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June 1 2022

Single-frame 5 sigma point source depth for ATLAS is around 19.5, sky-limited. A stack of 100 images has 10X SNR so 5 sigma depth is 10X fainter, or 2.5 mag which gets us to 22nd. 

Two-band images give us a magnitude and a single color. Balmer break is at 364.5 nm. ATLAS band edges are:
blue edge of c: 420
red edge of 



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