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IAUC 6558: 1997Z; V1333 Aql; 46P

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                                                 Circular No. 6558
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/cfa/ps/cbat.html
Phone 617-495-7244/7440/7444 (for emergency use only)

     R. Martin, A. Williams, and S. Woodings, Perth Observatory,
report the discovery of a supernova (mag R about 15.5) from a CCD
frame taken on Feb. 10.64 UT.  SN 1997Z is located 58" east and 10"
south of the center of NGC 3261 (R.A. = 10h29m.0, Decl. = -44o39',
equinox 2000.0).
     S. Benetti and M. Turatto, European Southern Observatory
(ESO); and E. Cappellaro, Osservatorio di Padova, communicate:
"Inspection of a reduced CCD spectrogram (range 380-800 nm,
resolution 1.1 nm) obtained on Feb. 12.12 UT with the ESO/MPI 2.2-m
telescope (+ EFOSC2) confirms SN 1997Z as a type-II supernova,
about 100 days after explosion.  In the spectrum, several lines
with typical P-Cyg profiles are superimposed on a relatively red
continuum.  Most of the lines arise from H I, Na I, Fe II, and Sc
II.  The expansion velocities (in km/s) deduced from the minima of
the strongest lines are 7200 (H-alpha), 6150 (Na I); 4800 (H-beta),
and 3550 (Fe II).  With the same instrument, we obtained the
following magnitudes for the new object: B = 19.0, B-V = +1.4, and
V-R = +1.3.  The offsets from the galaxy nucleus are 55".1 east and
8".7 south."

     A. M. Levine, Massachusetts Institute of Technology (MIT), and
B. Thomas, Goddard Space Flight Center (GSFC), on behalf on the
RXTE ASM team at GSFC and MIT; M. Garcia and P. Berlind,
Smithsonian Astrophysical Observatory; and P. Callanan, University
College Cork, report that the low-mass x-ray binary Aquila X-1 (=
V1333 Aql) appears to be in a moderate-intensity outburst in quick-
look results from the RXTE All Sky Monitor.  Recent daily-average
flux levels in the band 2-12 keV are as follows:  Jan. 27, about 60
mCrab; 28, 120; 29, 190; 30, 260; Feb. 1, 310; 2-5, about 360.
Observations of the optical counterpart V1333 Aql from the Whipple
Observatory 1.2-m telescope on Feb. 6.543 UT yield V = 16.9.
Observations at other wavelengths are encouraged.

     Total visual magnitude estimates:  Jan. 3.09 UT, 12.6 (A.
Hale, Cloudcroft, NM, 0.41-m reflector); Feb. 1.75, 11.8 (M.
Meyer, Frauenstein, Germany, 0.25-m reflector); 4.09, 11.3 (R.
Keen, Mt. Thorodin, CO, 0.32-m reflector); 6.74, 11.4 (K.
Sarneczky, Raktanya, Hungary, 0.44-m reflector).

                      (C) Copyright 1997 CBAT
1997 February 12               (6558)            Daniel W. E. Green

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