Subject: 3.5m Night Log 20250619
From: cgray@apo.nmsu.edu
Date: Fri, 20 Jun 2025 11:41:12 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, June 19, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UV02  A.Verbiscer       A.Verbiscer
JH06  K.Schlaufman      K.Schlaufman
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UV02  ARCTIC         --:--   --:--
JH06  ECHELLE        04:19   05:19
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UV02/R      20:23  02:10  5.4  0.4   0    0    0    0    0    0
JH06/R      02:10  05:47   0   2.1   0    0   0.0  1.5   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: C.Gray
The night started off with virga and thunder. It quickly cleared after sunset but then the wind shifted to the east and we had high dust almost until dawn. Around 3:30, the wind shifted to the south and the dust counts remained just below the limit and I decided to open. We were able to stay open for the rest of the night! Seeing was better than I expected at less than 2".
When I went up to do fills I found that UPS #5 was beeping and reported "power module fault, main frame module: L2, level 2 from top". I sent out an email to Bill & Co.
                    ------- 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
--------------------------------------------------------------------------
 04:23 ecamera    344(  366) 152  41  15.4 15.1 15.6 15.2 15.1   Clear  1.80
              ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    69    41     15     5    (N)   3109  ptly cldy   none
     17:00    75    42      9    38   (NE)   3419  ptly cldy   none
     18:00    70    42      6   109  (ESE)   3173  ptly cldy   none
     19:00    67    46     13   117  (ESE)   4042  ptly cldy   dust
     20:00    65    46     14    89    (E)   4712    clear     dust
     21:00    63    48     15    87    (E)   4662    clear     dust
     22:00    61    48     17    78  (ENE)   4701    clear     dust
     23:00    60    48     16    84    (E)   4952    clear     dust
     00:00    59    47     18    78  (ENE)   4698    clear     dust
     01:00    58    46     13   106  (ESE)   4216    clear     dust
     02:00    60    44      9   113  (ESE)   4037    clear     dust
     03:00    60    46     19   152  (SSE)   3861    clear     dust
     04:00    60    45     16   162  (SSE)   3635    clear     none
     05:00    61    44      7   179    (S)   3497    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