
SUPERNOVAE 2002hf AND 2002hh
A. V. Filippenko, R. J. Foley, and B. Swift, University of
California at Berkeley (UCB), report that inspection of CCD spectra
(range 310-1000 nm), obtained on Nov. 2 UT with the Shane 3-m
reflector at Lick Observatory, reveals that SN 2002hf (IAUC 8004)
is of type Ic, within one week past maximum brightness. Similarly,
spectra of SN 2002hh (IAUC 8005) show it to be a very young, highly
reddened type-II supernova; broad, very-low-contrast H-alpha
emission and absorption are visible, but the continuum is nearly
featureless and very red. Strong, narrow (interstellar) Na I D
absorption is present.
SUPERNOVA 2002hg IN NGC 3306
R. Chornock, S. Jha, and A. V. Filippenko, UCB; and B. Barris,
University of Hawaii, report that a spectrum (range 400-1000 nm),
obtained on Nov. 1.6 UT with the Keck II 10-m telescope (+ ESI), of
SN 2002hg (cf. IAUC 8004) shows it to be a type-II supernova after
maximum light, with well-developed P-Cyg lines of the H Balmer
series, Fe II, and Ca II. Adopting the NASA/IPAC Extragalactic
Database recession velocity for NGC 3306 of 2889 km/s yields an
expansion velocity for the supernova of 4900 km/s, measured from
the trough of the H-beta profile.
G. Pignata and F. Patat, European Southern Obsrvatory; and M.
Turatto, Istituto Nazionale di Astrofisica, Padua, on behalf of the
European RTN (cf. IAUC 7961, 7987), report that preliminary
reduction of a spectrum (range 350-880 nm; resolution 1.1 nm) of SN
2002hg, obtained at Calar Alto on Nov. 2.22 UT with the 2.2-m
reflector (+ CAFOS), shows that this object is a typical type-II
supernova a few weeks after maximum light, with strong Balmer lines
of H, Fe II, Ca II, and Na I with well-developed P-Cyg profiles.
The expansion velocity of the photosphere, deduced from the H-alpha
absorption minimum, is 6800 km/s.
(C) Copyright 2002 CBAT
2002 November 4 (8007) Daniel W. E. Green
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