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IAUC 8037: 2002jz; 2002jy

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                                                  Circular No. 8037
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
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SUPERNOVA 2002jz IN UGC 2984
     T. Puckett, Mountain Town, GA; and D. Tigner, Kanata, ON,
report the discovery of an apparent supernova (mag 15.9) on an
unfiltered CCD frame (limiting mag 18.8) taken with the Puckett
Observatory 0.35-m automated supernova patrol telescope on Dec.
23.27 UT.  The new object is located at R.A. = 4h13m12s.52, Decl. =
+13o25'07".3 (equinox 2000.0), which is 1".9 west and 4".2 south of
the center of UGC 2984.  SN 2002jz was confirmed on unfiltered CCD
frames taken by A. Sehgal, Woodinville, WA, on Dec. 24.27, but it
does not appear on unfiltered images taken by Puckett on 2001 Feb.
26, Sept. 22, and Dec. 5 (limiting mag about 19.5), or on Palomar
Sky Survey images taken on 1990 Jan. 24, 1989 Nov. 5 (limiting mag
about 21.0), and 1953 Oct. 10 (limiting mag about 20.0).
     M. Hamuy, Carnegie Observatories, reports spectroscopic
observations (range 380-725 nm) of SN 2002jz made by M. Roth and N.
Morrell on Dec. 27.22 UT with the Las Campanas Observatory Dupont
2.5-m telescope (+ Modular Spectrograph).  The spectrum bears some
resemblance to that of the type-Ic SN 1994I taken 10 days past
maximum (Filippenko et al. 1995, Ap.J. 450, L11).  Both supernovae
show a strong Na I D 589.2-nm line exhibiting a P-Cyg profile and
prominent blends of Fe II lines between 400 and 470 nm.  However,
SN 2002jz shows an evident absorption (possibly H-alpha) at 644 nm
(rest wavelength) that is not present in SN 1994I, suggesting
perhaps an intermediate IIb-type supernova.  Na I D interstellar
lines at the redshift of the host galaxy can be seen with an
equivalent width of 0.1 nm, which suggests significant reddening by

     T. Matheson, P. Challis, and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 370-750 nm)
of SN 2002jy (cf. IAUC 8035), obtained by M. Calkins on Dec. 26.11
UT with the F. L. Whipple Observatory 1.5-m telescope (+ FAST
spectrograph), shows it to be a type-Ia supernova near maximum.
Adopting the NASA/IPAC Extragalactic Database recession velocity of
5876 km/s for the host galaxy, the supernova expansion velocity is
about 11000 km/s for Si II (rest 635.5 nm).  The spectral-feature
age of the supernova (Riess et al. 1997, A.J. 114, 722) is 1 +/- 2
days before maximum light.

                      (C) Copyright 2002 CBAT
2002 December 27               (8037)            Daniel W. E. Green

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