Date: Fri, 23 Apr 2004 11:58:44 GMT From: prn@apo.nmsu.edu (Pete Newman) Subject: 2.5m obslog 20040422 (MJD 53118) APACHE POINT OBSERVATORY SDSS 2.5M OBSERVING LOG Thursday April 22, 2004 (MJD 53118) ---=== OBSERVING TEAM ===--- Swing: Howard Brewington Night: Steph Snedden Pete Newman ---=== OBSERVING PLAN ===--- Science. ---=== OBSERVING SUMMARY ===--- Day crew: please CO2-clean the primary, as we probably got dust on it tonight. We were delayed for most of the night by high dust counts. When that subsided, we tried imaging but the seeing was poor, then finished one plate (1387) and got good data on another (1414) before morning twilight. We acquired guide stars on the first plate with cleared offsets using Dan's revised spectrograph instrument data block! Well done, Dan! ---=== OBSERVING LOG ===--- Swing -------- During the afternoon checkout, I had to reboot photo 1 and photo 2 because some tapes (id3-1 and id4-2) were not being properly read. I also did a ptvmeReset. As requested, I homed D and E of M2. Spectro focus was checked and found to be within spec. Night -------- We will run using Dan's NOROTINSTXYSPECTRO spectrograph instrument data block. High dust counts and marginal wind speed before sunset delayed ventilation of the enclosure. Bruce gave us the go-ahead to double the closure dust limits if we would get imaging data. Around sunset, 01:41Z, we are fairly certain that much of the structure seen in the IRSC movies is due to dust, not moisture. In any case, we are seeing short-lived orographic clouds and the standard deviation in the IRSC data is large enough to call conditions non-photometric. We therefore did not open until either the dust drops or photometric conditions prevail, and in any case, moon-set is not until 04:54Z. 02:40Z Dust counts now > 4000, so we closed (as did the 3.5m, whose enclosure was reading > 5000). 07:55Z Dust rapidly improving to 1.8 arcsec) 09:44Z 2 1387 1.00011 -1086 678 450 266 72.4 3.8 22 290 BG38 1.4 10:59Z 8 1414 1.00011 -1086 531 300 292 70.5 2.9 23 294 BG38 1.6 ---=== WEATHER LOG ===--- Wind Time Temp F Dewp F MPH Direction Dust DIMM Sky 22:59Z 57 13 24 216 (SW) 1559 - Small clouds 23:31Z 57 10 19 258 (WSW) 1546 - " 00:04Z 56 11 14 244 (WSW) 2587 - Clear 00:36Z 54 10 26 258 (WSW) 3219 - " 01:12Z 52 10 24 233 (SW) 2824 - " 01:44Z 49 9 16 236 (SW) 3558 - " 02:15Z 49 9 22 216 (SW) 3419 - " 02:47Z 49 10 29 215 (SW) 4620 - " 03:19Z 49 10 21 227 (SW) 4005 - " 03:52Z 47 10 24 220 (SW) 3934 - " 04:24Z 47 10 19 244 (WSW) 7579 - " 04:56Z 46 10 17 267 (W) 13694 - " 05:28Z 46 9 19 255 (WSW) 24177 - " 06:01Z 44 10 18 270 (W) 22771 - " 06:33Z 43 11 16 276 (W) 14174 - " 07:05Z 42 12 11 270 (W) 6237 - " 07:35Z 41 13 17 271 (W) 4136 - " 08:05Z 41 14 17 289 (WNW) 4298 - " 08:35Z 40 15 19 295 (WNW) 2830 - Patchy clouds? 09:06Z 39 16 19 301 (WNW) 2538 - " 09:36Z 39 16 20 291 (WNW) 2704 - Patchy clouds 10:07Z 38 16 17 293 (WNW) 2708 - " 10:38Z 37 16 21 298 (WNW) 2357 - " 11:09Z 37 17 5 272 (W) 2575 - " 11:41Z 36 18 21 292 (WNW) 2558 - ---=== TELESCOPE STATUS ===--- 01:20Z Doors open, fans on 01:38Z Sunset: did not open as 1u dust counts ~3400, but we continued to cool the mirrors. 02:40Z Doos closed, fans off (high dust) 07:55Z Enclosure off, fans on. 11:28Z Enclosure on, fans off No interlocks bypassed. Status at 11:43Z: Telescope stowed at: 30 deg altitude Instrument mounted: Cartridge 8 Counterweights at: 270 Autofill systems: On 180L LN2 dewar scales: Spectro 266 lb, 23 psi Imager 227 lb, 18 psi ---=== SOFTWARE USED ===--- IOP/SOP: v3_135_0 Watcher: v2_29_0 MCP: v5_25_0 TPM: tpm_v2_41_0 AstroDa: v14_47 TCC: TCC 2.7.2 November 11 2003 sdssProcedures: v1_89 SoS: v4_10_7 hoggPT: v1_6_9 plate-mapper: v4_3_1 ---=== MIRROR NUMBERS ===--- PRIMARY: -------- Scale: 1.000000 MIGS TONIGHT NOMINAL Axial A 0.5400 0.5420 Axial B 0.6450 0.6480 Axial C 1.0940 1.0940 Trans D -8.4430 -8.4380 Lateral E 10.8712 10.8966 Lateral F 10.8458 10.8585 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.: 13.3 Alt.: 30.000148 MIGS TONIGHT NOMINAL Axial A 1.5130 1.5120 Axial B 1.1050 1.1050 Axial C 1.1150 1.1140 Trans D 0.0020 0.0040 GALILS Commanded: 1628663. 1547699. 1573873. -3900. -8750. Actual: 1628650. 1548200. 1574500. -3900. -8750. SETMIR VALUES SecDesOrient: 1257.00 0.00 -25.00 0.00 146.27 SecOrient: 1256.71 0.11 -25.18 0.15 146.49 ---=== PROBLEMS IN DETAIL ===--- We saw the following apparently spurious TPM errors in the Watcher tonight: dewar (Imager Dewar Scale Communications Fault:: 2004-04-23 02:20:22Z) ca (Channel Access Failure: TPM Down?: 2004-04-23 03:57:24Z) m2 mig (Communications Fault: 2004-04-23 07:38:19Z) The dewar scale communications fault seems to pop up very often. Perhaps it is polling too often? All other TPM errors were appropriate. --== spectro focus ==-- spectro focus was checked and found to be within spec. current coll_motor settings. sp1: A=979 B=10378 C=6577 sp2: A=3 B=-2 C=0