ECLIPSING DWARF NOVAE PROGRAMME
UPDATE May 5th 2011
This programme has not been updated for some time which has not been due to
lack of interest but more due to lack of time on the part of the Director.
However, following an exchange of emails which were initiated by another
outburst of SV CMi Mike Simonsen updated some of the information for which
I'm most grateful and I've now investigated the programme further.
AR And: Plenty of photometry has revealed no eclipses so this star is
dropped.
FO And: The data to date appears to rule out eclipses. Drop
SV CMi: Plenty of data but no eclipses. Dropped
KU Cas: Insufficient data. Retain.
V516 Cyg: Data received indicates no eclipses. Drop.
V1060 Cyg: Still insufficient time-series observations to rule out eclipses
so retain.
ES Dra: There has been plenty of data on this star which has not revealed
any sign of eclipses and therefore this star is dropped.
CY Lyr: Quite a lot of data by the director but no sign of actual eclipses.
Dropped.
LL Lyr: Insufficient data. Retain.
V426 Oph: Insufficient data. Retain.
HX Peg: Superhumps but no eclipses. Drop.
FY Vul: Insufficient data. Retain.
PY Per: Insufficient data although RP data looks intersting. Retain.
The revised programme now becomes:
Object Name
Coordinates (J2000.0) Type
Min Max
T1 P_orb(h)
T2 P_shu(h)
-------------------------------------------------------------------------------------------------------------------------------------------------------------
KU Cas 01
31 02.4 +57 54 12 UGSS
18.0p 13.3p ?
?
V1060 Cyg 21 07 42.2 +37 14 09 UGSS 18.0p 13.5p ? ?
LL Lyr 18 35 12.8 +38 20 04 UG 17.1 12.8 ? 5.978
V426 Oph 18 07 51.7 +05 51 48 NL 13.4 11.5 17-55 6.847
FY Vul 19 41 40 +21 45 59 UGZ: 15.3B 13.4B ? ?
PY Per 02 50 00.1 +37 39 23 UGZ: 19.8 13.0 ------ 3.715
Key:
Data taken from VSX, The Z Cam List, AAVSO data and BAA VSS data.
p photographic magnitude
T1 Normal outburst interval (days)
T2 Superoutburst interval (days)
UG Dwarf Nova, U Gem type
UGSS Dwarf Nova, SS Cyg type
UGZ Dwarf Nova, Z Cam type
UGSU Dwarf Nova, SU UMa type
NL Dwarf Nova, Nova-like
It would be good if observers suitably equipped could concentrate their
efforts on these few remaining stars in an effort to see whether they show
eclipses or not.