APACHE POINT OBSERVATORY SDSS 2.5M OBSERVING LOG Thursday August 5, 2004 (MJD 53223) ---=== OBSERVING TEAM ===--- swing: Jurek Krzesinski night: Dan Long, Pete Newman ---=== OBSERVING PLAN ===--- More shake. Still need a pointing model, instrument on sky testing, and merged SEGUE IOP testing. ---=== OBSERVING SUMMARY ===--- We got a pointing model with 1.7 arcsecond rms. However AN and AW are significantly higher than they were ( AN=10'', AW=-26''). Do we need to reswindle? Retilt azimuth? Switched to imager but were forced to close due to weather a short time later. We got bias and flat data and ran checkBias and checkFlat. ---=== OBSERVING LOG ===--- Afternoon: ---------- Spectrographs, imager, DA - ok. No problems to report. Night: ------ When the cover was removed from the cloud camera tonight, the east leg was found to be loose. It was tightened, but the alignment may be off. 01:35Z Doors Open, Fans On. 02:10Z Enclosure Open. Got too large to correct errors on alt and az near the start of the model, so we aborted that one, corrected the axes and started a new one. The errors were probably caused by an axis init mistakenly issued during the slew to the first grid point. 04:10Z Point model data collected. Fixing the new data to the old model gives a 50 arcsecond rms and clearly shows a NW tilt. Fitting the new data for a new model gives a 2 arcsecond rms but results in significantly larger values for AN and AW: AN = 10'', AW = -26'' The check gives nearly identical values to the first model. Since the prior swindled values of AN and AW were 5 or less arcseconds, do we need to re-implement a swindle or tweak the azimuth tilt again to ensure good high elevation tracking? Details of the pointing model including plots are available at the following links. New data, all coefficients fixed from old model: http://galileo.apo.nmsu.edu/~prn/20040806pointing/fixed.gif New data, all coefficients allowed to vary: http://galileo.apo.nmsu.edu/~prn/20040806pointing/used.gif Text from tpoint session including coefficient values: http://galileo.apo.nmsu.edu/~prn/20040806pointing/tpoint.txt 05:49Z Switching to the imager 06:20Z closing due to threatening clouds to the west. While setting up to take some biases and flats in the enclosure I noticed light from the bottom of the telescope when there should be none. What I found was a little frightening. A new door (new to me anyway) covering the imager power supply lights was hanging open. I'm surprised that it cleared the lift plate when the altitude was put to 6 deg to close a little earlier. The reason it came open was the pin in the latch mechanism isn't quite lined up with the hole in the case. I had to lift the door toward the top of the imager to get it to engage. I guess when it was last closed the imager was in the doghouse and being vertical it was easy to overlook the fact the door wasn't latched properly. There needs to be a more positive engagement to prevent this happening in the future (and people need to be careful about making sure it is latched). I don't like to think of what might have happened if the door had come loose during observing. PR imager/6125 has been filed. 07:15Z Fans Off. Impressive dust event. From 500 to over 100000 in a minute. Fortunately we were already closed due to clouds. While closed and the imager was mounted, we took a bias and flat and ran checkBias and checkFlat. There were a couple of error messages. im> checkBias 4744 23 . {35 WARN: } {35 FAIL: rightRNComp } {61 WARN: } {61 FAIL: leftRNComp } im> cd flatframe23 im> checkFlat 4745 23 . -biasDir /home/long/images/frame23 {42 WARN: leftGain } {42 FAIL: } The data has been copied to phoenix:/data/photo/optics/53223 10:10Z Dust remained stubbornly way above the limit (by more than a factor of 10) and with less than 45 minutes before twilight we decided to surrender the rest of the night. To avoid any disasters due to late night loopiness, we left the imager mounted. The day staff may want to remove it should a lightning threat arise. Also the engineering camera is currently on the Lindy cart in the shed. All the slots in the cartridge bay were full and the inside manipulator would not go up (only down), so we could not put the engineering camera back in the support building. PR 6126 filed. ---=== IMAGING RUN SUMMARY ===--- Run Time Stripe Lambda Last Flavor Comments Start End Begin End Frame ------------------------------------------------------------------------- 4742 22:57Z 23:12Z 100 O 8.22 12.05 40 ignore 4743 06:09Z 06:39Z 100 O 116.58 124.02 62 bias 4744 07:30Z 07:47Z 100 O 136.87 141.13 42 bias 4745 07:49Z 08:19Z 100 O 141.75 149.21 64 calibration flatfield ---=== 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):n/a QA Procedures Done (y/n):n/a UT Exp Time flavor comment (S/N)^2 totals ========================================== b1 r1 b2 r2 ---=== TELESCOPE OFFSETS AND SCALE I ===--- Time Instrument Az Alt Rot Scale pos offset pos offset pos offset ------------------------------------------------------------------------------ ---=== TELESCOPE OFFSETS AND SCALE II ===--- ---=== DATA TAPE SUMMARY ===--- Goes: JL Stays: JL ---=== 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 23:35Z 64 44 4 224 (SW) 788 - Mostly Clear 00:11Z 65 44 4 155 (SSE) 867 - Mostly Clear 00:44Z 65 43 5 122 (ESE) 700 - Mostly Clear 01:16Z 63 42 11 138 (SE) 768 - Mostly Clear 01:48Z 61 39 16 126 (SE) 663 - Clear 02:20Z 60 37 14 126 (SE) 696 - Clear 02:53Z 60 36 14 127 (SE) 665 - Clear 03:25Z 60 34 15 143 (SE) 631 - Clear 03:57Z 62 21 9 165 (SSE) 410 - Clear 04:30Z 60 21 4 171 (S) 390 - Clear 05:02Z 61 29 5 185 (S) 385 - Clear 05:34Z 60 28 1 217 (SW) 402 - Partly Cloudy 06:07Z 60 34 5 194 (SSW) 493 - Partly Cloudy 06:39Z 59 36 7 215 (SW) 494 - Partly Cloudy 07:11Z 59 38 5 210 (SSW) 522 - Mostly Cloudy 07:44Z 59 41 2 202 (SSW) 120755 - Mostly Cloudy 08:16Z 59 42 3 195 (SSW) 86096 - Partly Cloudy 08:49Z 58 40 2 188 (S) 92877 - Mostly Clear 09:21Z 58 41 1 226 (SW) 74009 - Partly Cloudy 09:54Z 57 40 5 327 (NNW) 67230 - Partly Cloudy 10:26Z 58 42 0 329 (NNW) 62599 - Mostly Clear ---=== TELESCOPE STATUS ===--- 01:35Z Doors Open, Fans On 02:10Z Enclosure Open 06:20Z Enclosure Closed (doors open fans on) 07:15Z Doors Closed, Fans Off Stowed at 30 deg alt, imager installed. Spectro auto-fill connected. Spectro dewar 10:10Z Dewar wt 286 lb Imager dewar 10:10Z Dewar wt 215 lb No interlocks bypassed. ---=== SOFTWARE USED ===--- IOP/SOP: v3_140_0 Watcher: v2_29_0 MCP: v5_25_0 TPM: tpm_v2_42_0 AstroDa: v14_47 TCC: TCC 2.7.2 November 11 2003 sdssProcedures: v1_92 SoS: v4_10_7 hoggPT: v1_6_9 plate-mapper: v4_3_1 ---=== MIRROR NUMBERS ===--- PRIMARY: -------- Scale: 1.000000 MIGS TONIGHT NOMINAL Axial A 0.4540 0.4450 Axial B 0.6720 0.6770 Axial C 1.1060 1.0980 Trans D -9.5460 -9.5280 Lateral E 10.5918 10.6172 Lateral F 10.5791 10.6172 GALILS Commanded: 5900. -3250. 2600. 7850. 10150. 9750. Actual: 5890. -3255. 2615. 7836. 10164. 9749. SETMIR VALUES PriDesOrient: 0.00 -19.60 10.70 586.50 1069.10 PriOrient: 0.00 -19.75 10.53 586.52 1069.84 SECONDARY: ---------- Focus: 0.00 Air Temp.: 18.5 Alt.: 29.999476 MIGS TONIGHT NOMINAL Axial A 1.4980 1.5100 Axial B 1.1080 1.0950 Axial C 1.0880 1.1110 Trans D 0.0620 0.0020 GALILS Commanded: 1628606. 1548172. 1574458. -3900. -8750. Actual: 1628641. 1548187. 1574504. -3899. -8726. SETMIR VALUES SecDesOrient: 1257.00 0.00 -25.00 0.00 146.27 SecOrient: 1256.97 0.01 -25.00 0.27 146.55 ---=== PROBLEMS IN DETAIL ===---