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IAUC 7310: 1999ex; 1999ey

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                                                  Circular No. 7310
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 1999ex IN IC 5179
     R. Martin, A. Williams, and S. Woodings, Perth Observatory,
report the discovery of a second supernova in IC 5179 (cf. IAUC
7272, SN 1999ee), found in an image taken on Nov. 9.51 UT in the
course of the PARG Automated Supernova Search.  Images obtained on
Nov. 10.52 and 14 show that the object is slowly brightening.  SN
1999ex is not visible in a deep exposure taken on Oct. 25.58
(estimated limiting mag 19).  Position for SN 1999ex from three
unfiltered CCD images on Nov. 10.53 with the Perth 0.25-m Mike
Candy Telescope by J. Biggs and A. Verveer:  R.A. = 22h16m07s.27
+/- 0s.02, Decl. = -36o50'53".7 +/- 0".3 (equinox 2000; mag about
18.5 +/- 1.0).
     M. Hamuy, University of Arizona; and M. M. Phillips, Carnegie
Observatories, report that a spectrum (range 350-1000 nm,
resolution 0.3 nm) of SN 1999ex, taken on Nov. 14.13 UT with the
New Technology Telescope at the European Southern Observatory
(ESO), shows close resemblance to that of the type-Ic SN 1994I
taken on 1994 Apr. 12 (3 days after V maximum; Filippenko et al.
1995, Ap.J. 450, L11).  UBV images taken with the Cerro Tololo
0.91-m telescope by L. Gonzalez, E. Rubenstein, P. Candia, and L.
Strolger between Nov. 6 and 14 confirm the presence of SN 1999ex
and reveal that maximum light occurred in all three bands on Nov.
13 at B = 17.3 and V = 16.6 (+/-0.1).

     S. Benetti, Telescopio Nazionale Galileo, on behalf of the
STRESS team (E. Cappellaro, A. Pastorello, M. Prevedello, M. Salvo,
and M. Turatto, Padova; J. Danziger, P. Mazzali and L. Rizzi,
Trieste; and F. Patat, ESO), reports the discovery on a CCD frame
taken on Nov. 10.17 UT of a supernova during a search performed
with the ESO/MPI 2.2-m telescope (+ Wide Field Imager).  SN 1999ey
is located 0".5 west and 1".1 south of the nucleus of a faint
galaxy, the latter being located at R.A. = 0h58m03s.39, Decl. =
-27o40'32".3 (equinox 2000.0).  The new object was not present on
Sept. 13 down to a limiting mag V = 23.5.  SN 1999ey was confirmed
with the ESO 3.6-m telescope (+ EFOSC2) on Nov. 14.20 at V about
20.3, and a spectrum (range 350-1000 nm, resolution 2 nm) shows the
features of a type-IIn supernova with strong H I Balmer emissions
superimposed on a relatively blue continuum.  H-alpha shows a
composite profile, consisting of a narrow, barely resolved
component (FWHM about 600 km/s) on top of a broader one (FWHM about
3350 km/s).  The redshift, as measured from the narrow H-alpha
emission of the supernova, is z about 0.093.

                      (C) Copyright 1999 CBAT
1999 November 16               (7310)            Daniel W. E. Green

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