Creating a sequence for Time Series / Transform Applier

Technology VPhot
1

Hi!
I’m analyzing images BBIVVV and I’ll try stack → TS ->TA
Does it make a difference what image I choose for a sequence? Single image vs stacked by filter?

Thanks!

Celsa

2

I like to use an un-stacked V to make the sequence.
Then, when I stack, I get a better SNR.
The sequence can be used for all the filters as long as the comps have magnitudes for all your filters BVRI.

Stack one color at a time. Do the photometry on the stack.
Same for all the colors.
Or you can stack colors, and do the photometry on all the stacked colors at the same time.
Transform the resultant files.

Ray

3

Thanks!
I tried the first method.