APACHE POINT OBSERVATORY SDSS 2.5M OBSERVING LOG Wednesday December 31, 2025 (SJD 61041) ---- Observing Team ---- Kaike Pan ---- Observing Plan ---- Wed 31 Dec 2025 61041 0.93 01:05 01:20 12:52 01:00 12:34 --- bright until 12:27 (11.4 h, w/ 0.3 h for 12 deg design), then dark ( 0.4 h) ---- Observing Summary ---- The entire night is lost to threaten clouds and rains. When close, I completed the BOSS monthly checkout task. I compared dark frames taken on 10/15/2025, 11/15/2025, 11/30/2025, and 12/31/2025, the features due to the charge transfer efficiency issue are not stable, they change from one exposure to another, no clear trend (with time) is seen, which is good. ---- Observing Log ---- Afternoon: ========== BOSS collimation checked, no adjustment made. 23:01:28 Hartmann collimate output sp1: offset: r= 0 (In Focus); b= -5.2 (Out of focus) sp1: pred. move: spAverageMove= 835 sp1: pred. resid: r= -835, b= -2.6, txt= OK, spTemp = 5.3 BOSS cal, APOGEE evening cal, fvc dark, GFA bias, dark are taken, checked. FVC loop, robots are exercised, perform well. All actors and systems are alive and working. 23:25Z: started evening ventilation. Night: ==== Delay open due to threaten clouds. 01:30Z: A big rain, snow system is approaching us. Look like that we will not be able to open soon. Start BOSS monthly checking out task. 25 biases: file=393843 - file=393867. three 900-sec dark: file=393868 - file=393870 apo_plotbias, 393866, plotfile='biasPlot2025-12-31.ps' Filename 02% 05% 10% 50% 90% 95% 98% ------------------- ------ ------ ------ ------ ------ ------ ------ sdR-b1-00393866.fit -4.6 -3.4 -2.6 -0.0 2.4 3.1 3.7 sdR-r1-00393866.fit -6.6 -5.0 -3.9 -0.2 3.4 4.4 5.4 apo_plotbias,393869,plotfile='darkPlot2025-12-31.ps' Filename 02% 05% 10% 50% 90% 95% 98% ------------------- ------ ------ ------ ------ ------ ------ ------ sdR-b1-00393869.fit -4.6 -3.4 -2.5 0.3 2.8 3.5 4.3 sdR-r1-00393869.fit -6.2 -4.6 -3.5 0.4 4.1 5.2 6.2 Five 25s flats: file=393871 - file=393875 ---- Mirror Numbers ---- PRIMARY: -------- Scale: 1.000000 MIGS TONIGHT NOMINAL Axial A: 0.1020 0.1030 Axial B: -0.0280 -0.0250 Axial C: -0.1770 -0.1740 Trans D: -0.0250 -0.0300 Lateral E: 0.3400 0.3400 Lateral F: 0.5475 0.5470 GALILS Commanded: 8450 -1050 8800 22100 -2000 -1700 Actual: 8450 -1050 8800 22100 -2000 -1700 SETMIR VALUES PrimDesOrient: 1.06 2.03 16.67 -410.97 -787.67 PrimOrient: 1.06 2.03 16.67 -410.97 -787.67 SECONDARY: ---------- Focus: 0.0000 Air temp: 0.00 Altitude: 30.0 MIGS TONIGHT NOMINAL Axial A: -7.6390 -7.6390 Axial B: -7.5340 -7.5320 Axial C: -7.5270 -7.5280 Trans D: 0.1980 0.1940 GALILS Commanded: 2249750 2248100 2243000 -1750 -1700 Actual: 2215628 2225392 2199288 -1750 -1700 SETMIR VALUES SecDesOrient: 1757.0 7.9 1.5 -39.3 35.42 SecOrient: 1756.9 7.89 1.47 -39.33 35.19 ---- Telescope Status ---- 23:25 Started ventilation N/A encl25m : open N/A encl25m : closed No interlocks bypassed Status at: 11:45 Telescope stowed at: 121.0, 30.0, 0.0 mount Instrument mounted: FPS Counterweights at: 35.1, 34.7, 35.3, 34.6 LN2 autofill systems: Connected and turned on 180L LN2 dewar scale: SP1 218.0 lbs, 21.1 psi Chiller Flow: 7.47 L/min to FPS, 2.35 L/min to GFAs, 4.9/6.0 gpm total Chiller Temp: 7.1C No chiller alarms ---- Software Used ---- STUI : 1.7.21 alerts : 2.3.0 boss : 6.0.5a1 -boss.specMec : 3.0.4 apo : 4.1.0 fliswarm : 0.6.0 jaeger : 1.11.0 kaiju : 1.4.1 coordio : 1.18.1 fps_calibrati : 2025.12.04 cherno : 1.1.0 astrometrynet : 0.93 hal : 1.4.1 hartmann : 2.0.2 hub : 5.0.1a0 mcp : 2.3.1 -mcp.plc : 35 -mcp.azFiduci : v1_152 -mcp.altFiduc : v1_152 -mcp.rotFiduc : v1_152 tcc : 1.4.0 apogee : not availble apogeecal : not availble apogeeql : v1_7_0dev STUIAdditions : FAILED Boson : 0.5.1 sdss-obstools : 3.9.3 TPM : 1.2-31-gd7eb MCP : 2.3.1 PLC : V35 Fiducials : v1_152 idlspec2d : v6_2_1 Kronos : 2.1.0a roboscheduler : 2.1.0 /dev/sdb1 2.0T 485G 1.6T 24% /home /dev/sdd1 22T 16T 5.1T 76% /data ---- Time Tracking ---- *=*=*= Observatory: APO *=*=*= MJD: 61041 Fill night time in Hours below *=*=*= Total bright time : 11.4 *=*=*= Bright time, queued observations : 0.0 *=*=*= Bright time, commissioning/engineering: 0 *=*=*= Bright time lost to weather : 11.4 *=*=*= Bright time lost to technical issues : 0 *=*=*= Total dark time : 0.4 *=*=*= Dark time, queued observations : 0.0 *=*=*= Dark time, commissioning/engineering : 0 *=*=*= Dark time lost to weather : 0.4 *=*=*= Dark time lost to technical issues : 0