Using imageDifference with coAdds

Support
#1

Hi all,

Any suggestions on how to get imageDifference.py working with coadd images as the reference images? We can get it to work by setting --templateId, but not with coadds. Instead, we get the warning:

WARN: deepCoadd_sub, tract=0, patch=2,3 does not exist

despite that tract and patch existing in our deepCoadd and deepCoadd-results directories. Soon after the warning, the stack crashes, saying it can’t find that patch. We’ve tracked the warning to line 109 of ip_diffim/getTemplate.py.

We’ve based our obs_* package on obs_subaru. We were wondering whether we need to add/change anything in our policy file or mapper script to get this to work with coadds. Our obs_* package is here.

Thanks,

James

#2

This is just a hunch, but if you manually specify the filter in patchArgsDict on line 100 of getTemplate.py, does that fix it? You could also try the ip_diffim branch tickets/DM-7435, which has a proper fix for that one issue.

#3

Thanks, Colin. We tried that branch you mentioned which fixed the problem.

Much appreciated.

#4

Great. I’ll make sure that fix gets pushed into the stack.