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IAUC 5767: N Oph 1993; 1993J

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                                                  Circular No. 5767
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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
MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)


NOVA OPHIUCHI 1993
     M. Della Valle, European Southern Observatory; and M. Turatto
and M. Lazzarin, Osservatorio Astronomico di Padova, report: "
Spectrograms (range 400-1000 nm, resolution about 1 nm) obtained on Apr.
18.4 UT, with the New Technology Telescope (+ EMMI) and the 1.52-m
reflector (+ Boller & Chivens spectrograph) at La Silla, confirm
this object as a nova caught during its early decline.  The spectrum
is dominated by emission lines of H, Fe II (mult. 42, 49, 73,
74), Na I, N I, O I, and Ca II.  H-alpha is flanked by a weak,
blueshifted, P-Cyg profile.  The expansion velocity derived from the
minimum of the P-Cyg absorption is about 3600 km/s."
     Further visual magnitude estimates:  Apr. 17.51 UT, 9.7 (A.
Jones, Nelson, New Zealand); 17.52, 9.4 (D. A. J. Seargent, The
Entrance, New South Wales, Australia); 17.74, 9.4 (Jones); 18.54,
9.5 (P. F. Williams, Heathcote, N.S.W.); 18.70, 9.4 (Y. Kushida,
Yatsugatake South Base Observatory; photoelectric V); 18.70, 9.3
(S. Takahashi, Shiga, Japan); 18.81, 9.4 (P. J. Camilleri, Cobram,
Vic., Australia).


SUPERNOVA 1993J IN NGC 3031
     L. V. Morrison and R. W. Argyle, Royal Greenwich Observatory;
and L. Helmer, Copenhagen University Observatory, report the following
accurate optical position, obtained with the Carlsberg Automatic
Meridian Circle on La Palma:  R.A. = 9h55m24s.778, Decl. =
+69 01'13".70 (equinox J2000.0, FK5 reference frame; epoch 1993.27;
accuracy 0".10 in R.A. and Decl.); the corresponding B1950.0 position
is R.A. = 9h51m19s.045, Decl. = +69 15'26".42.  The position
is the mean of seven observations, and will be improved further
after more observations are secured.
     Further photoelectric photometry (cf. IAUC 5750, 5755, 5758):
Apr. 2.93 UT, V = 11.42 (Morrison, Argyle, and Helmer; same instrument
as used above; +/- 0.04); 7.92, V = 11.50 (Morrison et al.);
8.91, V = 11.47 (Morrison et al.); 10.91, V = 11.23 (Morrison et
al.); 15.90, V = 10.91 (Morrison et al.); 16.88, V = 10.80 +/- 0.04,
B-V = +0.59 +/- 0.05 (D. Hanzl, N. Copernicus Planetarium, Brno);
16.90, V = 10.88 (Morrison et al.); 17.86, V = 10.81 +/- 0.03, B-V
= +0.63 +/- 0.03 (Hanzl); 17.90, V = 10.81 (Morrison et al.).


1993 April 19                  (5767)            Daniel W. E. Green

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