Subject: 3.5m Night Log 20200716
From: cgray@apo.nmsu.edu
Date: Fri, 17 Jul 2020 11:39:53 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, July 16, 2020
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UW09  O.Fraser          O.Fraser and class
CU04  A.Kowalski        G.Stefansson
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW09  Arctic         20:20   23:21
CU04  ARCTIC         --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW09/R      20:20  01:10   1.8   0    0    0   3.0  0.0   0    0
CU04/R      01:10  05:59   2.1  2.8   0    0    0    0    0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: C.Gray
During checkout DIS red needed a restart again. However, we didn't experience any tertiary issues!Yay!
The weather started out mostly clear and we had beautiful sub-arcsecond seeing. The UW09 class had a BALL taking cool images with ARCTIC. They were able to manage all their sky flats and still see the comet in a bunch of different filters! But it's all fun and games until the dust arrives. Which it did shortly before midnight and ruined everything, forcing us to close and we were not able to reopen.
                    ------- 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
--------------------------------------------------------------------------
 20:57 arctic   803( 1689)  38  69  18.6 19.9 20.6 19.2 18.8   sdss-g  1.09
 21:31 arctic   693( 1553) -160  65  18.5 19.4 20.2 18.6 18.5   sdss-r  0.88
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    71    38      4    93    (E)   1941  ptly cldy   none
     17:00    75    37      8   193  (SSW)   2761  ptly cldy   none
     18:00    72    34     13   155  (SSE)   3677 mstly clr    none
     19:00    70    32      9   167  (SSE)   4277 mstly clr    none
     20:00    67    34     12   153  (SSE)   4310 mstly clr    none
     21:00    66    31     18   136   (SE)   3131    clear     none
     22:00    66    31     17   137   (SE)   3435    clear     none
     23:00    64    35     20   121  (ESE)   5767    clear     dust
     00:00    64    36     21   136   (SE)   6612    clear     dust
     01:00    63    33     16   133   (SE)   7339  ptly cldy   dust
     02:00    61    36      4   253  (WSW)   5697  ptly cldy   dust
     03:00    61    42     18   157  (SSE)   7627    clear     dust
     04:00    60    34     20   153  (SSE)   8074 mstly clr    dust
     05:00    59    33     17   144   (SE)   8628 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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