Subject: 3.5m Night Log 20250724
From: tsutherland@apo.nmsu.edu
Date: Fri, 25 Jul 2025 12:11:45 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, July 24, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
OU02  A.Moss            A.Moss
CU02  Y.Notsu           Y.Notsu
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
OU02  KOSMOS         22:05   00:41
CU02  ARCTIC         01:04   05:54
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
OU02/R      20:16  01:10   1.5  0.3   0    0   3.1  0.0   0    0
CU02/R      01:10  06:04    0    0    0    0   4.9  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Sutherland
Clouds made it hard for OU02 to guide, so they gave up 30 minutes early and ceded their time to CU02. We stayed open, but it took a while to get decent data due to clouds with CU02. But things eventually cleared and it was a good night.
Dataq needed a restart close to dawn.
                    ------- 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
--------------------------------------------------------------------------
22:40 kosmos   268( 1045) 107  80  16.6 15.6 16.7 15.3 15.4   --  0.90
02:03 arctic   379( 1253) 129  68  14.2 14.4 15.0 14.3 14.1   4710  1.35
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    63    47      8   261    (W)   1033   cloudy     rain
     17:00    57    51     20    20  (NNE)          cloudy     rain
     18:00    56    46     23    17  (NNE)          cloudy     rain
     19:00    57    44      4   251  (WSW)    323   cloudy     none
     20:00    61    39      6   210  (SSW)    273  ptly cldy   none
     21:00    61    40      2   270    (W)    337  ptly cldy   none
     22:00    61    38      2   329  (NNW)    320  ptly cldy   none
     23:00    61    38      6   301  (WNW)    422  ptly cldy   none
     00:00    61    38      4   260    (W)    312  ptly cldy   none
     01:00    61    40      2   291  (WNW)    389  ptly cldy   none
     02:00    58    40      9    80    (E)    306    clear     none
     03:00    57    45      2   131   (SE)    432    clear     none
     04:00    58    42      6   198  (SSW)    443    clear     none
     05:00    58    43      1   203  (SSW)    560    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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