Subject: 3.5m Night Log 20250310
From: mcmillan@apo.nmsu.edu
Date: Tue, 11 Mar 2025 12:47:01 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Monday, March 10, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
EN01  B.Ketzeback       A.Townsend, R.McMillan
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
EN01  ARCTIC         20:00   02:15
EN01  Shack          02:20   03:40
EN01  NA2gdr         03:45   06:10
EN01  ECHgdr         06:20   06:30
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
EN01/W      19:16  07:10    0    0    0    0   1.0 10.9   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist:  A.Townsend, R.McMillan
ARCTIC had a mysterious change in bias level between Sunday and Monday, but aside from the quads being unbalanced it seems all right.  We took lots of throughput data and also checked that the boas level remained stable through the night.
KOSMOS IEB1 was power cycled to try to reduce motor failures, but it did not recover gracefully. Further recovery work will be needed during the day.
Shack-Hartmann recommended a significant change in collimation, but there was almost no change in pointing from the last pointing model, so the collimation must have been a reversal of some other change that occurred in between.
                    ------- 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
--------------------------------------------------------------------------
 20:30 arctic   202(  799)  21  53   2.6  4.1  4.2  3.3  3.0   SDSS_g  1.19
 21:10 arctic   378(  894) -67  31   2.8  2.0  3.6  2.6  2.7   SDSS_i  1.19
 00:07 arctic   360(  834)  19  50   2.5  1.4  2.9  2.4  2.4   SDSS_i  1.25
 03:16 shack   350( 1378)  40  69   3.3  1.8  3.3  2.7  3.1   -  0.90
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    49    -3     12   235   (SW)    486    clear     none
     17:00    47    -3     12   245  (WSW)    399    clear     none
     18:00    46    -3     10   242  (WSW)    508    clear     none
     19:00    40   -10     10   236   (SW)    654    clear     none
     20:00    37    -4     13   210  (SSW)   1076    clear     none
     21:00    37    -1     14   201  (SSW)   3302    clear     dust
     22:00    36     2     13   236   (SW)   3797    clear     dust
     23:00    37     3     11   239  (WSW)   3600    clear     dust
     00:00    37     2      8   260    (W)   3435    clear     dust
     01:00    37     1     14   266    (W)   3104    clear     none
     02:00    39     1     19   291  (WNW)   2862    clear     none
     03:00    38     1     21   297  (WNW)   2597    clear     none
     04:00    39     3     18   288  (WNW)   2572    clear     none
     05:00    39     3     17   278    (W)   2531    clear     none
     06:00    38     2     16   275    (W)   2449    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.
              ----------  TELESCOPE SOFTWARE  ----------
Current TCC version: 1.4.2
Current HUB version: v20171231_01
Current TUI version: 3.1.8