Central Bureau for Astronomical Telegrams
IAUC 4091: V834 Cen; V1329 Cyg; PW Vul AND RS Oph; AG Dra
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Circular No. 4091
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM Telephone 617-495-7244/7440/7444
V834 CENTAURI
I. R. Tuohy, D. T. Wickramasinghe and N. Visvanathan, Mount
Stromlo and Siding Spring Observatories, telex: "We have detected
cyclotron harmonic features in the intensity spectrum of the AM-
Her variable V834 Cen = E1405-451 reminiscent of those seen in VV
Pup in 1979. Circular spectropolarimetric observations of V834
Cen obtained over four binary cycles with the Anglo-Australian
Telescope on May 11 show broad intensity maxima at 564 and 627 nm
and associated minima at 550 and 605 nm. The features are detected
only in the intensity spectrum and occur during maximum light
when the accretion column is dominant. The emission profiles are
asymmetric with an extended red wing, as expected for cyclotron
emission from a high-temperature plasma (T ~ 10 keV). We identify
the emission peaks with harmonic numbers 9 and 10 in a magnetic
field of 19 MG. This is the second accurate polar field determination
of an AM-Her system using the cyclotron harmonic method."
V1329 CYGNI
G. Wallerstein, Department of Astronomy, University of
Washington, reports that spectra (resolution 10 A/mm) of V1329 Cyg
taken on July 3.3 UT at the Dominion Astrophysical Observatory
show triple lines of [O III] with velocities -203, -15, and +148
km/s. Emission lines of H I, He I and Fe II show -11 km/s only.
Corrigendum. The observations during July 17-19 (IAUC 4085)
attributed to R. Ducoty were made by C. Scovil, Stamford, CT.
PW VULPECULAE AND RS OPHIUCHI
J. S. Albinson, M. F. Bode, A. Evans and M. J. Goldsmith
obtained optical and infrared photometry of PW Vul at the South African
Astronomical Observatory on July 1.99 UT: U = 12.98, B = 12.87,
V = 12.21, R = 12.42, I = 14.30. They also give photometry of RS
Oph: June 26.99 UT, U = 13.06, B = 13.01, V = 11.50, R = 10.35, I
= 9.44; June 27.93, U = 12.68, B = 12.85, V = 11.36, R = 10.23, I
= 9.37, J = 7.82, H = 7.00, K = 6.68, L = 6.4, M = 5.9, N > 4.5.
AG DRACONIS
Visual magnitude estimate by J. Bortle, Stormville, NY: June
9.1 UT, 9.9.
1985 August 6 (4091) Brian G. Marsden
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