Subject: 3.5m Night Log 20250930
From: dembicky@apo.nmsu.edu
Date: Wed,  1 Oct 2025 12:48:10 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Tuesday, September 30, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
NM06  A.Smith           A.Abbas, E.Nielsen
NM03  A.Peck            A.Peck, A.Smith
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
NM06  ECHELLE        18:57   01:06
NM03  ECHELLE        01:07   06:31
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
NM06/R      18:57  01:10    0    0    0    0   0.2  6.0   0    0
NM03/R      01:10  06:49    0    0    0    0   5.6  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: J.Dembicky
My first half observers noted tonight that the ThAr counts were around 3250 last year and around 3100 counts tonight.  I know Bill was doing something with the lamps the other day, so I have included this for his information.
08:51 motion error alt 35.6 deg slewing downward while observer was slewing to their next target.
09:25 motion error alt 49.9 deg slewing downward, while observer was slewing to their next target.
Observers were taking echelle cals so no end of night IOL
No problems tonight
                    ------- 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
--------------------------------------------------------------------------
 19:13 ecamera    446(  181) -40  61  11.9 13.4 13.4 13.0 11.9   ND3  0.82
 01:09 ecamera    458(   99) -42  36  11.5 11.1 11.6 11.2 11.5   ND2  0.83
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    59    36     13   249  (WSW)    372  ptly cldy   none
     17:00    58    38      8   217   (SW)    415  ptly cldy   none
     18:00    58    36      8   240  (WSW)    413 mstly clr    none
     19:00    53    34      5   199  (SSW)    477    clear     none
     20:00    54    32      9   200  (SSW)    432    clear     none
     21:00    52    33      8   187    (S)    582    clear     none
     22:00    53    34     12   185    (S)    549    clear     none
     23:00    53    28     10   192  (SSW)    541    clear     none
     00:00    53    28     12   217   (SW)    708    clear     none
     01:00    52    28      8   202  (SSW)    670    clear     none
     02:00    52    34      8   191    (S)   1123    clear     none
     03:00    52    34     10   214   (SW)    844    clear     none
     04:00    52    34      7   219   (SW)    803    clear     none
     05:00    52    34      6   210  (SSW)    619 mstly clr    none
     06:00    52    32      5   250  (WSW)    536    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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