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Norwegian Astronomical Society - Variable Star Section
VARIABLE STARS - REPORT OF 1992 SEPTEMBER 21
Recent visual observations by members of NAS.VSS. Time system is U.T.
Observers: DAH = H. Dahle (Oslo), GRL = B. H. Granslo (Fjellhamar).
1. NOVAE AND RECURRENT NOVAE
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Variable 1992 UT Magn Obs 1992 UT Magn Obs 1992 UT Magn Obs
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T CrB Sep 17.80 10.3 DAH Sep 19.83 10.4 GRL Sep 19.88 10.3 DAH
N1992 Cyg Sep 17.867 9.0 DAH Sep 19.833 9.0 GRL Sep 19.838 9.0 DAH
N1992 Cyg Sep 20.852 8.9 GRL Sep 20.870 9.0 DAH
RS Oph Sep 12.82 10.8 GRL Sep 16.87 10.9 GRL Sep 19.82 11.0 GRL
GK Per Sep 20.07 13.0 GRL
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The recurrent nova RS Ophiuchi underwent a minor outburst in late august
and is still somewhat brighter than usual.
2. DWARF NOVAE
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Variable 1992 UT Magn Obs 1992 UT Magn Obs 1992 UT Magn Obs
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RX And Sep 19.85 13.7 DAH Sep 19.92 13.2 GRL Sep 20.87 13.7 DAH
Z Cam Sep 16.87 10.9 GRL Sep 20.85 11.0 GRL
SS Cyg Sep 19.83 12.0 GRL Sep 19.84 12.0 DAH Sep 20.87 12.0 DAH
EM Cyg Sep 19.84 12.7 DAH Sep 19.86 13.3 GRL Sep 20.86 13.2 GRL
AB Dra Sep 20.08 12.8 GRL Sep 20.86 12.7 GRL
AH Her Sep 19.87 12.5 DAH Sep 19.88 13.1 DAH
AY Lyr Sep 19.85 12.8 DAH Sep 19.85 13.1 GRL
RU Peg Sep 17.84 12.0 DAH Sep 19.83 11.3 GRL Sep 19.84 11.5 DAH
RU Peg Sep 20.85 11.7 GRL Sep 20.87 11.5 DAH
TZ Per Sep 17.82 13.2: DAH Sep 19.86 13.1 DAH
SU UMa Sep 16.84 <13.4 DAH Sep 19.87 12.6 DAH Sep 20.08 13.0 GRL
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Dwarf novae in outburst: Z Cam, EM Cyg, AB Dra, AH Her, AY Lyr, RU Peg,
TZ Per (at standstill?), SU UMa. RX And and SS Cyg was seen near minimum.
According to recent observations by P. Schmeer EF Pegasi is not in outburst
as reported on Sep 18. The observation from Sep 17 (and later estimates
from Sep 19 and 20) probably refer to the mag. 13 star located 5" from the
dwarf nova at PA 300 degrees (see e.g.TA E-Circulars No. 570 and 574).
3. OTHER VARIABLES
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Variable 1992 UT Magn Obs 1992 UT Magn Obs 1992 UT Magn Obs
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TT Ari Sep 13.01 10.5 GRL Sep 16.92 10.6 GRL Sep 20.01 10.6 DAH
AX Per Sep 12.01 11.8 GRL Sep 16.92 11.9 GRL Sep 20.07 12.0 GRL
FG Sge Sep 16.88 11.4 GRL Sep 19.83 11.6 GRL Sep 20.85 11.6 GRL
RR Tau Sep 13.00 11.0 GRL Sep 16.96 10.8 GRL Sep 20.07 10.9 GRL
CQ Tau Sep 13.00 9.5 GRL Sep 16.96 9.7 GRL Sep 20.07 9.4 GRL
WW Vul Sep 16.88 10.6 GRL Sep 19.83 10.5 GRL Sep 20.85 10.5 GRL
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FG Sagittae has now faded about 2.5 magnitudes from its maximum brightness.
Bjorn H. Granslo
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