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IAUC 6820: 1998O, 1998P, 1998Q; 1997ef; 103P

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                                                 Circular No. 6820
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
Phone 617-495-7244/7440/7444 (for emergency use only)

SUPERNOVAE 1998O, 1998P, 1998Q
     L. Germany reports that the Mount Stromlo Abell Cluster
Supernova Search Team (cf. IAUC 6639) has discovered three apparent
supernovae on V and R CCD images (limiting mag V = 21.5) taken by
R. Hola at the Mount Stromlo 1.27-m telescope (+ Macho Camera):

SN       Date UT      R.A. (2000.0) Decl.      V         Offset
1998O    Jan. 27   13 39 34.98  -35 46 32.5   20.9   1".1 E, 16".4 N
1998P    Jan. 27   13 37 17.63  -35 27 32.6   20.1   2".3 E, 2".5 N
1998Q    Jan. 27   13 32 46.38  -31 37 23.5   18.5   0".1 E, 1".5 N

SNe 1998O, 1998P, and 1998Q are located in anonymous galaxies near
the Abell galaxy clusters A3566, A3566, and A3562, respectively.
Confirmation images (limiting mag V = 21.5) for SN 1998Q were
obtained by S. Sabine with the same telescope on Jan. 31 and for
the supernovae in A3566 on Feb. 4.  None of the supernovae were
present on images taken on 1997 July 17 (limiting mag V = 20).
Finding charts are available at

SUPERNOVA 1997ef IN UGC 4107
     L. Wang, D. A. Howell, and J. C. Wheeler, University of Texas
at Austin, report:  "SN 1997ef was observed on 1997 Dec. 28 and
1998 Feb. 2 UT with the 2.1-m telescope at McDonald Observatory.
The 1998 Feb. data show that SN 1997ef is making the transition to
the nebular phase, and the spectrum strongly resembles those of
type-Ic supernovae at 1-2 months past maximum (similar to the type-
Ic spectrum of SN 1997ei taken on the same night).  Broad emission
lines of He I (587.6 nm)/Na I (589.0, 589.6 nm), [O I] (630.0,
636.4 nm), O I (777.1 nm), and Mg I] (457.1 nm) were detected.
Spectropolarimetry was also obtained, but no polarization was
detected down to about 1.5 percent."

     Total visual magnitude estimates:  Jan. 17.73 UT, 8.4 (M.
Meyer, Frauenstein, Germany, 20x100 binoculars); 21.12, 8.0 (C. E.
Spratt, Victoria, BC, 0.08-m refractor); 25.74, 8.7 (M. Reszelski,
Szamotuly, Poland, 20x60 binoculars); 27.81, 8.6 (A. Pereira, Cabo
da Roca, Portugal, 14x100 binoculars); 31.99, 8.8 (J. Bortle,
Stormville, NY, 20x80 binoculars); Feb. 3.08, 9.8 (G. W. Kronk,
Troy, IL, 0.33-m reflector; moonlight).

                      (C) Copyright 1998 CBAT
1998 February 5                (6820)            Daniel W. E. Green

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