Thu, 08/04/2022 - 19:12
From what I read, you use TransformApplier to transform your observations. However, I also see that when you set up a telescope, you can load the transform coordinates there as well.
If you add them to the scope are they automatically applied when you choose that scope for submission? In that case do you need to bother with TransforApplier at all? If they aren't automatically applied, why are they attached to the scope?
Bill
Bill:
Your questions are a little ambiguous. A little more detail would be helpful?
TA is now a part of VPhot, not a free standing program.
Yes, you add your coefficients to your applicable scope settings in VPhot. When you use 2 color transform in VPhot, the images that you have selected are analyzed and the magnitudes are automatically corrected. For TA, you load applicable non-transformed AAVSO Reports and the magnitudes are automatically corrected based on that scope.
Does this make sense? If not, we could communicate off-line.
Ken
Ken,
Thanks for helping me. Yes, I understand that TA is now part of VPhot.
I see that both "Two Color Transform" and "TransformApplier" use the coefficients attached to the scope.
The VPhot documentation doesn't really explain when to use TCT as opposed to TA. If I have both B & V images of a field then I would use TCT? Is that because it is more streamlined? If I only have a single filter image, I would transform it with TA?
Still trying to wrap my head around this.
Bill
TA has recently been added. It currently requires the use of only one comp.
TCT was kept because it may be easier/more efficient. It also allows multiple comps.
BTW, you cannot transform one filter image, except under specific conditions where the color of the target is known and does not change.
Ken
Thanks for the explanation. I will keep plugging away and get the process down.