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

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.