Subject: 3.5m Night Log 20250526
From: ajt@apo.nmsu.edu
Date: Tue, 27 May 2025 11:48:43 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Monday, May 26, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UV05  C.Sarazin         M.Sun
NM08  K.Sanderson       K.Sanderson
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UV05  ARCTIC         20:25   01:01
NM08  KOSMOS         01:16   04:59
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UV05/R      20:12  01:10    0    0   0.2   0   4.8  0.0   0    0
NM08/R      01:10  05:49    0    0    0    0   4.6  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend
ARCTIC was fine at checkout and had bias levels back around 290 in regualar quad mode, but when the A-half observer tried to take a bias it failed, with the error "Set exposure time to 0 ms failed with retVal=4543058". I had to do an arctic init to get the instrument working again, and (as expected) the UL quad has dropped. We observed in LL mode and I did not attempt to recover the quad tonight.
We did not get on sky right away for flats because I was checking out ARCTIC.
We had potometric sky all night with mostly really good seeing!
                    ------- FAILURE LOG -------
              FAILURE MODE     TIME
PROG   INSTR     TI/SHU    START  FINISH  DESCRIPTION
----------------------------------------------------------------------
UV05  ARCTIC      I/S      20:12   20:25  ARCTIC bias failed and I had to do an arctic init
            ---------------- FOCUS LOG ---------------
Time  Instrument  Focus     Az  El  Temp Strc Prim  Sec  Air  filt  FWHM
--------------------------------------------------------------------------
 21:10 arctic   247( 1308)  66  70  13.1 14.1 14.5 13.6 13.4   SDSS_r  0.82
 22:14 arctic   271( 1289)  96  55  12.2 13.1 13.7 12.7 12.6   SDSS_r  1.38
 01:26 kosmos   300( 1161)  16  79  13.4 12.2 12.9 11.9 12.6   --  0.65
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    63    13     10   252  (WSW)   2653    clear     none
     17:00    65    14     20   236   (SW)   2040    clear     none
     18:00    64    14     17   245  (WSW)   1909    clear     none
     19:00    61    12     15   260    (W)   2100    clear     none
     20:00    57     7     11   246  (WSW)   2115    clear     none
     21:00    57     5     14   240  (WSW)   2774    clear     none
     22:00    55     5     13   240  (WSW)   3235    clear     none
     23:00    57     5     10   228   (SW)   2944    clear     none
     00:00    54     6     10   235   (SW)   2377    clear     none
     01:00    56     7     10   188    (S)   1999    clear     none
     02:00    56    10     10   200  (SSW)   1999    clear     none
     03:00    55     9      7   197  (SSW)   2008    clear     none
     04:00    55    10      6   238  (WSW)   1975    clear     none
     05:00    54    12      5   241  (WSW)   2146    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  ----------
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Current HUB version: v20171231_01
Current TUI version: 3.1.8