Subject: 2.5m obslog 20210805 (SJD 59432) From: kgrabowski@apo.nmsu.edu Date: Fri, 6 Aug 2021 11:42:44 +0000 (UTC) APACHE POINT OBSERVATORY SDSS 2.5M OBSERVING LOG Thursday August 05, 2021 (SJD 59432) ---- Observing Team ---- Dan Oravetz Katie Grabowski Kaike Pan (remote) Audrey Oravetz (remote) Steve Smee Robert Barkhouser Aidan Gray ---- Observing Plan ---- Optical collimation and FSC work ---- Observing Summary ---- Optically collimated and put tilts and translations into file. Collected donuts +/500um out of focus at +/1 degree in RA and Dec Image numbers: [106,107], [122,123],[126,127],[137,138] At optimal secondary focus following collimation, FSC sees 0.82" on axis, 1.09" at 1 degree off axis, and 1.1" at 1.5 degrees off-axis ~18k dust counts ---- Observing Log ---- ================== Home/Relax Mirrors ================== ------- Primary ------- desOrient=0.00,35.00,12.00,0.00,0.00,0.00 desEncMount=8146.50,-632.13,8685.81,19066.40,9007.10,9047.39 home E,F: "position error", "999999999, 999999999, 999999999, 999999999, 000000000, 000000000" home D: "position error", "999999999, 999999999, 999999999, 000000000, 999999999, 999999999" home A,B,C: "position error", "000000000, 000000000, 000000000, 999999999, 999999999, 999999999" move 0.00,35.00,12.00,0.00,0.00 Completed the 'relax' process. --------- Secondary --------- home D: “position error", "999999999, 999999999, 999999999, 000000000, 999999999" home E: “position error", "999999999, 999999999, 999999999, 999999999, 000000000" home A,B,C: "position error", "-000000083, -000000045, 000000138, 999999999, 999999999" Re-enabled the TCC Collimate routine and verified that the Secondary orientation and galil values returned to the pre-homing positions. ======== FSC Work ======== 03:16:59 encl25m : open; 03:30Z- checking focus with FSC. Checking adjustment of camera deck prior to optical collimation. 3:53Z- The best focus was 366, T= 13.6C, calculated FWHM=15 -> 1" seeing Adjusted camera deck, took another focus sweep. Moving on to optical collimation. 6:53-best focus is 141, FWHM= 12, 0.9" seeing and T=13.9 C, clear sky image 85, focus=541, exp=5 sec image 86, focus=641, exp=8 sec image 87, focus=641, exp=12 sec image 88, focus=-359, exp=12 sec image 89, f=141 best focus image 90, f=641 with previous xtilt 35 image 91, f=-359 setmir to 0,40,12,0,0 92 and 93 both have focus=641 This looks better than previous tilts Focus sweep off axis 1 degree 94 f=641, FWHM=19 95 f=691, FWHM=28 96 f=591, FWHM=19 97 f=566, FWHM=18.2 Set z-stage to where best focus distance should be for the focal plane at 1 degree off-axis in RA Move secondary focus back to 141. image 101 FWHM of 17.7, exp=10sec, 1.3" decreasing exp time M2 focus at 166 102 FWHM=17.6,exp=7sec M2 focus at 116 103 FWHM=16.8, ~1.26" Setmir=0,40,12,0,0 ==================== 104 FWHM=19.3, ~1.5" 106 f=616 (no change in focus for 105) 107 f=-384 Moving 1 degree off-axis in Declination direction, move theta 90 degrees 119 f=116,exp=1sec 120 f=616 121 f=-384 set mir tilt x=40 122 f=-384 123 f=616 Moving telescope to -1 degree off axis in RA, z-stage to 180 degrees 124 f=616 set mir tilt x=40 126 f=616 127 f=-384 Moving telescope to -1 degree off-axis in Dec, z-stage to 270 degrees set mir tilt x=40 Set focus=116 and looked the 4 offset positions At -1 in Dec, 136 f=116 137 f=616 138 f=-384 On axis, new tilts and translations in primary orientation, z-stage back to nominal move 0,-31.23,-9.35, -511.08,1708 Check donuts and optimal focus 140 f=141 141 f=616 142 f=116, FWHM=16.5, ~1.24" 143 f=91, FWHM=18.8, ~1.41" 144 f=141, FWHM=15.2, ~1.14" 145 f=191, FWHM=14.2, ~1.07" 146 f=241, FWHM=17.9, ~1.34" 147 f=200, FWHM=15.3, ~1.15" 148 f=175, FWHM=10.9, ~0.82"(best focus) 149 f=170, FWHM=11.8, ~0.89" RA+1 degree to check optimal focus off-axis 150 f=170 FWHM=14.5, 1.09" Focus loop by adjusting the z-stage, set secondary back to f=175 Optimal focus z=92 microns below nominal RA+1.5 degrees Focus loop Optical focus FWHM=14.6, 1.1" FSC remained on the telescope for continued work. 11:35:59 encl25m : closed; ---- Mirror Numbers ---- Took a set of mirror numbers even though the nominals haven't yet been saved because we still have to complete optical collimation. Note that the Xtilt and Ytilt values from the other night that worked reasonably well are currently in place for M1. PRIMARY: -------- Scale: 1.000000 MIGS TONIGHT NOMINAL Axial A: -5.0650 -4.9240 Axial B: -0.0160 -4.6800 Axial C: 0.1400 -5.7660 Trans D: 0.0256 -0.0009 Lateral E: 0.3545 0.3745 Lateral F: 0.5535 0.5745 GALILS Commanded: 8150 -650 8700 19050 9000 9050 Actual: 8150 -650 8700 19050 9000 9050 SETMIR VALUES PrimDesOrient: 0.0 35.0 12.0 0.0 0.0 PrimOrient: 0.0 34.95 12.28 -0.42 -1.11 SECONDARY: ---------- Focus: 0.0000 Air temp: 15.39 Altitude: 29.999996178438877 MIGS TONIGHT NOMINAL Axial A: -9.4590 -9.4480 Axial B: -9.4690 -9.4120 Axial C: -9.5010 -9.5050 Trans D: 0.0870 0.0390 GALILS Commanded: 4632250 4626350 4648200 -50 -3450 Actual: 4607212 4607269 4607193 -50 -3450 SETMIR VALUES SecDesOrient: 3657.0 0.0 0.0 0.0 42.22 SecOrient: 3656.99 0.03 0.01 0.01 42.67 ---- Telescope Status ---- 01:00Z Started ventilation 03:16Z encl25m : open 11:35Z encl25m : closed No interlocks bypassed Status at: Telescope stowed at: 121.0, 30.0, 0.0 mount Instrument mounted: cartridge = FSC Counterweights at: 514 514 512 514