Subject: 3.5m Night Log 20231225
From: mcmillan@apo.nmsu.edu
Date: Tue, 26 Dec 2023 11:04:37 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Monday, December 25, 2023
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
EN01  B.Ketzeback       R.McMillan
BY03  B.Boizelle        B.Boizelle
EN01  B.Ketzeback       R.McMillan
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
EN01  ARCTIC         17:15   18:55
BY03  TSPEC          --:--   --:--
EN01  NA2GDR         --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
EN01/R      17:12  00:10    0   5.3   0    0   0.0  1.7   0    0
BY03/R      00:10  02:10    0   2.0   0    0   0.0  0.0   0    0
EN01/R      02:10  06:55    0   4.9   0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
Another clear night, this time with low humidity.  But seeing was poor at least at the start of the night, and then the wind went over the 15 mph limit necessitated by ice on the roof of the dome.  I did manage to get the twilight flats to accompany last night's throughput data (plus a little more throughput data in different seeing conditions).
                    ------- FAILURE LOG -------
              FAILURE MODE     TIME
PROG   INSTR     TI/SHU    START  FINISH  DESCRIPTION
----------------------------------------------------------------------
            ---------------- FOCUS LOG ---------------
Time  Instrument  Focus     Az  El  Temp Strc Prim  Sec  Air  filt  FWHM
--------------------------------------------------------------------------
 18:12 arctic   339(  510)  54  50  -5.6 -5.0 -4.6 -5.4 -5.6   SDSS_g  2.00
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    25    -4     14   359    (N)    120    clear     none
     17:00    23    -7      1   248  (WSW)    118    clear     none
     18:00    22    -7      3   348  (NNW)    118    clear     none
     19:00    23     0     13   328  (NNW)    113    clear     none
     20:00    22     3      8   292  (WNW)    132    clear     none
     21:00    21     6     15   281    (W)    123    clear     none
     22:00    21     9     18   298  (WNW)    146    clear     none
     23:00    20    12     13   271    (W)    166    clear     none
     00:00    20    13     19   283  (WNW)    177    clear     none
     01:00    20     8     15   306   (NW)    152    clear     none
     02:00    18     4     12   306   (NW)    134    clear     none
     03:00    18    -1     14     6    (N)    634    clear     none
     04:00    18    -9     20   345  (NNW)    155    clear     none
     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.
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