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IAUC 6679: 1997cr; N Sco 1997; Z And; C/1997 J2

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IAUC number

                                                 Circular No. 6679
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)
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     The Mount Stromlo Abell Cluster Supernova Search Team (cf.
IAUC 6639) reports the discovery of an apparent supernova (V =
20.4, R = 20.4) on CCD images taken on June 7 by S. Chan at the
Mount Stromlo 1.27-m telescope (+ Macho Camera).  SN 1997cr is
located near Abell 3744 at R.A. = 21h05m48s.21, Decl. =
-25o13'29".8 (equinox 2000.0).  A nearby star has position end
figures 54s.32, 14'47".4.  SN 1997cr was also present on similar
frames taken on June 1 (same magnitudes), but it is not visible on
images taken on 1996 May 22 (limiting mag R = 21).  Finding charts
are available at http://msowww.anu.edu.au/~reiss/Abell_SNSearch/.

     P. Mason, T. E. Harrison, B. J. McNamara, and J. J. Johnson,
New Mexico State University, report that observations of Liller's
suspected nova (IAUC 6675, 6678) obtained with the ARC 3.5-m
telescope confirm that this object is a classical nova.  Optical
spectroscopy reveals broad emission lines of H-alpha (FWHM = 3000
km/s), H-beta, the [Ca II] infrared triplet, and strong [Fe II]
lines from multiplet 42.  The H-beta profile shows evidence for a
weak P-Cyg profile.

     J. A. Mattei, AAVSO, reports that this prototype of symbiotic
stars is undergoing an outburst, as indicated by the following
observations submitted to the AAVSO:  May 8.46 UT, 10.9 (G. Hanson,
II, Cave Creek, AZ); 20.07, 10.6 (G. Poyner, West Midlands,
England); 26.36, 10.1 (R. Modic, Richmond Heights, OH); 29.44, 10.0
(Hanson); 31.093, 9.9 (P. Schmeer, Saarbrucken, Germany); June
4.36, 9.7 (Modic); 6.14, 9.8 (J. Bortle, Stormville, NY); 8.36, 9.7
(Hanson); 9.13, 9.5 (Bortle).  The last outburst was in 1985
September, when Z And brightenen to visual mag 9.1 and was above
minimum for about 290 days.  Following the 1985 outburst, Z And
showed small-amplitude oscillations of about 0.5 mag until the
current outburst.

     Visual m_1 estimates:  May 28.94 UT, 12.0 (A. Pereira, Cabo da
Roca, Portugal, 0.25-m reflector); June 7.93, 12.4 (M. Meyer,
Frauenstein, Germany, 0.25-m refl.); 10.13, 12.4 (J. Bortle,
Stormville, NY, 0.41-m reflector).
     Corrigendum.  On IAUC 6659, last line, for  350 deg  read 170

                      (C) Copyright 1997 CBAT
1997 June 10                   (6679)            Daniel W. E. Green

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