Central Bureau for Astronomical Telegrams
IAUC 3696: RY Sgr; N Aql 1982; CW 1103+254; SN IN Anon GALAXY
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Read IAUC 3697
Circular No. 3696
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 617-864-5758
RY SAGITTARII
M. W. Feast, South African Astronomical Observatory, telexes
that J. Hers communicates the following visual magnitude estimates
of this R-CrB variable: May 10, 9.9 (Higgs); May 12, 10.7 (Fleet).
S.A.A.O. photometry shows that RY Sgr recovered from its last
minimum (IAUC 3683) to V = 8.49 on Mar. 25 and has subsequently faded.
NOVA AQUILAE 1982
J. Mattei, AAVSO, communicates further visual magnitude
estimates: Apr. 8.40 UT, 12.9 (C. Scovil, Stamford, CT); 14.38, 13.0
(Scovil); 19.37, 12.3 (Scovil), 23.37, 12.6 (Scovil); May 5.34,
11.9 (Scovil); 7.31, 12.2 (P. Collins, Cambridge, MA).
CW 1103+254
H. Stockman, C. Foltz, S. Tapia and G. Schmidt, Steward
Observatory; and S. Grandi, University of California at Los Angeles,
report the discovery of a new AM-Her variable at R.A. = 11h02m58s.0, Decl. =
+25o22'42" (equinox 1950.0; from a preprint by Shore et al.). The
lightcurve and linear and circular polarization variations are very
similar to those of VV Pup, with an ephemeris for peak linear
polarization near the end of the bright phase of HJD 2445059.7024 +/-
0.0003 + E (0.079087 +/- 0.000001). CW 1103+254 has an unusually
brief and red bright phase (V = 15.5, B-V = +1.0, U-B = -0.8),
lasting less than 40 min of the 114-min period. Strong linear and
negative circular polarization are present throughout the bright
phase, maximum values being 16 and -20 percent, respectively, in
white light, and they are absent during the faint phase (V = 17.0,
B-V = -0.1, U-B = -0.9). The emission-line spectrum is similar to
other AM-Her variables with both broad and narrow components of the
Balmer series, He I and He II. Spectropolarimetric data obtained
at Lick Observatory show Zeeman split H-beta and H-gamma absorption features
during the faint phase corresponding to a mean surface field
strength of 20 MG. During the bright phase, a broad absorption and
polarization feature near 630 nm at field 13-15 MG has been
tentatively identified as H-alpha sigma-.
SUPERNOVA IN ANONYMOUS GALAXY
The discovery reported on IAUC 3693 was made on a plate taken
by L. E. Gonzalez.
1982 May 17 (3696) Brian G. Marsden
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