Central Bureau for Astronomical Telegrams
IAUC 4664: N LMC 1988 No. 2; COORDINATED STUDY OF AGN VARIABILITY
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Circular No. 4664
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
NOVA IN THE LARGE MAGELLANIC CLOUD 1988 No. 2
M.-T. Ruiz, Universidad de Chile; and S. R. Heathcote, Cerro
Tololo Interamerican Observatory, report: "Spectra (range 360-690
nm, resolution 1.2 nm) obtained with the CTIO 4.0-m telescope on
Oct. 15.31 UT show broad emission from the Balmer lines and from Fe II
(492.5, 502.1 and 517.9 nm) superposed on a strong very blue continuum.
The Balmer lines exhibit prominent P-Cyg profiles. The emission
components, centered on an LSR velocity of 200 +/- 30 km/s have a FWHM
of 3100 +/- 30 km/s, while the LSR velocity at the violet edge of
the absorption trough is -3650 +/- 30 km/s (average values for H-alpha
through H-epsilon). The Balmer decrement is relatively shallow
H-alpha:H-beta:H-gamma:H-delta:H-epsilon = 218:100:63:50:40."
R. H. McNaught, Siding Spring Observatory, reports that a
T-Max 400 film exposed Oct. 11.65 shows no object at the position of
the nova to mag 12.0, and there appears to be no candidate to J
= 21.5 on a 1975 Dec. 12 U.K. Schmidt survey film.
COORDINATED STUDY OF AGN VARIABILITY
B. M. Peterson writes: "A large international consortium of
observers will be pooling their efforts to study continuum and broad
emission-line variability in active galactic nuclei. The cornerstone
of this effort is a joint ESA/SERC/NASA project to observe the
variable Seyfert 1 galaxy NGC 5548 every four days with the International
Ultraviolet Explorer, from 1988 Dec. 14 to 1989 mid-Aug. Additional
efforts will be focused on other variable objects, specifically Akn 120,
Mrk 79, Mrk 279, Mrk 509, NGC 4593, and 3C 446. High-quality
spectrophotometry, CCD imaging, and optical and infrared photometry of
these sources are high priorities. Unique simultaneous observations of
other types are also being encouraged. All those who might be
interested in participating in this large-scale effort are encouraged
to contact the organizers. Please inform the organizers of the type of
observations you might be able to supply and the particular sources
from the above list that you might be able to observe. Rapid and
frequent communication among participants is regarded as a very high
priority, and communication is being carried out as much as possible
via electronic mail. If you wish to participate or wish to receive a
project description, please contact me at Department of Astronomy,
Ohio State University, 174 West 18th Ave., Columbus, OH 43210, U.S.A.
(or PETERSON@OHSTPY.BITNET; telephone 614-292-7886; FAX 614-292-2928;
telex 245334)."
1988 October 17 (4664) Daniel W. E. Green
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