Subject: 3.5m Night Log 20240910
From: cgray@apo.nmsu.edu
Date: Wed, 11 Sep 2024 12:20:52 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Tuesday, September 10, 2024
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
CU04  Z.Berta-Thompson  Z.Berta-Thompson
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
CU04  KOSMOS         20:10   21:48
CU04  echelle        21:52   01:08
CU04  kosmos         02:24   06:08
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
CU04/R      19:24  06:36   1.3   0    0    0   5.7  4.2   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: C.Gray
Things were supposed to be clear tonight but the weather had other ideas. We struggled with clouds most of the night. There was radar coming up the eastern slopes and around 1am the rain sensor went off. However, there was no rain on the ground so...I'm wondering if it was a false alarm. We closed for a little over an hour to let the clouds pass and then reopened. Seeing remained good and we had clear skies for the rest of the night.
Durring checkout the mirror covers needed a reset.
                    ------- 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
--------------------------------------------------------------------------
 20:25 kosmos   220( 1378)  31  53  15.8 17.0 16.7 16.6 16.4   --  0.72
 22:00 ecamera    259(  291) 219  69  15.7 15.6 15.8 15.3 15.3   ND1  0.86
 02:48 kosmos   194( 1193)  33  34  14.1 13.4 13.8 13.2 13.5   --  1.16
              ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    61    36      5   261    (W)   1151 mstly clr    none
     17:00    64    35      2   270    (W)   1197    clear     none
     18:00    64    33      5   244  (WSW)   1221 mstly clr    none
     19:00    62    34      6   224   (SW)   1171 mstly clr    none
     20:00    58    33      5   228   (SW)   1178  ptly cldy   none
     21:00    60    32      4   147  (SSE)   1139 mstly cldy   none
     22:00    60    32      6   187    (S)   1128  ptly cldy   none
     23:00    59    32     10   176    (S)   1058  ptly cldy   none
     00:00    58    32      9   188    (S)   1027 mstly clr    none
     01:00    58    32      5   182    (S)   1878  ptly cldy lt rain
     02:00    58    32      8   188    (S)   2134 mstly clr    none
     03:00    57    31      7   219   (SW)   1849 mstly clr    none
     04:00    58    30      7   233   (SW)   1519    clear     none
     05:00    57    30      5   255  (WSW)   1496 mstly clr    none
     06:00    57    30      2   234   (SW)   1340 mstly clr    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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