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IAUC 6146: CH Cyg; N Aql 1995; 1995H

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IAUC number

                                                  Circular No. 6146
Central Bureau for Astronomical Telegrams
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
Phone 617-495-7244/7440/7444     TWX 710-320-6842 ASTROGRAM CAM

     T. Iijima, Asiago Astrophysical Observatory, reports:  "A
prismatic spectrogram (range 420-510 nm, resolution 0.3 nm at 500
nm) of this symbiotic star, taken at Asiago Observatory on Mar. 1.2
UT, shows that the emission lines of H I and He I (447.1 nm) have
P-Cyg profiles, with absorption features blueshifted by about -500
km/s.  On a spectrum taken one day earlier (Feb. 28.1), the emission
line of He I (447.1 nm) had a weak absorption component, but H I did
not show absorption.  A new mass ejection may have occurred abruptly.
In addition, the highly-blueshifted broad emission components of the
H I lines, first reported by Kuczawska et al. (1992, IBVS 3806) and
Iijima et al. (1994, A.Ap. 283, 919), have reappeared.  The radial
velocities of the broad component of H-beta are -1420 and -880 km/s
(double peak) on Feb. 28.1 and -1240 km/s on Mar. 1.2."

     J. Johnson, University of Wisconsin, and the Wisconsin Ultraviolet
Photopolarimeter Experiment team (part of the Astro-2 mission
aboard the space shuttle Endeavour) report an observation of N Aql
1995:  "We obtained a spectrogram (range 140-320 nm, resolution
about 1.6 nm) on Mar. 4.84 UT.  The spectrum is dominated by Mg II
at 280.0 nm.  N III] at 175.0 nm, the C IV doublet at 154.8 and
155.0 nm, and the C III] doublet at 190.7 and 190.9 nm are also
strong.  A line at 164.0 nm could be either He II A at 164.0 nm or
O I at 164.1 nm.  The O III Bowen fluorescence line at 313.3 nm is
seen, and perhaps the lines at 283.9 and 304.7 nm as well.  The
continuum rises toward longer wavelengths after a possible minimum
near 220.0 nm.  Another observation was planned for near Mar. 6.33
in order to obtain ultraviolet spectropolarimetry."
     Visual magnitude estimates by P. Schmeer, Bischmisheim,
Germany:  Feb. 21.206 UT, 9.5; 22.196, 9.4; 27.157, 9.7; Mar. 4.146,
10.0; 5.19, 10.0.

     R. H. McNaught, Anglo-Australian Observatory, reports the
following accurate position for SN 1995H:  R.A. = 11h06m55s.42,
Decl. = +7o10'19".6 (equinox 2000.0; uncertainty 0".4 in each
coordinate); the corresponding offsets from the galaxy's center are
19".7 west and 7".4 south.

1995 March 7                   (6146)            Daniel W. E. Green

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