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Date: Mon, 17 May 1993 20:19:55 +0200
From: granslo@argo.uio.no
Subject: Observations of Eruptive and Cataclysmic Variables
*** VARIABLE STAR OBSERVATIONS - REPORT OF 1993 MAY 17 ***
This report contain recent observations of eruptive and cataclysmic
variables. Time system is Universal Time. All observations are by
undersigned.
1. NOVAE AND RECURRENT NOVAE
Variable Date UT Magn Date UT Magn Date UT Magn
T CrB Apr 25.98 10.4 Apr 26.93 10.4 Apr 27.93 10.4
T CrB Apr 28.93 10.4 Apr 29.91 10.4 May 1.02 10.3
T CrB May 1.97 10.3 May 5.97 10.4 May 8.01 10.5
T CrB May 8.99 10.5 May 9.96 10.5 May 10.92 10.5
T CrB May 11.95 10.5 May 12.96 10.5 May 16.99 10.5
V1974 Cyg Apr 25.983 11.6 Apr 26.917 11.6 Apr 27.917 11.6
V1974 Cyg Apr 28.935 11.6 Apr 29.938 11.7 May 1.011 11.6
V1974 Cyg May 1.983 11.6 May 6.007 11.7 May 7.956 11.8
V1974 Cyg May 8.985 11.8 May 9.944 11.9 May 10.931 11.9
V1974 Cyg May 11.951 11.9 May 12.963 11.9 May 16.952 11.9
RS Oph Apr 18.04 11.5 Apr 20.05 11.5 Apr 22.08 11.7
RS Oph May 8.02 11.7: May 9.02 11.7 May 9.98 11.8
RS Oph May 10.99 11.7 May 11.99 11.7 May 13.01 11.6
N1993 Oph Apr 22.08 9.8:
SN 1993J Apr 25.978 11.5 Apr 26.915 11.7 Apr 27.915 11.7
SN 1993J Apr 28.929 11.8 Apr 29.925 11.9 May 1.008 11.9
SN 1993J May 1.978 11.9 May 5.968 12.2 May 7.927 12.4
SN 1993J May 8.989 12.4 May 9.943 12.5 May 10.929 12.6
SN 1993J May 11.949 12.5 May 12.961 12.5 May 16.949 12.6
The recurrent novae T CrB and RS Oph were detected near minumum.
V1974 Cyg (Nova 1992) is fading slowly. The current fade of
SN 1993J has apparently slowed down. Nova Oph 1993 was seen
near maximum under difficult conditions (low altitude) on Apr 22.
According to observations by Japanese observers it has now faded
to mag. 12.5. The new possible nova in Aquila, located at RA =
19h13.1m, Dec = + 1d 34' (2000.0), has not been observered as the
news about discovery was not received until today.
2. DWARF NOVAE
Variable Date UT Magn Date UT Magn Date UT Magn
SS Aur Apr 28.93 <12.5 May 7.95 <12.5 May 9.96 <12.5
SS Aur May 10.92 <12.5 May 11.96 <12.5 May 12.94 <12.5
TT Boo May 9.96 <13.3: May 10.99 <13.3: May 11.97 <13.3:
Z Cam Apr 22.06 11.5 Apr 25.98 11.5 Apr 26.91 11.5
Z Cam Apr 27.91 11.5 Apr 28.93 11.5 Apr 29.92 11.5
Z Cam May 1.00 11.5 May 1.98 11.5 May 5.97 11.5
Z Cam May 7.92 11.5 May 8.99 11.5 May 9.94 11.5
Z Cam May 11.95 11.5 May 12.96 11.6 May 16.95 11.6
SS Cyg Apr 22.07 11.8 Apr 25.98 11.9 Apr 26.92 11.8
SS Cyg Apr 27.92 11.8 Apr 28.93 11.8 Apr 29.94 11.8:
SS Cyg May 1.01 11.7 May 6.00 11.9 May 7.96 11.8
SS Cyg May 8.98 11.8 May 9.94 11.8 May 10.93 11.8
SS Cyg May 11.95 11.8 May 12.97 11.8 May 16.95 11.5
EM Cyg Apr 20.01 13.8: Apr 22.07 13.3 Apr 27.95 12.2
EM Cyg May 10.98 <13.4 May 11.97 <13.4 May 12.97 <13.4
EY Cyg May 10.98 <13.1 May 11.97 <13.1 May 12.97 <13.1
AB Dra Apr 18.02 12.6 Apr 19.96 13.6 Apr 27.95 12.5
AB Dra Apr 28.93 12.6 Apr 29.97 13.0: May 11.97 <13.2:
U Gem Apr 26.91 <11.9 Apr 27.91 <12.3 May 10.92 <11.9
AH Her Apr 22.08 12.7 Apr 25.98 11.6 Apr 26.93 11.2
AH Her Apr 27.92 11.2 Apr 28.93 11.1 Apr 29.92 11.2
AH Her May 1.98 11.4 May 9.96 <13.0: May 10.99 <13.0:
SU UMa Apr 18.01 <13.4 Apr 19.96 13.6 Apr 22.06 <13.2
SU UMa Apr 27.93 12.9 May 10.99 12.9 May 11.97 12.8
The following dwarf novae has been detected in outburst: EM Cyg,
AB Dra, AH Her (bright maximum) and SU UMa (two maxima). Z Cam is
apparently in standstill.
3. OTHER VARIABLES
Variable Date UT Magn Date UT Magn Date UT Magn
Z And Apr 22.08 10.7 Apr 26.03 10.7 Apr 27.98 10.7
Z And May 1.01 10.7 May 6.01 10.7 May 8.97 10.8
Z And May 10.97 10.8 May 12.97 10.6 May 16.99 10.8
EG And Apr 13.97 7.5 Apr 28.90 7.5 May 9.98 7.5
R CrB Apr 21.99 5.7 Apr 26.05 5.8 Apr 27.98 5.8
R CrB Apr 29.96 5.8 May 6.03 5.8 May 7.96 5.9
R CrB May 10.93 5.9 May 12.98 5.9 May 16.99 5.9
BF Cyg Apr 22.07 12.1 Apr 26.02 12.0 Apr 27.95 12.0
BF Cyg May 1.01 12.0 May 6.01 12.0: May 8.98 12.1
BF Cyg May 10.98 12.0 May 12.97 12.1 May 17.00 12.0
CH Cyg Apr 25.98 8.1 Apr 27.92 8.0 Apr 29.94 8.1
CH Cyg May 1.99 8.2 May 6.01 8.3 May 8.98 8.2
CH Cyg May 10.98 8.1 May 12.97 8.1 May 17.00 8.0
V482 Cyg Apr 22.07 11.3 Apr 26.02 11.4 Apr 27.95 11.2
V482 Cyg May 1.01 11.1 May 6.01 11.3 May 8.98 11.3
V482 Cyg May 10.98 11.4 May 12.97 11.3 May 17.00 11.3
AX Per Apr 20.02 11.7 Apr 22.08 11.7 Apr 26.97 11.7
AX Per May 8.02 11.7 May 9.97 11.7 May 11.99 11.7
FG Sge Apr 20.04 11.4 Apr 22.04 11.4 Apr 26.03 11.5
FG Sge Apr 27.02 11.6 Apr 28.00 11.8 May 8.02 11.5
FG Sge May 9.02 11.6 May 9.97 11.5 May 11.00 11.5
FG Sge May 11.98 11.5 May 12.99 11.6 May 17.00 11.6
WW Vul Apr 18.04 11.0 Apr 20.04 11.0 Apr 22.07 10.9
WW Vul Apr 26.03 11.1 Apr 27.02 11.7 Apr 27.99 11.7
WW Vul May 1.02 11.4 May 6.01 11.5: May 8.02 10.9
WW Vul May 9.02 11.0 May 9.96 11.1 May 10.99 10.9
WW Vul May 11.98 11.0 May 12.99 11.1 May 17.00 11.4
The symbiotic variables Z And, BF Cyg, and AX Per were detected
near minimum. The magnitude of FG Sge is combined with its close
companion, but has clearly brightened during the last months.
WW Vul (Isa) has apparently been very active.
Regards,
Bjorn H. Granslo
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