Subject: 3.5m Night Log 20250104
From: ajt@apo.nmsu.edu
Date: Sun,  5 Jan 2025 13:14:50 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, January 04, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
WY02  M.Moe             M.Moe
BY05  S.Bahr            S.Bahr
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
WY02  KOSMOS         17:29   20:20
WY02  KOSMOS         23:27   00:07
BY05  KOSMOS         00:08   05:13
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
WY02/R      17:20  00:10   1.0  2.1   0    0   0.7  3.0   0    0
BY05/R      00:10  06:58    0    0    0    0   6.8  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend
Wind, dust up to about 15000 cts, annoying clouds for a little over half the night. We closed for a dust event for about 3 hours during A-half. Abysmal seeing pretty much all night long.
At checkout, restarted gcam nubs.
The KOSMOS disperser wheel got stuck around 19:00 when I moved it to empty to refocus, but it only happened the one time. We were not changing dispersers often tonight.
The kcam shutter started getting stuck for single exposures every once in a while once we got down to -2.6C, but was never a significant problem.
Closed up a little early for cals.
                    ------- 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
--------------------------------------------------------------------------
 17:53 kosmos   300(  897) -19  53   5.7  6.2  6.8  6.1  5.7   --  1.98
 19:09 kosmos   300(  842) -71  35   4.8  4.7  5.5  4.8  4.8   --  3.50
 00:20 kosmos   150(  454) 135  42  -1.8 -0.2  1.0 -0.6 -1.5   --  4.00
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    46     7     20   267    (W)   2655 mstly cldy   none
     17:00    43     6     26   266    (W)   2348  ptly cldy   none
     18:00    43     5     16   249  (WSW)   2078  ptly cldy   none
     19:00    41     6     18   249  (WSW)   2705  ptly cldy   none
     20:00    40     2     18   267    (W)   3442  ptly cldy   dust
     21:00    39     1     22   268    (W)   5912  ptly cldy   dust
     22:00    39    -1     22   266    (W)  14279  ptly cldy   dust
     23:00    35    -1     17   287  (WNW)   7771  ptly cldy   dust
     00:00    30     3      8     2    (N)   1849  ptly cldy   none
     01:00    28    -4     24   355    (N)    849  ptly cldy   none
     02:00    28    -8      9   340  (NNW)    452    clear     none
     03:00    27   -10     25    37   (NE)    280    clear     none
     04:00    27   -10     12     9    (N)    320    clear     none
     05:00    28   -13     20   335  (NNW)    233    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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