Date: Mon, 12 Nov 2012 09:23:14 -0700 (MST)
From: Matt Olmstead
Subject: Re: [sdss3-25mlog 917] 2.5m obslog 20121111 (MJD 56243)
Hi Kaike,
 	After a very quick look, it appears to be the case where we are
just inside the tolerance (b2 -0.2 pixels and r2 0.2 pixels out of focus)
so passes the collimate criteria (otherwise would need to move the rotator
ring) and is just barely not making the xsigma
requirement.  I believe the xsigma threshold was set fairly tight so these
should be fine since very close to threshold.  I will look at a few more
things later today to make sure this is correct.
Thanks
Matt
On Mon, 12 Nov 2012, Kaike Pan wrote:
>
> On Nov 12, 2012, at 5:42 AM, kinemuchi@apo.nmsu.edu wrote:
>
>>
>>                       APACHE POINT OBSERVATORY SDSS 2.5M
>>
>>                                 OBSERVING LOG
>>                          Sunday November 11, 2012
>>
>>                                  (MJD 56243)
>>
>> ----  Observing Team ----
>>
>> Viktor Malanushenko
>> Karen Kinemuchi
>>
>> Elena Malanushenko (Afternoon preparation)
>>
>> ---- Observing Plan ----
>>
>> 11 Nov 2012  56243.0  0.13  01:14 12:21  21:37 08:46  BOSS  11.1 hours
>>
>>
>> ---- Observing Summary ----
>>
>> BOSS observing:
>>
>> Cart 10 (Plate 5040) -- COMPLETE!
>> Cart 11 (Plate 5046) -- COMPLETE!
>> Cart 13 (Plate 6174) -- COMPLETE!
>> Cart 15 (Plate 6279) -- COMPLETE!
>> Cart 14 (Plate 6273) -- COMPLETE!
>> Cart 16 (Plate 6377) -- COMPLETE!  (S/N)^2 was met (red > 44, blue > 20)
> Observing plan is updated accordingly.
>
>> Cart 18 (Plate 5767) -- not complete
>>
>> With the cold temperatures (-5 degrees), we did not have much trouble with
>> finding guide stars.  The first cartridge had an RA=10" and DEC=20" offset, but
>> the subsequent cartridges had smaller offsets.  The pointing model seems to be okay.
>> NOTE TO DAY STAFF:
>>
>> The scissor lift worked fine during afternoon checkout, but during the night, it
>> would not move.  We called Kaike and DanL, and the solution was to run the
>> scissor lift manually from inside the plug lab.  DanL suggested that the mirrors
>> might be slightly misaligned (we could see no obstructions to the mirror
>> pathways), so this will be fixed in the morning. NO LOSS TO BOSS SCIENCE TIME.
>
>    Thanks Karen and Viktor for the effort.
>
>>
>> MINOR HICCUPS:
>> LN2 tank near SP1 seemed to be under pressure and the weight would be "red" on
>> the TPM display.  RESOLVED: There was still a little LN in the hose, so we
>> vented and opened the hose (with the tank valve closed).  The warning went away,
>> however we suspect there may be a small leak?
>>
>> ODH alarm by the LN2 shed next to the plug lab went off around 03:35Z but as the
>> cold observer approached it, the alarm shut off by itself.  The day staff should
>> check to make sure everything is okay there please.
>>
>> The b2 flat field (file 150617) for Plate 6273 (Cart 14) had the XSIGMA
>> parameter out of spec (appears in red on the SOS webpage).  We examined the
>> previous flat field and found no major differences.  We examined the science
>> data taken directly after the flat and did not see any problems. Please see
>> more discussion in the Log and in "Problems in Detail".
>> Happened again for Cart 16 (Plate 6377) for the b2 camera.
>>
>
>     Kyle and Matt,  XSIGMA on b2 on cart 14 and 16 are red. On both plates, S/N on
> b2 are actually better than b1, and collimation shows spectrograph was in focus.
> Could you please take a look on it? Thanks,
>