Suggestion for reduction tutorial: Use pairs as sky frames

[amn3142]

A comment to help others in the reduction tutorial: I get a much better reduction for my target if I set the sky to a nearby exposure (rather than a dark as suggested in the reduction tutorial). I basically run data.sky, data.clean one at a time for sky-science pairs, flipping which is sky and science each time.

This works for me since the target is tiny on the FOV. Anyway I thought it would be helpful for other total newbies (like myself) to maybe put a comment like this in the reduction tutorial as an alternative where it suggests to use a dark right now.

[jluastro]

You might be interested in the helpful routine: sky.makesky_fromsci() You can send in a stack of science frames that are sparse, small, and widely dithered (so that there is enough blank patch). It will stack them with a good amount of positive outlier rejection (to mask the stars/galaxies when combining). It is incredibly poorly documented at the moment. But it worked in the past! Cheers, Jessica

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On Jun 30, 2022, at 9:13 AM, amn3142 ***@***.***> wrote: A comment to help others in the reduction tutorial: I get a much better reduction for my target if I set the sky to a nearby exposure (rather than a dark as suggested in the reduction tutorial). I basically run data.sky, data.clean one at a time for sky-science pairs, flipping which is sky and science each time. This works for me since the target is tiny on the FOV. Anyway I thought it would be helpful for other total newbies (like myself) to maybe put a comment like this in the reduction tutorial as an alternative where it suggests to use a dark right now. — Reply to this email directly, view it on GitHub <#18>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AALEJQBPZHGLQIRUXIXPNYTVRXBRVANCNFSM52J5EF5Q>. You are receiving this because you are subscribed to this thread.

[amn3142]

ooh thanks! I will give it a shot, that would definitely improve my life.