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IAUC 6011: 1994U; N Oph 1994; N Sgr 1994 No. 2

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                                                  Circular No. 6011
Central Bureau for Astronomical Telegrams
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505

     Timothy Barker, Department of Physics and Astronomy, Wheaton
College, reports the discovery of a supernova during a CCD survey
with a 0.36-m telescope, the object being located very close to the
center of NGC 4948 (R.A. = 13h02m.3, Decl. = -7o41', equinox 1950.0).
When found on June 27.10 UT, SN 1994U was at mag about 14; it was
not visible on a similar image taken on June 10 (limiting mag about
16.0) or on other images taken over the last 14 months.
     S. Benetti, European Southern Observatory (ESO); and C. Zanin,
Astronomy Department, Padua University, report that inspection of a
fully-reduced CCD spectrogram (range 345-920 nm, resolution 0.6 nm),
obtained on June 27.95 UT with the ESO 1.5-m telescope (+ Boller &
Chivens spectrograph), confirms that SN 1994U is a typical type-Ia
supernova at maximum light.  The spectrum is dominated by strong P-
Cyg lines of intermediate-mass elements superimposed on a blue
continuum.  Visible lines include Ca II (H and K; infrared triplet);
Si II (505.1, 597.2, 635.5 nm), Mg II (448.1 nm), S II (546.8,
561.2, 565.4 nm), and O I (777.3 nm).  The expansion velocity
deduced from the minimum of the Si II 635.5-nm line, corrected by
the redshift (0.0048) of the parent galaxy and deduced by the Na I
D interstellar lines, is about 11200 km/s.

     L. V. Morrison and R. W. Argyle, Royal Greenwich Observatory,
report the following accurate optical position for N Oph 1994,
obtained from 14 observations with the Carlsberg Automatic Meridian
Circle on La Palma:  R.A. = 17h35m44s.681 +/- 0s.004, Decl. =
-19o19'34".02 +/- 0".07 (equinox J2000.0, FK5 reference frame;
epoch 1994.46).  The following V magnitudes have also been obtained
(+/- 0.05 mag):  June 7.07 UT, 9.66; 9.07, 9.46; 10.07, 9.54;
11.06, 9.60; 12.06, 9.66; 13.06, 9.89; 16.05, 10.49; 17.05, 10.60;
18.04, 10.62; 19.04, 10.59; 20.04, 10.66; 21.03, 10.85; 25.02,
11.07; 26.02, 11.20.

     Morrison and Argyle also report the following position for
this nova from 10 observations: R.A. = 18h30m23s.114 +/- 0s.004,
Decl. = -17o11'56".87 +/- 0".08 (equinox J2000.0, FK5 reference
frame; epoch 1994.46).

1994 June 28                   (6011)            Daniel W. E. Green

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