APACHE POINT OBSERVATORY SDSS 2.5M OBSERVING LOG Tuesday December 23, 2003 (MJD 52997) ---=== OBSERVING TEAM ===--- Swing: Howard Brewington (swing) Night: Jurek Krzesinski, Pete Newman ---=== OBSERVING PLAN ===--- Science. ---=== OBSERVING SUMMARY ===--- Two possibly useful exposures on the Orion program plate 1638, but otherwise a night lost to clouds. Possible new noise from the northwest enclosure motor. ---=== OBSERVING LOG ===--- Afternoon Checkout: ------------------- Spectro focus was checked and found to be within spec; see problems section for numbers. I (Howard) reset the nominal values for the mirror stats in logTool after homing both mirrors, but I'm not sure Trans D is working. Jon Brinkmamm was notified. I'll try checking the Trans D number at a different altitude tomorrow to see if it changes. [Night shift noted that the TPM shows M1 Transverse D reading about -8.44, so maybe this healed itself?] Night: ------ Increasing cirrus from the west. We open to try spectroscopy. Guide stars acquired on gotoField unless mentioned. On closing at the end of the night, we heard a new squeak from the northwest enclosure motor - see problems section for more details. Observing sequence: 00:28Z Plate 1468, cartridge 3. FStar program requiring S/N>30 in both blue and red. FK5 found easily during twilight. No useful photons obtained as the cloud cover steadily thickened. We waited on clouds until we got at least a big (sucker?) hole, then: 06:15Z Plate 1638, cartridge 5. Orion program requiring (S/N)^2 >= 15 in R (this plate is in Taurus). FK5 found at (12, -6) arcsec from cleared offsets at altitude 70deg. The first 1500s exposure on the target, largely in a hole in the clouds, produced (S/N)^2 >= 2.8, but the subsequent +offset sky exposure had quite variable clouds. We hope these conditions provide useful data. By the end of the +offset exposure, we lost guide stars to clouds again as the design time for the plate passed. We did not gather any more photons and gave up about 11:30Z. endNight rejoiced. We cancelled the FedEx pickup for 2003 Dec 24. ---=== IMAGING RUN SUMMARY ===--- Run Time Stripe Lambda Last Flavor Comments Start End Begin End Frame ------------------------------------------------------------------------- 4341 21:27Z 21:52Z 100 O 122.97 129.27 55 ignore doghouse bias ---=== 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): y QA Procedures Done (y/n): n UT Exp Time flavor comment (S/N)^2 totals ========================================== b1 r1 b2 r2 ----- sequence 24173, plate -9999 ------- 21:22 24173 0.0 bias ----- sequence 24174, plate -9999 ------- 23:06 24174 0.0 bias ----- sequence 24175, plate 1359 ------- 23:11 24175 10.0 flat 23:13 24176 2.0 arc 23:17 24177 2.1 arc 23:19 24178 2.1 arc ----- sequence 24179, plate 1468 ------- All useless 01:08 24179 10.0 flat 01:10 24180 2.0 arc 01:50 24181 1800.1 target 02:23 24182 1800.1 target 02:57 24183 1800.1 target ----- sequence 24184, plate 1638 ------- 06:29 24184 10.0 flat 06:32 24185 2.0 arc 07:04 24186 1500.1 target On target 07:36 24187 1500.1 target +ve offset on sky ---=== TELESCOPE OFFSETS AND SCALE I ===--- Time Instrument Az Alt Rot Scale pos offset pos offset pos offset ------------------------------------------------------------------------------ 02:18Z 3 1468 254.53 -0.0401 76.47 0.0012 83.47 0.0491 0.999840 06:38Z 5 1638 279.31 0.0089 71.37 0.0033 109.91 0.0013 1.000100 ---=== TELESCOPE OFFSETS AND SCALE II ===--- ---=== DATA TAPE SUMMARY ===--- Goes: JL7125 Stays: JL7126 ---=== FOCUS LOG ===--- setmir piston Temp Wind Time Inst scale M1 M2 Foc Az Alt (C) MPH Dir filt fwhm ------------------------------------------------------------------------------ 02:18Z 3 1468 0.99984 1579 2580 150 255 76.5 1.7 7 162 BG38 1.8 06:38Z 5 1638 1.00010 -988 461 150 279 71.4 1.6 8 180 BG38 1.6 ---=== WEATHER LOG ===--- Wind Time Temp F Dewp F MPH Direction Dust DIMM Sky 21:15Z 35 18 8 258 (WSW) 93 - Partly cloudy 21:48Z 35 18 5 226 (SW) 105 - " 22:20Z 38 19 4 228 (SW) 107 - " 22:52Z 36 18 0 202 (SSW) 137 - " 23:23Z 38 17 1 97 (E) 100 - " 23:57Z 37 17 2 113 (ESE) 105 - " 00:40Z 36 4 3 155 (SSE) 0 - " 01:11Z 36 2 2 121 (ESE) 173 - " 01:42Z 35 0 3 175 (S) 171 - " 02:12Z 35 -1 5 175 (S) 151 - " 02:45Z 35 -9 8 179 (S) 151 - " 03:17Z 36 -10 7 150 (SSE) 122 - " 03:50Z 37 -10 9 179 (S) 128 - " 04:22Z 36 -10 6 184 (S) 307 - " 06:06Z 34 -11 8 180 (S) 154 - " 06:37Z 34 -12 11 184 (S) 60 - " 07:07Z 36 -11 12 185 (S) 189 - " 07:38Z 37 -11 10 180 (S) 170 - " 08:10Z 36 -11 13 212 (SSW) 81 - " 08:42Z 34 -12 8 176 (S) 43 - " 09:15Z 38 -8 12 175 (S) 111 - " 09:47Z 37 -10 7 183 (S) 199 - " 10:19Z 35 -11 10 178 (S) 75 - " 10:51Z 33 -13 9 179 (S) 66 - " 11:24Z 32 -14 11 179 (S) 70 - " 11:57Z 31 -15 14 184 (S) 56 - " ---=== TELESCOPE STATUS ===--- 23:50Z Door opened, fans on, louvres opened. (Ventillation delayed as ambient temperature higher than the mirror temperatures.) 23:55Z Enclosure off. 11:45Z Enclosure on, shut down. No interlocks bypassed. Status at 11:56Z: Telescope stowed at: 30 deg altitude Instrument mounted: Cartridge 5 Counterweights at: 270 Autofill systems: On 180L LN2 dewar scales: Spectro 64 lb, 26 psi (just filled) Imager 188 lb, 15 psi We left a replacement 180L dewar next to the spectrographs, where the current dewar has one more fill in it and hence should last until Howard returns later today. ---=== SOFTWARE USED ===--- IOP/SOP: v3_124_0 Watcher: v2_24_0 MCP: v5_23_0 TPM: tpm_v2_36_0 AstroDa: v14_47 TCC: TCC 2.7.1 July 22 2003 sdssProcedures: v1_81 SoS: v4_10_7 hoggPT: v1_6_9 plate-mapper: v4_3_1 ---=== MIRROR NUMBERS ===--- PRIMARY: -------- Scale: 1.000000 MIGS TONIGHT NOMINAL Axial A 0.5420 0.5420 Axial B 0.6390 0.6390 Axial C 1.0900 1.0900 Trans D -8.4610 -8.4610 Lateral E 10.8966 10.8966 Lateral F 10.8712 10.8712 GALILS Commanded: 4600. -2850. 850. -9250. 18400. 17850. Actual: 4600. -2850. 850. -9250. 18400. 17850. SETMIR VALUES PriDesOrient: 0.00 0.00 15.20 829.90 1.60 PriOrient: 0.00 0.00 14.91 830.49 3.19 SECONDARY: ---------- Focus: 0.00 Air Temp.: 2.8 Alt.: 30.333625 MIGS TONIGHT NOMINAL Axial A 1.5160 1.5160 Axial B 1.1180 1.1180 Axial C 1.1210 1.1210 Trans D -0.0050 -0.0050 (we're not sure if the Trans D number is correct) GALILS Commanded: 1628644. 1548197. 1574521. -3900. -8750. Actual: 1628650. 1548200. 1574500. -3900. -8750. SETMIR VALUES SecDesOrient: 1257.00 0.00 -25.00 0.00 146.27 SecOrient: 1257.01 0.00 -25.00 0.27 146.56 ---=== PROBLEMS IN DETAIL ===--- Problem #1 - Noise from northwest enclosure motor -------------------------------------------------- While driving the enclosure towards the west on closing at 04:40Z, Pete thought the NW enclousre motor sounded "different" when running on Fast, though normal when running on Slow. On Fast, it had a distinct (but not loud) high-pitch squeak repeating with a period of about once per shaft revolution (i.e. the end of the shaft that can be seen on the south side of the gearbox case). Not very loud and not apparently hindering motion, but perhaps in need of lubrication? Ambient temperature at the time was about 0 C. Note: TPM errors seen repeatedly tonight: tmicro (Disconnected Sensor in M2B3:: 2003-12-24 11:26:41Z) m2 temp (Excessive Front-Back Temperature Differential:Excessive Front-Back Temperature Differential:Excessive Front-Back Temperature Differential:Excessive Front-Back Temperature Differential:Excessive Front-Back Temperature Differential: 2003-12-24 08:06:37Z ) m2 mig (Communications Fault: 2003-12-24 11:34:42Z) ---=== SPECTROGRAPH FOCUS POSITIONS ===--- Spectro focus was checked and found to be within spec. ambT=2 sp1: A= 8293 B= 9362 C= 8290 sp2: A= -8119 B= -7929 C= -6930