Subject: 3.5m Night Log 20130919
From: dembicky@apo.nmsu.edu
Date: Fri, 20 Sep 2013 11:35:25 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, September 19, 2013
                                                           ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START  FINISH
--------------------------------------------------------------------
M.Klaene          M.Klaene              X              02:00   05:00
   INST       SCHEDULED     WEATH     EQUIP      OBS     NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B    D    B
 ----------------------------------------------------------------
EN01/O     19:12   06:42    0   8.5   0    0   0.0  3.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: J.Dembicky
Clouds from a tropical storm passing to our SE.
I took 20min darks with DIS and Echelle, Russet was running another set of 900s separately for SPIcam tonight.
Dome dark the DIS red side (B1200/R1200 gratings) showed a small glow at the both of the bottom coreners.  There were no lights on during the exposures.
I performed some repeatability tests for DIS bay 2 using the B1200/R1200 gratings.
with calibrated gratings (probably not necessary for this test) I moved the grating centers from 4400/7300 to 3800/6800 then back to the original position (A) and checked the position of the 4471/7173 lines.  Then moved gratings to 4900/7800 and back to the original position (B) and again checked the above line positions.  Results below
     Pixel position
       4471   7173
       ----   ----
Orig   1142   1249
From A 1142   1250
From B 1141   1250
From A 1139   1250
From B 1141   1250
From A 1141   1250
From B 1141   1250
From A 1140   1250
From B 1141   1250
Pointing model using biggrid.dat, humidity spiked at the very end but I kept going since I was at star 112 of 130.  Wind also picked up and wind direction started coming out of the NE, so seeing probably went south.  Outside railing was dry yet but it looked like there might be fog just off to our east. I carefully watched the cloudcam to get the last few stars.  I really had to push the limit to get the last couple stars, but the fog was blowing overtop and not at ground level, although the humidity was really high.  There was no condenstation on the telescope truss or bottom telescope railing.
Fog closed us the rest of the night.
Wind partially blew off the cloth on SPIcam,  the exposures around 11:00 UT probably had dome lights on (about 15 mins or so).
                    ------- FAILURE LOG -------
PROG   INST   FAILURE MODE     TIME
    (SEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
----------------------------------------------------------------------
            ---------------- FOCUS LOG ---------------
Time  Instrument  Focus     Az  El  Temp Strc Prim  Sec  Air  filt  FWHM
--------------------------------------------------------------------------
 02:45 GUIDER   361(  785) -54  51  12.7 11.9 12.8 12.1 12.2   R  0.86
     Note: the wind was coming from the azimuth listed.
     The convention used is north=0 degrees, east=90 degrees.
     The dust count is particles > 1u per 0.1 cubic feet.
                          TELESCOPE STATUS
    Telescope drives operational. Current TCC version: 2.15.0
    Current TUI version: 2.1.0