Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, July 08, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
NM05  T.McQuaid         T.McQuaid             
GS02  D.Gies            A.Chaturvedi          

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
NM05  ECHELLE        20:23   23:43   
GS02  ECHELLE        04:20   05:50

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
NM05/R     20:23  01:10   1.5   0    0    0   3.3  0.0   0    0
GS02/R     01:10  05:54   0.0  3.1   0    0   0.0  1.6   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: J.Dembicky

I know the ARCTIC LL Quad is having issues, especially noise and the warmer temps in the dome.  Tonight the quad was near saturation across the whole LL quad.  Counts in the LL quad were ~65300 cts vs. ~270 cts in the other three quads.  Not sure this is actual new behavior or not.  It did seem uniform.  The past few nights it was not saturated during checkout but on UT260703 it was nearly saturated, so maybe this is normal (bad) behavior.

I closed at 23:45 due to a storm to our N/NW that was getting a little too uncomfortably close.

We re-opened at 04:20

No telescope issues 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
--------------------------------------------------------------------------
 20:35 ecamera    610(  761)  73  41  19.4 21.9 21.3 22.8 19.8   ND3  1.19
 21:55 ecamera    716(  690)  54  52  18.0 18.5 19.1 18.0 17.9   ND2  1.30
 04:26 ecamera    516(  353) -69  81  16.8 15.9 16.3 15.8 16.1   clear  0.95

               ------------- WEATHER LOG ----------------

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------	
     16:00    73    41      8   216   (SW)   1390  ptly cldy   none 
     17:00    72    41     12   185    (S)   1395  ptly cldy   none 
     18:00    75    40      9   262    (W)   1439  ptly cldy   none 
     19:00    72    40      9   244  (WSW)   1403  ptly cldy   none 
     20:00    69    41      2   191    (S)   1301 mstly clr    none 
     21:00    66    38     16   146   (SE)    862  ptly cldy   none 
     22:00    64    35     18   144   (SE)    817  ptly cldy   none 
     23:00    63    35     12   147  (SSE)    762  ptly cldy   none 
     00:00    63    36      1   149  (SSE)    761 mstly cldy   none 
     01:00    63    38     10    15  (NNE)    992   cloudy     none 
     02:00    60    41     11    82    (E)   1123   cloudy     none 
     03:00    62    38      4   186    (S)   1050   cloudy     none 
     04:00    63    37      5   210  (SSW)    838  ptly cldy   none 
     05:00    62    39      8   185    (S)    762  ptly cldy   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
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