THE ASTRONOMER Electronic Circular No 409          1990 May 5 15.30UT
Ed:Guy M Hurst, 16,Westminster Close,  Kempshott Rise,   Basingstoke,
Hants, RG22 4PP, England. Telephone:   (0256)471074  Int:+44256471074
Telex: 94082518 Answerback: TAGUY                 Microlink: MAG60138
JANET:GMH @ UK.AC.CAM.ASTRONOMY.STARLINK or GUYH@UK.AC.SUSSEX.CLUSTER
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V3890 SAGITTARII
R. M. Wagner and R. Bertram, Ohio State University; and S. G.
Starrfield, Arizona State University, report:  "Optical spectra
obtained of V3890 Sgr on May 2.38 UT, using the OSU CCD spectrograph
(range 597.5-713.0 nm, resolution 0.2 nm) on the Perkins 1.8-m
telescope at the Lowell Observatory, show strong and broad emission
lines of H-alpha, He I (667.8, 706.5 nm), and numerous weaker
features. [Fe VII] at 608.5 nm is present.  He I at 706.5 nm exhibits
a weak P-Cyg profile.  The FWHM and FWZI of H-alpha emission are
2140 and 8600 km/s, respectively.  The interstellar line at 628.4 nm
is present with an equivalent width of about 0.1 nm.  The spectrum
is very similar to that of the recurrent nova V745 Sco (IAUC 4822,
4825, 4826) early in its 1989 outburst.  A spectrum of V3890 Sgr in
quiescence is presented by Williams (1983, Ap.J. Suppl. 53, 523)."
IAUC 5006
Recent estimates reported to TA:
1990 Apr 28.72UT, 8.6 (A.Jones, New Zealand); 29.85, 9.1 (A.Pearce,
Australia); May 1.85, 9.4 (Pearce); 3.063UT, 10.1 (S.Korth,
(West Germany); 4.060, 9.9 (Korth).
 
SUPERNOVA 1990I IN NGC 4650A
O. Pizarro, J. Miranda, and L. Pasquini, European Southern
Observatory; and B. Leibundgut, Center for Astrophysics, report their
discovery of a supernova in NGC 4650A (R.A. = 12h42m05s, Decl. =
-40 26'.5, equinox 1950.0); the object is located 14" east and 47"
south of the galaxy nucleus, and was found on an ESO Schmidt B plate
taken on Apr. 27.1 UT.  Pasquini, B. Jarvis (ESO), and Leibundgut
report that a spectrum (spectral range 540-920 nm) of SN 1990I
obtained on Apr. 30.1 by J. P. Sivan, Marseille, with the ESO 1.5-m
Spectroscopic Telescope resembles a type-Ia supernova 5-6 weeks past
maximum.  CCD photometry on Apr. 29.3 by V. Burwitz, Berlin, with
the 2.2-m telescope shows the supernova at mb = 16.7 and mv = 15.6.
The object is in or superimposed on the polar ring of this well-known
ring galaxy (Whitmore et al. 1987, Ap.J. 314, 439).
IAUC 5003
 
HUBBLE SPACE TELESCOPE
Patrick Schmeer, West Germany, reports that he observed this object
on May 2 at 02.58.40UT using 20x80B and estimated it at magnitude 5.
 
V795 CYGNI
Further estimates by Schmeer: Apr 22.04,13.0; 26.08,13.5; 29.07,14.1
 
Guy M Hurst