Subject: Re: [sdss3-25mlog 1782] 2.5m obslog 20140603 (MJD 56812)
From: "John K. Parejko"
Date: Wed, 4 Jun 2014 16:28:27 -0400
Observers,
If this happens again through the month of June (i.e., if the cold =
observer sees the lamps not behave correctly), please try to stop the =
gotoGangChange command and redo it, to try to reduce the likelihood of =
messing up APOGEE's post cal data.
The SDSS-IV version of SOP has a specific "dome flat" command, separate =
from gotoGangChange. I'm considering installing this SOP version during =
the coming engineering, as it has a number of useful new features like =
this. Though I am worried about other new "features" that might appear.
John
On 4Jun 2014, at 07:43, pgaulme@apo.nmsu.edu wrote:
> We first closed the petals from the MCP (in STUI) then moved to gang =
change.
> The dome flat was taken, but something odd happened with the lamps.
> Three lamps lighted on immediately, as usual, but the fourth one =
lighted on=20
> later and lasted more than it ought to (6-8 sec). It results that the =
dome flat=20
> was overexposed: from "list_ap" "% flux =3D 227".
--
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John Parejko
john.parejko@yale.edu
http://www.astro.yale.edu/~jp727/
203 432-9759
JWG 465
Department of Physics
Yale University
New Haven, CT
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