Date: Sat, 24 Dec 2022 15:16:14 -0700
Subject: Re: [sloan-25mlog 6440] 2.5m obslog 20221223 (SJD 59937)
From: "Daniel Oravetz"
> - Attention to John Donor. Field 104363 design 127925 showed unusually low
> S/N2
>   (with good conditions and good APOGEE signal). Nevertheless, after the
> first
>   exposures with S/N2=0.27 it was declared as done by Kronos. I took more
>   exposures for it, just in a case. Next design 127926 for the same field
> had
>   better S/N, but after its first exposure with not complete S/N2=1.2 it
> was also
>   declared as done
I observed those two designs two nights ago and they proved to be the rare
exception where the b1 SN2 thresholds were met with one exposure but r1
was just short. I suspect your exposures last night were sufficient to
push r1 beyond the completeness threshold.