[Aavso-photometry] AX Per

[arne]

Keith Graham wrote:
> Hi Wolfgang,
> 
>> Nevertheless one should start with the obs right now as AX Per
>> shows beside the EA and the Z And light changes also some
>> (quasi) periodic changes in the 100-200d range and a rotation
>> effect due to the red giant filling its Roche lobe.
>>
>> Clear skies
>>  Wolfgang
> What filters are preferred? Would B, V, and I be sufficient or should R be
> included as well?
> 
Rc is not preferred at this time.  AX Per has strong Halpha
emission, and Rc will be heavily influenced by this line.
Time series is not necessary; once or twice per night is
a reasonable monitoring cadence.  It does not hurt to do
a time series night or two, just don't expect to see much.
You probably see visual observations and not CCD observations
in the database right now just because it is a difficult target
for most sites at this time of year.
Arne