Hi Tim,

Looking at your spreadsheet, I think one problem is that you have the whole thing growing as a power of 0.56, because you have made the time-dependent size a fixed fraction of the deep size. Instead, one grows linearly and the other roughly like the square root. I haven't yet had the time to completely understand what you've done.

I think the spreadsheet is correct here, there is NO dependency of
time-related data on the 0.56 number, and the time-dependent data
does grow linearly.


>> I think the fraction of variable objects per field is way too high,
>> particularly as the number of objects increases with increasing
>> depth. Most of the deeper objects will be galaxies and the
>> fraction of agn, SN
>> whatever in galaxies is more like .01 than 0.1.
>>
>>
> I agree that this fraction is too high (this one didn't come from me!),
> but it shouldn't affect the size numbers!   Any object that has useful
> S/N in a single visit should have entries in the time dependent
> database, whether it is variable or not.

It sounds like I should not be using a simple 0.1 or 0.01 fraction here, and we need to rewrite the formula. I will need some hints how to model this.

thanks,
Jacek


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