Central Bureau for Astronomical Telegrams
IAUC 5079: 1990W; 1990K; JUPITER
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Read IAUC 5080
Circular No. 5079
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
SUPERNOVA 1990W IN NGC 6221
M. Della Valle and L. Pasquini, European Southern Observatory,
report: "Preliminary inspection of low-resolution CCD spectra
(range 320-860 nm), obtained on Aug. 19.95 UT with the Max-Planck-
Institut 2.2-m telescope at La Silla, yields the characteristic
features of a type-Ia supernova about 10 days past maximum light. The
expansion velocity deduced from the minimum of the Si II 635-nm
absorption is 10 500 km/s. Additional absorptions of Na I (589 nm),
Fe II (492 nm), and Mg II (448 nm), appear blueshifted by 9800,
10 200, and 9000 km/s."
M. Phillips, Cerro Tololo Interamerican Observatory, reports
that P. McCarthy (Carnegie Observatory) obtained a spectrum of SN
1990W on Aug. 21.99 UT with the CTIO 4-m telescope that shows this
to be a type-Ic supernova near maximum light.
SUPERNOVA 1990K IN NGC 150
R. Lopez, University of Barcelona; J. A. Rodriguez and M.
Balcells, Observatorio de Roque de los Muchachos; and J. Cepa,
Instituto de Astrofisica Canarias, report: "We obtained low-resolution
spectra (range 330-1050 nm) of SN 1990K on Aug. 15 UT with the faint-
object spectrograph (FOS) on the ORM 2.5-m Isaac Newton Telescope at
La Palma. A spectrum of this type-II supernova was taken also on
Aug. 15 with the above instrumentation. The H-alpha P-Cyg feature
continues to be well established, but its emission wing has narrowed
relative to that of the spectrum taken by us last month (IAUC 5057).
However, the expansion velocity inferred from this feature has not
changed within the limit of errors. He I (706.5 nm), O I (777.3 nm),
and the Ca II infrared triplet are also present. [O II] (731.9,
733.0 nm) lines are beginning to appear."
JUPITER
The South Equatorial Belt of Jupiter appears to be darkening
once again (cf. IAUC 4819, 4861, 4863, etc.), according to reports
from several observers, including I. Miyazaki, F. Balella, D. Parker,
S. J. O'Meara, and J. Beish.
1990 August 22 (5079) Daniel W. E. Green
Read IAUC 5080
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