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Use ccdVisit table skyNoise to compute DM image depth #67

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drphilmarshall opened this issue Nov 14, 2016 · 1 comment
Open

Use ccdVisit table skyNoise to compute DM image depth #67

drphilmarshall opened this issue Nov 14, 2016 · 1 comment
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@jbkalmbach
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Epic: Simplest Possible Error Model

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@drphilmarshall
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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.
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Conversation in LSSTDESC/Twinkles#407 is related to this issue

@jbkalmbach jbkalmbach mentioned this issue Nov 17, 2016
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