APACHE POINT OBSERVATORY SDSS 2.5M OBSERVING LOG Thursday August 9, 2007 (MJD 54322) ---=== OBSERVING TEAM ===--- dayShift: Howard Brewington Observers: Dmitry Bizyaev Steph Snedden Support: French Leger Russell Owen (phone) Craig Loomis (phone) ---=== OBSERVING PLAN ===--- Still shakedown. ---=== OBSERVING SUMMARY ===--- The TCC and spectro collimation problems from last night were resolved. Spectro monthly checkout is now done. The vacuum in spectro camera 4 was bad. The camera will be pumped through the night. ---=== OBSERVING LOG ===--- Afternoon: ---------- I built and installed new fiducial tables (v1_65) for alt, az, and rot. I confirmed the updates in Change Log. During the imager bias (run #6883), I noticed some low-level noise in all dewars, but dewar one (all filters) and dewar six (filters U, Z, and G) contained the most noise. With dewar six, the noise was always visible. However, dewar one only displayed the noise occasionally, and it appeared as bars. The imager bias yesterday produced the same result. And, we discovered that unlatching the T-bars solved this problem. I did this bias while French was working in the enclosure with the lights on, which could be part of the problem. Steph asked that I mention the bias-noise problem to Wendell when the engineering crew has more time. Night: ---------- During the afternoon, French called up Russell who then called Craig so we could work on the TCC problem noted in last night's log. Recall that commanded slews would accelerate, go about halfway to the destination, decelerate, stop, errors would accumulate and then the axis would abort. It turns out that the new TCC acceleration and jerk parameters were set to work optimally with the 3.5m, and those values don't work with the 2.5m. When Russell increased the accel/jerk by a factor of ten (I think that's what he said), then all our slews completed normally. We tested slews succesfully in all three axes. French then hooked up the vacuum pump to spectro camera 4, and did find that the vacuum was bad. It will need to pump all night and will be cooled back down tomorrow. By 05:47Z the vacuum was 1.5 microtorr. We then turned our attention to the sp2 collimation actuators. After physically measuring the actuator distances French could see that actuator A had been at a very different position than B and C when the the spectro mechanicals were powered back up after shutdown. We determined the negative limits (largest separation between mirror and the plate holding the gauge housings) for all three, then moved them back half that distance. We then did the spectro optical alignment and focus on sp2, and found this initial mechanical center was pretty close to the correct alignment and focus. Dmitry made a few small changes to the tilt in both X and lambda directions, but they were not large changes. Focus was also good. After all this was done, we rebooted the sp2 mechanicals so the actuator numbers should stay close to zero during this run. Spectro collimation is now done. endNight rejoiced. ---=== IMAGING RUN SUMMARY ===--- Run Time Stripe Lambda Last Flavor Comments Start End Begin End Frame ------------------------------------------------------------------------- 6883 20:26Z 23:40Z 100 O -26.25 22.37 338 ignore ---=== IMAGING RUN DETAILS ===--- ---=== SKIPPY RESULTS ===--- Run Frame nFrames stars muErr muRms nuErr nuRms rot az el --------------------------------------------------------------------------- ---=== LTMATCH RESULTS ===--- Run Field nFields alt az nGood rowMean rowSig colMean colSig rot ------------------------------------------------------------------------ ---=== SPECTROSCOPY DATA SUMMARY ===--- Summary Checked (y/n): QA Procedures Done (y/n): UT Exp Time flavor comment (S/N)^2 totals ========================================== b1 r1 b2 r2 ----- sequence 45669, plate -9999 ------- 20:31 45669 0.0 bias 20:35 45670 0.0 bias 03:19 45674 10.0 flat 03:29 45675 2.0 arc 03:46 45676 2.0 arc ----- sequence 45677, plate 2623 ------- 04:03 45677 0.0 bias 04:07 45678 0.0 bias 04:13 45679 2.0 arc 04:25 45680 2.0 arc 04:41 45681 2.0 arc 04:56 45682 3.0 arc 04:59 45683 3.0 arc 05:25 45684 3.0 arc 05:27 45685 3.0 arc ---=== TELESCOPE OFFSETS AND SCALE I ===--- Time Instrument Az Alt Rot Scale pos offset pos offset pos offset ------------------------------------------------------------------------------ ---=== TELESCOPE OFFSETS AND SCALE II ===--- ---=== FOCUS LOG ===--- setmir piston Temp Wind Time Inst scale M1 M2 Foc Az Alt (C) MPH Dir filt fwhm ------------------------------------------------------------------------------ ---=== WEATHER LOG ===--- Wind Time Temp F Dewp F MPH Direction Dust DIMM Sky 20:26Z 64 47 16 77 (ENE) 320 - cloudy 20:58Z 55 52 13 92 (E) 1269 - ' 21:34Z 54 48 20 76 (ENE) 637 - ' 22:06Z 55 45 25 72 (ENE) 214 - ' 22:37Z 53 46 25 76 (ENE) 307 - ' 23:31Z 54 43 20 45 (NE) 401 - ' 00:03Z 60 42 3 268 (W) 230 - ' 00:35Z 55 48 4 195 (SSW) 214 - ' 01:07Z 58 44 3 284 (WNW) 260 - ' 01:39Z 61 41 0 267 (W) 245 - ' 02:07Z 62 41 8 82 (E) 202 - most cloudy 03:20Z 60 41 7 222 (SW) 214 - ' 03:51Z 60 41 5 181 (S) 204 - ' 04:21Z 59 42 6 352 (NNW) 176 - ' 04:56Z 56 46 1 273 (W) 325 - ' 05:28Z 54 46 7 359 (NNW) 279 - ' 06:00Z 57 44 7 357 (NNW) 249 - ' 06:37Z 61 42 1 150 (SSE) 312 - ' 07:09Z 59 43 5 114 (ESE) 324 - ' 07:41Z 58 45 11 84 (E) 448 - ' 08:13Z 57 47 13 81 (E) 561 - ' 08:45Z 57 48 9 91 (E) 799 - ' ---=== TELESCOPE STATUS ===--- Never opened. The telescope is pointed at zenith with cartridge 8 mounted and counterweights at 225. The spectro autofill is connected, using the extenders. The telescope top end is covered with a tarp to prevent rain from dripping down on M1 while we are at zenith. ---=== SOFTWARE USED ===--- IOP/SOP: v4_37_0 Watcher: v2_36_0 MCP: v6_4_0 TPM: tpm_v3_5_0 AstroDa: v15_13_1 TCC: TCC 2.9.1 2007-06-21 sdssProcedures: v2_35 SoS: v5_1_8 plate-mapper: v4_3_1 ---=== MIRROR NUMBERS ===--- Note: Mirrors have not yet been homed and relaxed. PRIMARY: -------- Scale: 1.000000 MIGS TONIGHT NOMINAL Axial A -5.2380 -0.0050 Axial B -0.2115 0.0090 Axial C -0.0003 0.0160 Trans D 11.7450 0.0040 Lateral E 9.9695 9.9568 Lateral F 11.5189 11.5443 GALILS Commanded: 4600. -2000. 2650. -9300. -9800. -9800. Actual: 4600. -2000. 2650. -9300. -9800. -9800. SETMIR VALUES PriDesOrient: 0.00 0.00 0.00 0.00 0.00 PriOrient: 0.00 0.00 0.00 0.00 0.00 SECONDARY: ---------- Focus: 0.00 Air Temp.: 16.8 Alt.: 90.003739 MIGS TONIGHT NOMINAL Axial A 0.9614 -0.0240 Axial B 0.7704 -0.0280 Axial C 0.7052 -0.0370 Trans D 0.6081 -0.0040 GALILS Commanded: -3420752. -3909834. -3575933. 5850. 11800. Actual: -3420750. -3909800. -3575950. 5850. 11800. SETMIR VALUES SecDesOrient: -2886.00 -60.00 -140.00 -190.00 -144.30 SecOrient: -2886.00 -60.01 -140.00 -190.33 -144.43 ---=== PROBLEMS IN DETAIL ===--- -------- Collimator motor positions: sp1 Coll_motor_A -1 01P-0000000001 Coll_motor_B -7 02P-0000000007 Coll_motor_C -2 01P-0000000002 sp2 Coll_motor_A -36573 01P-0000036573 Coll_motor_B 458 02P0000000458 Coll_motor_C -586 01P-0000000586 After collimation sp1, cart 8, T=16C Coll_motor_A -1 01P-0000000001 Coll_motor_B -7 02P-0000000007 Coll_motor_C -2 01P-0000000002 sp2, cart 8, T=14C Coll_motor_A -35473 01P-0000035473 Coll_motor_B -339 02P-0000000339 Coll_motor_C -736 01P-0000000736 At this point, we rebooted the sp2 mechanicals so that the actuator numbers for this run will be closer to zero. sp2, cart 8, T=14 C Coll_motor_A 0 01P0000000000 Coll_motor_B 0 02P0000000000 Coll_motor_C 0 01P0000000000