Subject: 3.5m Night Log 20250823
From: tsutherland@apo.nmsu.edu
Date: Sun, 24 Aug 2025 11:09:55 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, August 23, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UV01  A.Verbiscer       A.Verbiscer
GS01  S.Lepine          Z.Way
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UV01  ARCTIC         19:47   01:05
GS01  ECHELLE        01:10   02:25
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UV01/R      19:47  01:10    0    0    0    0   5.0  0.3   0    0
GS01/R      01:10  06:24   4.0   0    0    0   1.2  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Sutherland
We had a nice clear A-half.
As soon as B-half hit, one singular cloud decided to come in and just sit over us, of course blocking all science targets. We gave up trying to see through the cloud at 2:20am and I closed up. We called it a night at 4:45am.
No telescope or instrument problems.
                    ------- 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
--------------------------------------------------------------------------
 20:43 arctic   591( 1508)   1  34  14.3 14.7 15.6 14.3 14.0   SDSS_r  1.55
 21:22 arctic   505( 1387) -10  33  13.9 14.0 14.9 13.8 13.8   SDSS_r  1.46
 01:16 ecamera    474(  129)   3  63  12.2 11.8 12.5 11.9 11.9   clear  0.88
            ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    64    40      9    77  (ENE)    904  ptly cldy   none
     17:00    64    41     16    80    (E)    885  ptly cldy   none
     18:00    63    43     20    78  (ENE)    987  ptly cldy   none
     19:00    61    44     14    89    (E)   1023 mstly clr    none
     20:00    59    45     16    90    (E)   1039    clear     none
     21:00    58    45     18    77  (ENE)   1024    clear     none
     22:00    57    43     19    82    (E)    937    clear     none
     23:00    56    40     17    89    (E)    843    clear     none
     00:00    54    40     17    85    (E)    805    clear     none
     01:00    54    40     19    81    (E)    815 mstly clr    none
     02:00    54    41      8    82    (E)    971 mstly cldy   none
     03:00    54    41      1   211  (SSW)    869   cloudy     none
     04:00    54    41      1    77  (ENE)    989   cloudy     none
     05:00    53    42      4   120  (ESE)    972   cloudy     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