Use ccdVisit table `skyNoise` to compute DM image depth

LSSTDESC / Monitor

Extract light curves for time-variable cosmological objects

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Use ccdVisit table `skyNoise` to compute DM image depth #67

Open drphilmarshall opened 7 years ago

drphilmarshall commented 7 years ago

Since it's in DN, I guess we want to do

D_sky = zeroPoint - 2.5*np.log10(5*skyNoise)

What kinds of numbers does this give? Let's plot D_sky against D_sigma where the latter is our simple estimate based on the median flux uncertainty across all DIAsources in the visit.

jbkalmbach commented 7 years ago

Conversation in DarkEnergyScienceCollaboration/Twinkles#407 is related to this issue