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IAUC 6762: 1997di; SNe

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                                                 Circular No. 6762
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVA 1997di IN UGC 4015
     Y. L. Qiu, Q. Y. Qiao, W. D. Li, and J. Y. Hu, Beijing
Astronomical Observatory (BAO); and A. Esamdin, Urumqi Astronomical
Station, on behalf of the BAO supernova survey, report the
discovery of a supernova (mag about 18.1) on an unfiltered CCD
frame taken with the BAO 0.6-m reflector on Oct. 27.9 UT.  SN
1997di is located at R.A. = 7h47m44s.45, Decl. = +62o19'39".2
(equinox 2000.0), which is 29" west and 11" north of the nucleus of
UGC 4015.  The supernova was confirmed on images obtained on Oct.
26, at mag about 18.5.  Unfiltered CCD images of the same field
taken on Oct. 19 (limiting mag about 19.0) show no star at the
position of the supernova.  A low-dispersion spectrum taken on Oct.
29.8 with the 2.16-m telescope at Xinglong station shows this to be
a type-II supernova near maximum.  H-alpha and H-beta display
conspicuous P-Cyg profiles.  Expansion velocities derived from
absorption minimum of H-alpha and H-beta are 6350 and 5600 km/s,
respectively.  The recession velocity of the host galaxy is 5620
km/s, as derived from the narrow H-alpha emission line.
     S. Jha, P. Garnavich, P. Challis, and R. Kirshner, Harvard-
Smithsonian Center for Astrophysics, report that a spectrum of SN
1997di taken by P. Berlind on Oct. 29.5 UT at the Whipple
Observatory 1.5-m telescope reveals that it is a normal type-II
supernova near maximum, showing P-Cyg Balmer lines.  The expansion
velocity measured from the H-alpha profile is 7500 km/s.

     The EROS Team (cf. IAUC 6605, 6628, 6760) reports their
discovery of four apparent supernovae on images obtained with the
1-m Marly telescope at the European Southern Observatory:

SN       1997 UT      R.A. (2000.0) Decl.      V     Offset
1997dj   Oct. 24    1 14 40.97  -40 35 51.1   22     3".6 E, 3".0 S
1997dk   Oct. 26   23 43 38.69  -41 19 25.4   18.7   8".4 W, 7".2 S
1997dl   Oct. 26   23 43 38.48  -41 19 20.0   19.5   10".8 W, 1".8 S
1997dm   Oct. 26    0 30 12.83  -41 06 08.9   20.3   5".7 E, 2".7 S

SNe 1997dk and 1997dl are in the same galaxy.  SN 1997dj is
apparently still rising in brightness.  Previous images of these
galaxies obtained on 1996 Nov. 1 show no stars at the offsets noted
above (limiting mag about 22).  All four supernova candidates were
confirmed on images taken on Oct. 27.

                      (C) Copyright 1997 CBAT
1997 October 30                (6762)            Daniel W. E. Green

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