Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, June 28, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
BY03  E.Hintz           G.Steed, M.Gee        
GS02  D.Gies            A.Chaturvedi          

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
BY03  TSPEC          20:24   20:55   
BY03  TSPEC          23:25   01:00
GS02  ECHELLE        01:10   05:44

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
BY03/R      20:24  01:10    0   2.5   0    0   0.0  2.3   0    0
GS02/R      01:10  05:49    0    0    0    0   0.4  4.3   0    0

note: scheduled times listed include instrument change time

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

Cary adjusted the Echelle ThAr lamp back to the proper current.  I placed a new label on the PS as well so we know what is the correct value when it is on.

We closed at 20:55 due to dust spiking.

We re-opened at 23:25

My 2nd half observers TUI stopped updating slitviewer images and downloading data.  I suggested they close TUI and re-open and log back in.  That seemed to fix the issue but they did notice that their image downloads were slow.  Maybe an ISP problem.  I wasn't noticing any laggyness on our end getting out.  Things seemed to improve after a second restart.

                    ------- 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
--------------------------------------------------------------------------
 20:31 tcamera    676( 2002) 113  76  19.3 20.8 20.7 20.5 19.2   Ks  1.07
 23:32 tcamera    353( 1513) 252  66  15.4 17.1 19.0 17.2 15.4   Ks  1.20
 00:13 tcamera    600( 1671)  84  64  14.8 15.4 16.7 15.0 14.7   Ks  1.20
 01:13 ecamera    500(  285) 202  59  14.2 14.6 15.6 14.3 14.1   clear  1.78

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    73    37     23   264    (W)   1485 mstly clr    none 
     17:00    75    36     25   255  (WSW)   1592 mstly clr    none 
     18:00    73    36     28   267    (W)   1717 mstly clr    none 
     19:00    71    36     21   267    (W)   1898 mstly clr    none 
     20:00    68    35     20   262    (W)   1922  ptly cldy   none 
     21:00    63    48     24   194  (SSW)  14106  ptly cldy   dust 
     22:00    61    48     13   180    (S)   4380  ptly cldy   dust 
     23:00    61    47     25   187    (S)   4307 mstly clr    dust 
     00:00    59    48     20   191    (S)   1885  ptly cldy   none 
     01:00    58    48     15   210  (SSW)   1925  ptly cldy   none 
     02:00    57    46     16   200  (SSW)   3573  ptly cldy   none 
     03:00    57    47     18   196  (SSW)   3102 mstly clr    none 
     04:00    56    33     19   212  (SSW)   1355 mstly clr    none 
     05:00    55    32     15   200  (SSW)   1316  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
Current TUI version: