From: David Schlegel
Subject: Re: 2.5m obslog 20061216 (MJD 54086)
Date: Sun, 17 Dec 2006 19:27:45 -0800
Steph,
It should be OK to just rely upon the red S/N values for these plates
(numbers 2634-2640).  However, we really will need at least (S/N)^2 = 20
in each of the red cameras.
The objects on this plate are really quite faint.  Reductions from last
night show about half the objects as "unclassified" with that 1 hr of
exposure,
so we definitely need more photons.
Thanks
David
On Dec 17, 2006, at 11:24 AM, stephanie snedden wrote:
> If you don't hear otherwise from David Schlegel by tonight, go
> ahead and observe this plate again until you get (S/N)**2 > 20 in
> r1 and r2. We won't declare it done until we hear from David,
>
> Steph
> On Dec 17, 2006, at 7:28 AM, viktorm@apo.nmsu.edu wrote:
>
>>
>> We have question about Cart.3 Plate 2638: this is 'baotest157'.
>> Corresponding
>> science plan quolity (S/N)^2 > 20  should be obtained for all
>> cameras. But
>> from our current result there is no singificant signal on both 'b'
>> cameras.
>> What should we do with this plates tomorrow ?
>>
>
>
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