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IAUC 6881: SNe

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                                                 Circular No. 6881
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVAE
     The Supernova Cosmology Project (cf. IAUC 6804), reports the
discovery of 13 supernovae and 7 apparent supernovae, all found
with the Cerro Tololo 4-m telescope in their High Redshift
Supernova Search:

SN       1997 UT       R.A. (2000) Decl.       R      z     type
1998as   Mar. 22   10h53m56.22  - 3 39'10.0   22.0   0.36E   Ia
1998at   Mar. 22   10 54 54.37  - 3 44 10.0   23.8   0.40    II
1998au   Mar. 22   10 55 46.11  - 4 19 51.0   23.5            ?
1998av   Mar. 22   10 56 07.98  - 4 11 20.6   23.3            ?
1998aw   Mar. 22   10 56 15.02  - 4 15 21.5   25.0   0.44*   Ia
1998ax   Mar. 22   10 57 16.38  - 3 33 59.2   22.3   0.50E   Ia
1998ay   Mar. 22   10 57 21.51  - 3 14 49.9   22.9   0.64    Ia
1998az   Mar. 22   10 57 21.78  - 3 25 23.0   22.7   0.46    Ia
1998ba   Mar. 22   13 43 36.92  + 2 19 30.6   22.3   0.43E   Ia
1998bb   Mar. 22   13 43 53.58  + 1 25 33.7   24.0   0.57    Ia
1998bc   Mar. 22   13 45 10.14  + 2 23 52.4   22.1   0.40E   Ia
1998bd   Mar. 22   13 45 29.05  + 1 57 32.5   21.2   0.25E   Ia
1998be   Mar. 22   13 46 20.89  + 2 02 40.4   23.8   0.64    Ia
1998bf   Mar. 22   13 46 31.80  + 2 08 37.7   24.3            ?
1998bg   Mar. 22   13 47 11.74  + 2 07 22.4   20.9            ?
1998bh   Mar. 22   13 47 36.55  + 2 18 22.5   23.1            ?
1998bi   Mar. 22   13 47 44.72  + 2 20 57.2   23.7   0.75    Ia
1998bj   Mar. 22   13 47 49.63  + 1 59 47.8   23.4            ?
1998bk   Mar. 22   13 48 48.25  + 2 58 41.2   22.5   0.41*   Ia
1998bl   Mar. 22   13 49 36.04  + 1 57 46.6   23.2            ?

The supernova spectra were obtained at the Keck II telescope on
Mar. 30-Apr. 1, except for those marked 'E', which were obtained at
the European Southern Observatory 3.6-m telescope on Mar. 28.  The
redshifts were determined from host-galaxy emission and absorption
lines, except for those marked with an asterisk, which were
determined solely from the spectra of the supernovae.  The apparent
supernovae were all followed with Cerro Tololo photometry on at
least three nights.  All supernovae were found to be within 2".5 of
the host-galaxy center.  R- and I-band photometry of the
lightcurves are being obtained from the ground for all supernovae
with determined redshifts.  R-, I-, and J-band photometry for SNe
1998as, 1998aw, 1998ax, 1998ay, 1998ba, 1998bb, 1998be, and 1998bi
are being obtained with the Hubble Space Telescope.

                      (C) Copyright 1998 CBAT
1998 April 22                  (6881)            Daniel W. E. Green

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