APACHE POINT OBSERVATORY SDSS 2.5M OBSERVING LOG Monday November 11, 2002 (MJD 52590) ---=== OBSERVING TEAM ===--- Support: Craig Loomis, Jon Brinkman (yes, we started with support!) Swing: Dan Long Night: Steph Snedden, Pete Newman ---=== OBSERVING PLAN ===--- Science. ---=== OBSERVING SUMMARY ===--- Limited early on by moonlight and all night by bad seeing, then closed early by high humidity. Two plates (675, 1069) finished when summed with data from other nights and another, and useful data on several more (896, 1063, 1093) although several exposures did not make it above (S/N)^2=2 for one or more cameras, largely due to the seeing. We decided to declare plate 1143 done in retrospect as we found exposures that had not been added into the plate-mapper database. ---=== OBSERVING LOG ===--- During pre-flight checks, the first azimuth fiducial crossing produced an error of > 9000 counts. Earlier, cartridge 1 had been mounted by the engineering crew to test its latches. Is this an instance of a fiducial error going to or from the instrument change position? We also found ice in the handle for the cartridge manipulator and on thefsquare-section flexible conduit that leads to it. Almost clear sky horizon to horizon at sunset, but moonlight dictates that we start with spectroscopy, and seeing proved poor in any case in the NNE wind. See problems section #1 for comments on guide fiber dirt and focus. We checked sdsshost:/var/adm/SYSLOG for SCSI error messages after endNight completed and found none (following the diagnosis by Craig and Jon of the bad tapes discovered by Jen A. We ran at temperatures around -3C tonight without major problems. Observing sequence: 00:35Z Plate 675, cartridge 6. Done in one exposure, but we don't have another plate we can observe at a decent lunar separation so we banged more photons into this plate. 02:31Z Plate 1093, cartridge 3. Not done in 5 exposures of which 2 were no good due to poor seeing. "Merged" program plate with target of (S/N)^2 >= 15. Needed an FK5 star to find the field. We got three exposures with acceptable S/N before the seeing degraded too far (>>3 arcsec, confirmed by bad seeing reported by the 3.5m observer). Reached the end of the design time for the plate and moved on. 05:34Z Plate 1069, cartridge 8. Done in one long exposure when added to previous observations. Seeing highly variable. 06:42Z Plate 1063, cartridge 2. Not done in three long exposures of which two were good S/N. Seeing off the scale at first (>4 arcsec) ruined the other exposure. 09:25Z Plate 896, cartridge 9. Not done in one good long exposure and another made useless by poor seeing. FK5 star needed to center the field. A third exposure was aborted when we had to close because of high humidity. ---=== IMAGING RUN SUMMARY ===--- Run Time Stripe Lambda Last Flavor Comments Start End Begin End Frame ------------------------------------------------------------------------- 3476 22:47Z 22:54Z 100 O 101.85 103.61 26 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 ===--- UT Exp Time flavor comment (S/N)^2 totals ========================================== b1 r1 b2 r2 ----- sequence 16931, plate 675 ------- 9.0 10.7 10.4 9.7 DONE 01:18 16931 10.0 flat 01:20 16932 2.0 arc 01:48 16933 1200.1 target 02:18 16934 1200.1 target 02:24 16935 10.0 flat 02:26 16936 2.0 arc ----- sequence 16937, plate 1093 ------- 14.5 12.9 12.2 7.7 02:43 16937 10.0 flat 02:46 16938 2.0 arc 03:14 16939 1200.1 target 03:43 16940 1500.1 target 04:11 16941 1500.1 target 04:45 16942 1800.1 target 05:19 16943 1800.1 target 05:24 16944 10.0 flat 05:26 16945 2.0 arc ----- sequence 16946, plate 1069 ------- 5.5 4.4 4.3 3.8 DONE 05:51 16946 10.0 flat 05:54 16947 2.0 arc 06:23 16948 1500.1 target ----- sequence 16949, plate 1063 ------- 13.0 7.5 11.6 4.4 06:55 16949 10.0 flat 06:57 16950 2.0 arc 07:33 16951 1500.1 target 08:41 16952 1500.2 target 09:14 16953 1800.2 target 09:17 16954 10.0 flat 09:20 16955 2.0 arc ----- sequence 16956, plate 896 ------- 10.1 2.1 9.7 4.9 09:39 16956 10.0 flat 09:42 16957 2.0 arc 10:19 16958 1800.2 target 10:53 16959 1800.2 target ---=== TELESCOPE OFFSETS AND SCALE I ===--- Time Instrument Az Alt Rot Scale pos offset pos offset pos offset ------------------------------------------------------------------------------ 01:58Z 6 675 11.67 0.0000 56.69 0.0000 189.70 0.0000 0.999960 03:16Z 3 1093 1.70 0.0043 57.24 -0.0018 181.36 0.0087 0.999910 05:59Z 8 1069 12.54 0.0026 56.57 -0.0024 190.45 0.0029 0.999890 07:39Z 2 1063 -12.40 0.0010 56.63 -0.0013 169.54 0.0032 0.999840 10:02Z 9 896 120.54 -0.0060 60.56 -0.0034 -81.69 -0.0062 1.000180 ---=== TELESCOPE OFFSETS AND SCALE II ===--- ---=== DATA TAPE SUMMARY ===--- Goes: JL5718 Stays: JL5719 ---=== FOCUS LOG ===--- setmir piston Temp Wind Time Inst scale M1 M2 Foc Az Alt (C) MPH Dir filt fwhm ------------------------------------------------------------------------------ 01:58Z 6 675 0.99996 394 1563 75 12 56.7 -0.5 23 21 BG38 2.2 03:16Z 3 1093 0.99991 888 1945 50 2 57.2 -0.7 24 30 BG38 2.7+ 05:59Z 8 1069 0.99989 1085 2035 -25 13 56.6 -1.6 14 69 BG38 2.7+ 07:39Z 2 1063 0.99984 1579 2419 -50 -12 56.6 -2.3 18 65 BG38 2.5+ 10:02Z 9 896 1.00018 -1776 -320 0 121 60.6 -3.8 23 70 BG38 3.0+- ---=== WEATHER LOG ===--- Wind Time Temp F Dewp F MPH Direction Dust DIMM Sky 23:41Z 32 18 7 317 (NW) 128 - Clear 00:12Z 31 18 9 8 (N) 119 - " 00:42Z 31 18 11 9 (N) 129 - " 01:14Z 30 17 12 2 (N) 107 - " 01:44Z 31 17 13 7 (N) 101 - " 02:14Z 31 16 13 355 (NNW) 77 - " 02:47Z 30 15 17 20 (NNE) 91 - " 03:17Z 30 14 18 1 (N) 59 - " 03:47Z 30 14 15 36 (NE) 59 - " 04:17Z 30 14 12 12 (NNE) 56 - " 04:48Z 30 11 30 28 (NNE) 54 - " 05:18Z 30 5 19 41 (NE) 28 - " 05:50Z 28 14 21 61 (ENE) 45 - " 06:23Z 29 7 23 65 (ENE) 50 - " 06:55Z 28 8 23 60 (ENE) 25 - " 07:27Z 28 8 18 57 (ENE) 19 - " 07:59Z 27 11 18 70 (ENE) 40 - " 08:32Z 26 13 18 62 (ENE) 67 - " 09:04Z 25 15 26 61 (ENE) 52 - " 09:35Z 25 16 19 58 (ENE) 43 - " 10:05Z 25 17 21 63 (ENE) 60 - " 10:37Z 24 17 22 66 (ENE) 51 - " 11:10Z 23 18 21 71 (ENE) 72 - " 11:42Z 23 17 20 68 (ENE) 74 - " 12:14Z 23 19 18 69 (ENE) 131 - " ---=== TELESCOPE STATUS ===--- 23:45Z Fans on, doors open 00:25Z Enclosure off 11:10Z Enclosure on, fans off with high humidity. Status at 11:40Z: Telescope stowed at: 30 deg Instrument mounted: Cartridge 9 Counterweights at: 290 Autofill systems: On 180L LN2 dewar weights: Spectro 223lb Imager 101 lb Interlocks bypassed: Alt slip, az slip. Slip detection tripped: Rotator found on closing. ---=== SOFTWARE USED ===--- IOP/SOP: v3_91_0 Watcher: v2_19_0 MCP: v5_13_5 TPM: tpm_v2_17_0 AstroDa: v14_47 TCC: 2.6.5 sdssProcedures: v1_54 SoS: v4_9_10 hoggPT: v1_5_8 plate-mapper: v4_1_0 ---=== MIRROR NUMBERS ===--- PRIMARY: -------- Scale: 1.000000 MIGS TONIGHT NOMINAL Axial A 0.0790 0.0790 Axial B 0.7960 0.7970 Axial C 0.8200 0.8240 Trans D -9.0870 -9.1130 Lateral E 1.8760 1.8870 Lateral F 1.4250 1.4300 GALILS Commanded: 5400. -3700. 900. -200. 31550. 30650. Actual: 5400. -3700. 900. -200. 31550. 30650. SETMIR VALUES PriDesOrient: 0.00 -11.80 23.00 1256.90 642.10 PriOrient: 0.00 -12.16 22.81 1257.41 642.19 SECONDARY: ---------- Focus: 0.00 Air Temp.: -0.1 Alt.: 30.023210 MIGS TONIGHT NOMINAL Axial A 1.5170 1.5170 Axial B 1.1580 1.1560 Axial C 1.1020 1.0990 Trans D -0.7060 -0.7070 GALILS Commanded: 1619592. 1555120. 1576323. -3400. -7900. Actual: 1619650. 1555250. 1576350. -3400. -7900. SETMIR VALUES SecDesOrient: 1257.00 0.00 -20.00 0.00 130.98 SecOrient: 1256.95 -0.04 -20.03 -0.49 130.91 ---=== PROBLEMS IN DETAIL ===--- Problem #1 - Cartridge 3 guide fiber dirt and focus --------------------------------------------------- This is really two problems but both tied to (at least) spectrograph cartridge 3. First, we saw lots of dirt visible on the guide fibers, though we do not know if the dirt is on the plate end or the guide camera end of the fibers. PR4410 filed on the cartridge fibers to determine where the dirt is, and to clean it off. Second, the end of the fibers in the guider flat were considerable more out of focus than for plate 6 (the previous plate mounted. Based on eyeballing the corona visible around the fiber ends in the flats in an saoimage display (IRAF on iggy is down!) we roughly estimate that the characteristic size of the defocus error added by the guide fibers not being in focus increased from plate 6 to plate 3 by ~0.6 arcsec. And lo and behold! the reported seeing on guide stars increased by ~0.6 arcsec. We are saving the guider flat field exposures in sdsshost:/home/prn/52590/guider_flat_plate_x (where x is the plate number). We question whether the relative position of the guide fiber termination block on the south slit-head block can be adjusted, and more, if it can drift in position (or be jarred), leading to the change in relative focus with respect to the guide camera. We later saw dirt on guide fiber flat-field images on several other cartridges and updated the PR accordingly. We also saw distinct scratches on the guide fiber termination blocks on several cartridges. Could the cause of these scratches have also jarred the blocks out of position? In any case, we ask that the engineers address PR 4410.