Central Bureau for Astronomical Telegrams
IAUC 4717: 1989e; 1988Y; V834 Cen
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Circular No. 4717
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 or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
COMET SHOEMAKER (1989e)
E. M. Shoemaker reports that C. S. Shoemaker has discovered her
fifteenth comet on exposures with the 0.46-m Palomar Schmidt. The comet
is strongly condensed, and there is a tail more than 5' long in p.a. 210 deg.
1989 UT R.A. (1950) Decl. m1
Jan. 13.527 10 12.4 +19 05 13
13.545 10 12.3 +19 06
14.385 10 11.0 +19 46
SUPERNOVA 1988Y IN ANONYMOUS GALAXY
F. Sanchez, A. Riera and A. Mampaso, Instituto de Astrofisica de
Canarias; R. Lopez and P.Ruiz-Lapuente, University of Barcelona; and
J. Cepa, La Palma Observatory and IAC, report: "Low-resolution spectra
taken on Jan. 6 with the faint-object spectrograph (range 500-900 nm) on
the 4.2-m William Herschel Telescope confirm that this supernova is of
type Ia about two months after maximum. The spectra show the
characteristic Fe II blends of lines at 480, 526, 552, 619 and 648 nm,
the Na I doublet at 586 nm, the O I feature at 750 nm and a blend of
lines at 815-830 nm, as well as another feature at 850-860 probably due
to O I and Ca II permitted transitions. In these spectra the
characteristic broad unidentified feature at 680-720 nm seems to be due
to a blend of a number of absorption lines. A spectrum of the anonymous
host galaxy confirms (from H alpha measurement) the redshift previously
given on IAUC 4690. The velocities inferred from the corrected
absorption minima reveal material moving at a wide range of velocities,
6000-9000 km/s for Fe II, 10 000 km/s for Na I and 17 000 km/s for O I.
High velocities are also measured for Ca II, although blending causes
them to be rather uncertain."
V834 CENTAURI
K. O. Mason and E. M. Puchnarewicz, Mullard Space Science Laboratory;
and P. G. Murdin, Royal Greenwich Observatory, report that the AM Her-type
variable V834 Cen (E1405-451) is apparently in a low state. Observations
with the 4-m Anglo-Australian Telescope on Jan. 6 and 7 show the star to
be at V about 17. The normally strong emission lines are weak or absent
in 400-1000-nm spectroscopy, and there is evidence for what may be the
spectral signature of the companion star in the red.
1989 January 14 (4717) Brian G. Marsden
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