Central Bureau for Astronomical Telegrams
IAUC 5008: LILLER'S Var IN Sgr; N LMC 1990 No. 1; 1987A
The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).
Read IAUC 5009
Circular No. 5008
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
LILLER'S VARIABLE IN SAGITTARIUS
R. M. Wagner, Ohio State University; S. G. Starrfield and S.
Austin, Arizona State University, report: "Optical spectra of
Liller's nova candidate (IAUC 4974, 4978) were obtained on May 6.42
UT using the CCD spectrograph (range 450.0-710.0 nm, resolution 1.0
nm) on the Perkins 1.8-m telescope at the Lowell Observatory.
These spectra show emission lines of H-alpha, H-beta, He I (706.5,
667.8, 587.6 nm), He II 468.6 nm, and the C III/N III blend at
464.0-465.0 nm. The FWHM of H-alpha emission is about 400 km/s.
The interstellar lines at 628.4 nm and Na D 589.6-nm are also
present. Forbidden lines characteristic of a classical nova are not
present. These observations suggest that this object is probably a
dwarf nova that has an unusually fast and large amplitude outburst,
such as WZ Sge."
NOVA IN THE LARGE MAGELLANIC CLOUD 1990 No. 1
T. Harrison, Mount Stromlo Observatory, reports further infrared
photometry of this object, obtained with the Infrared Photometry
System on the 2.3-m reflector at Siding Spring: Mar. 10.4 UT, J =
14.43 +/- 0.06, H = 13.48 +/- 0.07, K = 13.74 +/- 0.06. The colors
remain similar to those of the February observations (cf. IAUC 4968),
with the flux at H continuing to be anomalously high.
SUPERNOVA 1987A IN THE LARGE MAGELLANIC CLOUD
F. C. Witteborn, J. D. Bregman, and D. H. Wooden, NASA Ames
Research Center; D. M. Rank, University of California Observatories
and Lick Observatory; and M. Cohen, University of California,
Berkeley, communicate: "Spectra of SN 1987A from 5.4 to 8.0 microns
obtained from the Kuiper Airborne Observatory on Apr. 14 and 17 UT
at resolution 0.043 micron exhibit only one possible line detection
of (3.6 +/- 1.5) x 10E-19 W/cm2 at 6.636 microns (Ni II). The
apparent line strength of Ni II was 27 times lower than the 9.6 x
10E-18 W/cm2 measured in 1989 April. The average continuum level
was zero with a 1-sigma upper limit of 4 x 10E-19 W/cm2/micron, at
least 5 times lower than the continuum observed in 1989 April.
Spectra from 4.6 to 5.4 microns obtained on Apr. 16 at resolution
0.027 micron showed no emission lines above 4 x 10E-20 W/cm2 (1-
sigma) and an average continuum of (2.9 +/- 2.7) x 10E-19
W/cm2/micron."
1990 May 9 (5008) Daniel W. E. Green
Read IAUC 5009
Our Web policy. Index to the CBAT/MPC/ICQ pages.
