APACHE POINT OBSERVATORY SDSS 2.5M OBSERVING LOG Wednesday November 6, 2002 (MJD 52585) ---=== OBSERVING TEAM ===--- Atsuko Nitta (APO) Mike Harvanek (APO) Steph Snedden (APO; twilight flat taker and cardboard trimmer) visitor:Don York (UC) ---=== OBSERVING PLAN ===--- Science! ---=== OBSERVING SUMMARY ===--- Photometric sky with good seeing all night long, but the sky was brighter than normal in red tonight. We had a very hard time getting any valid S/N in red while doing spectro at the beginning of the night. After we switched to imaging, we got sky warning on i and z chips. LAter in the night, the sky warning was only for CCD45. We have no idea why the sky was brighter in red tonight than usual. It was not aurora activity from some of the www sites we checked. Spectro: We tried cart 7 plate 1143. Only 1 out of 4 science exposures got S/N good on all four CCDs. Imaging : 82S -162 --> -124 82N -142 --> -124 29S -65 --> -20 ---=== OBSERVING LOG ===--- 00:30Z We opened with Cartridge 7. With the wind from the north, we start with spectro. Cartridge 7 Plate 1143 Connie plate The first exposure (20min) did not make S/N^2=2 in both r1 and r2. We increased exposure time. Second exposure (25min exposure) got much better S/N in b1 and b2, but r1 and r2 still had S/N^2 < 2. The second exposure got S/N of b1=4.2, b2=6.1, r1=1.8, r2=1.8. SoS gave warning on scattered light, bad sky residuals for r1 and r2. The background sky values are abour 3 times higher in the red. WHY? The CCD temps looked fine. From the previous exposures on this plate, we know we should get similar S/N on both red and blue sides. JB was still on site and we asked for his help. He checked aurora activities which did not show any unusual high activities. SoS did not give out any"Max sky-residual chi2 = ... at 6303/6367 Ang" message which is triggered when aurora activity is strong. The messages triggered are in problem section. There was no light sources we could find at the telescope. 02:55Z The guider frame just before reading out the 3rd exposure lost all guide stars. WHY???????? o We stopped and restarted the guider, but we found no guide stars. o No clouds in the cloud camera. o We also stood outside to see if we could see any clouds missed by the cloud camera. No clouds we could see. o We do another gotoField --- no guide stars. o We went to fk5 -- FK5 star cannot be found with 25s exposure. o We did gotoField -gflat to make sure the guider is still working --- and it did take a gflat exposure. o In desperatoin, we redid loadCart, another gotoField, found no guide stars. o Another fk5 and searched for the fk5 star and spiral pattern with no success. o We moved the focus to make sure that the mirror was moving and it moved fine. o We then moved the telescope back to stow and checked mirror numbers. They were fine. o We cheked for M1 oscillations and rebooted the guide camera. o 03:24Z AZ got "too large to correct" fiducial correction. We forced corrections. This must have happened when we went to stow to check for the mirror numbers. o We finally found fk5 star again. We went back to field and we were able to find guide stars. At this point, we had 20min before nominal good observing time for this plate was over. We decided to take another science exposure and findout if we still have red camera not getting good S/N problem. The spectro science exposures on the monitor shows the sky line to be rather bright. The third exposure, taken before we lost the guide stars, got S/N^2 of 2.2 in r1 and 2.0 in r2. 03:50Z Seeing now is 1.2 -1.6". We will switch to imaging after the forth exposure. The S/N on this exposure was bad for r2 (1.6), but r1 made it (2.9). We took smear and postCalib in case the forth exposure is reduced. The smear is all in red. It is the sky that is killing us. 04:55Z With imager mounted, off we go to 82S. Run 3460 82S: Frame 25 lambda=-163 in focus, skippy good. start of the good science. We are getting watcher error on sky in r and i. We checked again aurora activities on the www, but nothing I could find indicating there was something bad in the sky over us. SOMETHING is making the sky noisier than usual. We are seeing both in imaging and spectro that the sky is a problem. The scrolling display also showed the i and z chips sometimes having bluish background instead of black, indicating the higher sky level. ~07:00Z Don York sat and watched the universe scroll by. He has not seen imaging since first light and enjoyed it very much. 07:45Z endDrift at frame 285 lambda -124. We now go to 82N. Run 3461 82S lambda=-143: With the new "autoscale" option, it takes longer for the drift to start. It almost took a full degree in lambda. Focus and skippy are good from the beginning of this run. 07:56Z CCD23 records FWHM=0.71". We go to 3.5m control room to ask Russet their seeing. They only had 0.8" on one chip. We had 0.8 on several chips. We suggested they refocus their instrument, but apparently, they just focused. CCD23 showed 0.7" seeing! 15CCDs are under 1.0"! 09:03Z endDrift on frame 129 lambda -124. Time to go and do north scan! Run 3462 29S Lambda=-65 Skippy and focus both good in frame 10. CCD45 is now the only one getting sky background watcher error for the past two runs. Frame 303 = in-focus lambda=-20 (-521) Frame 307 = -300 out of focus (-821) Frame 311 = +300 out of focus (-221) donuts are at the usual place. 12:10Z endDrift. Must take bias before quitting. Run 3463 on-scope bias. The new mask for 3.5m dome for the cloud camera worked well. endNight finished happily. ---=== IMAGING RUN SUMMARY ===--- Run Time Stripe Lambda Last Flavor Comments Start End Begin End Frame ------------------------------------------------------------------------- 3459 23:28Z 23:44Z 100 O 107.36 111.30 40 ignore 3460 04:59Z 07:47Z 82 S -165.59 -123.56 293 science 3461 07:50Z 09:04Z 82 N -142.23 -123.76 137 science 3462 09:07Z 12:11Z 29 S -64.29 -18.39 320 science 3463 12:14Z 12:31Z 100 O -60.70 -56.45 41 bias ---=== IMAGING RUN DETAILS ===--- ---=== SKIPPY RESULTS ===--- Run Frame nFrames stars muErr muRms nuErr nuRms rot az el --------------------------------------------------------------------------- 3460 11 4 52 0.900 0.120 7.200 0.104 0.00801 172 57 3460 64 4 44 3.600 0.090 -3.400 0.094 -0.00880 172 57 3460 118 4 32 1.800 0.830 -3.400 0.162 -0.00703 172 57 3460 171 4 48 2.100 0.112 -3.500 0.132 -0.00837 172 57 3460 222 4 55 2.500 0.551 -3.600 0.756 -0.01096 172 57 3460 276 4 36 1.600 0.674 -3.800 0.111 -0.00896 172 57 3461 25 4 49 -1.300 0.837 -5.400 0.149 -0.01215 207 54 3461 76 4 55 -0.500 0.806 -5.700 0.718 -0.01111 207 54 3461 125 4 47 -0.900 0.162 -5.500 0.113 -0.01241 207 54 3462 17 4 135 0.700 0.120 -1.900 0.167 -0.01111 104 56 3462 70 4 125 3.400 0.570 0.700 0.455 -0.01023 96 60 3462 120 4 107 3.200 0.119 1.500 0.147 -0.00927 87 62 3462 172 4 82 2.600 0.464 4.300 0.680 -0.00845 77 63 3462 225 4 54 1.400 0.115 6.800 0.121 -0.01113 68 63 3462 275 4 54 0.300 0.094 7.000 0.100 -0.01255 61 62 ---=== LTMATCH RESULTS ===--- Run Field nFields alt az nGood rowMean rowSig colMean colSig rot ------------------------------------------------------------------------ 3460 21 1 57 8 13 -3.599 0.363 -25.503 0.160 0.08574 3460 21 1 57 8 6 -2.553 0.149 -25.464 0.124 0.08561 3460 21 1 57 8 15 -1.420 0.353 -25.421 0.214 0.08547 3460 21 1 57 8 18 -0.179 0.299 -25.370 0.257 0.08529 3460 21 1 57 8 11 0.850 0.297 -25.574 0.189 0.08598 3460 41 1 57 8 7 0.403 0.253 2.508 0.347 -0.00843 3460 41 1 57 8 21 0.540 0.224 2.651 0.286 -0.00891 3460 41 1 57 8 8 0.504 0.226 2.374 0.335 -0.00798 3460 41 1 57 8 15 0.512 0.234 2.473 0.324 -0.00831 3460 41 1 57 8 16 0.516 0.292 2.657 0.359 -0.00893 3460 76 1 57 8 14 -0.994 0.141 1.943 0.177 -0.00653 3460 76 1 57 8 17 -1.020 0.088 1.956 0.113 -0.00658 3460 76 1 57 8 20 -1.083 0.081 1.888 0.179 -0.00635 3460 76 1 57 8 17 -1.050 0.107 2.027 0.198 -0.00682 3460 76 1 57 8 14 -1.134 0.068 2.113 0.114 -0.00710 3460 92 1 57 8 13 0.279 0.171 2.738 0.116 -0.00921 3460 92 1 57 8 20 0.409 0.194 2.773 0.150 -0.00932 3460 92 1 57 8 22 0.219 0.192 2.785 0.125 -0.00937 3460 92 1 57 8 15 0.240 0.212 2.891 0.161 -0.00972 3460 92 1 57 8 18 0.283 0.329 2.843 0.119 -0.00956 3460 129 1 57 8 12 -1.037 0.089 2.556 0.156 -0.00859 3460 129 1 57 8 11 -1.067 0.097 2.798 0.119 -0.00941 3460 129 1 57 8 20 -1.132 0.098 2.836 0.142 -0.00954 3460 129 1 57 8 22 -1.180 0.111 2.945 0.130 -0.00990 3460 129 1 57 8 11 -1.240 0.102 2.867 0.106 -0.00964 3460 145 1 57 8 16 -0.278 0.160 2.660 0.123 -0.00894 3460 145 1 57 8 19 -0.226 0.198 2.679 0.099 -0.00901 3460 145 1 57 8 14 -0.331 0.140 2.659 0.149 -0.00894 3460 145 1 57 8 17 -0.227 0.152 2.767 0.115 -0.00930 3460 145 1 57 8 10 -0.350 0.128 2.824 0.112 -0.00949 3460 180 1 57 8 15 0.001 0.095 2.944 0.233 -0.00990 3460 180 1 57 8 25 0.008 0.110 3.023 0.197 -0.01016 3460 180 1 57 8 15 0.005 0.108 3.141 0.166 -0.01056 3460 180 1 57 8 20 0.003 0.146 3.009 0.221 -0.01012 3460 180 1 57 8 13 -0.075 0.137 3.131 0.198 -0.01053 3460 198 1 57 8 23 -0.150 0.147 2.375 0.160 -0.00799 3460 198 1 57 8 22 -0.269 0.188 2.408 0.132 -0.00809 3460 198 1 57 8 19 -0.304 0.251 2.327 0.217 -0.00782 3460 198 1 57 8 13 -0.290 0.177 2.538 0.150 -0.00853 3460 198 1 57 8 21 -0.262 0.168 2.528 0.184 -0.00850 3460 235 1 57 8 16 -0.697 0.082 2.578 0.159 -0.00867 3460 235 1 57 8 21 -0.706 0.117 2.598 0.123 -0.00873 3460 235 1 57 8 19 -0.799 0.130 2.459 0.193 -0.00827 3460 235 1 57 8 24 -0.780 0.093 2.544 0.130 -0.00855 3460 235 1 57 8 22 -0.817 0.102 2.424 0.164 -0.00815 3460 253 1 57 8 26 -0.488 0.100 2.927 0.131 -0.00984 3460 253 1 57 8 19 -0.456 0.088 2.979 0.073 -0.01002 3460 253 1 57 8 25 -0.501 0.095 2.949 0.117 -0.00992 3460 253 1 57 8 18 -0.547 0.082 3.077 0.054 -0.01034 3460 253 1 57 8 19 -0.587 0.149 2.962 0.107 -0.00996 3462 287 1 61 121 22 -0.282 0.191 4.264 0.354 -0.01434 3462 287 1 61 121 14 -0.380 0.162 4.447 0.313 -0.01495 3462 287 1 61 121 14 -0.287 0.117 4.548 0.172 -0.01529 3462 287 1 61 121 16 -0.247 0.195 4.422 0.330 -0.01487 3462 287 1 61 121 10 -0.286 0.159 4.519 0.167 -0.01519 ---=== SPECTROSCOPY DATA SUMMARY ===--- UT Exp Time flavor comment (S/N)^2 totals ========================================== b1 r1 b2 r2 ----- sequence 16851, plate 1143 ------- 01:26 16851 10.0 flat 01:28 16852 2.0 arc 01:53 16853 1200.1 target 02:22 16854 1500.1 target 02:54 16855 1800.1 target 04:18 16856 1200.1 target 04:26 16857 240.0 smear 04:29 16858 10.0 flat 04:32 16859 2.0 arc ---=== TELESCOPE OFFSETS AND SCALE I ===--- Time Instrument Az Alt Rot Scale pos offset pos offset pos offset ------------------------------------------------------------------------------ 01:31Z 7 1143 22.08 0.0006 55.17 0.0005 198.33 -0.0167 1.000080 03:59Z 7 1143 -40.32 0.0008 49.82 0.0028 146.94 -0.0167 1.000000 The second offset data on cart 7 is after we found the guide stars again. The ALT offset seems to be large. 05:23Z imager 7.65 0.0000 56.87 0.0000 96.25 0.0000 1.000000 08:24Z imager -27.04 0.0000 54.25 0.0000 67.36 0.0000 1.000000 ---=== TELESCOPE OFFSETS AND SCALE II ===--- ---=== DATA TAPE SUMMARY ===--- Goes: JL5675-5681 Stays: JL5682-5688 ---=== FOCUS LOG ===--- setmir piston Temp Wind Time Inst scale M1 M2 Foc Az Alt (C) MPH Dir filt fwhm ------------------------------------------------------------------------------ 01:32Z 7 1143 1.00008 -789 411 -100 22 55.2 5.8 7 28 gdr 2.3 02:15Z 7 1143 1.00002 -198 846 -150 3 57.2 4.9 9 348 gdr 1.6 04:01Z 7 1143 1.00000 0 957 -225 -41 49.5 8.7 0 150 gdr 1.3 05:23Z imager 1.00000 0 -578 -473 8 56.9 8.3 5 179 23 1.2 07:28Z imager 1.00000 0 -557 -453 8 56.9 8.2 4 182 24 0.84 08:24Z imager 1.00000 0 -555 -458 -27 54.3 7.0 5 181 23 0.73 ---=== WEATHER LOG ===--- Wind Time Temp F Dewp F MPH Direction Dust DIMM Sky 23:33Z 46 6 1 261 (W) 127 - clear 00:05Z 44 1 7 352 (NNW) 70 - " 00:38Z 42 -5 3 65 (ENE) 18 - " 01:09Z 43 -9 2 358 (NNW) 6 - " 01:49Z 42 -8 9 350 (NNW) 4 - 02:23Z 41 -8 0 79 (E) 9 - 02:56Z 43 -10 6 82 (E) 8 - 03:28Z 46 -13 0 3 (N) 5 - 04:00Z 47 -12 0 135 (SE) 4 - 04:32Z 47 -13 6 107 (ESE) 17 - 05:05Z 46 -13 8 141 (SE) 9 - 05:37Z 47 -13 5 181 (S) 2 - 06:09Z 46 -14 5 179 (S) 4 - 06:41Z 46 -14 7 177 (S) 1 - 07:13Z 46 -13 5 180 (S) 10 - 07:44Z 46 -13 5 181 (S) 0 - 08:14Z 44 -15 5 181 (S) 1 - 08:46Z 44 -15 5 180 (S) 3 - 09:18Z 43 -12 5 182 (S) 23 - 09:50Z 43 -12 4 179 (S) 6 - 10:22Z 42 -10 7 183 (S) 21 - 10:55Z 42 -14 4 185 (S) 26 - 11:27Z 43 -15 5 196 (SSW) 8 - 11:59Z 44 -16 1 220 (SW) 14 - 12:32Z 42 -17 6 226 (SW) 16 - 13:05Z 39 -19 4 204 (SSW) 11 - ---=== TELESCOPE STATUS ===--- 00:30Z Scope opened with cartridge 7 12:30Z Closed, all fans off. Telescope at stow with imager mounted. Specrto autofill system connected. imager dewar @ 186lb spectro dewar @ ---=== 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 0.0770 0.0790 Axial B 0.7960 0.7970 Axial C 0.8160 0.8240 Trans D -9.0800 -9.1130 Lateral E 1.8790 1.8870 Lateral F 1.4240 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.: 7.3 Alt.: 30.000183 MIGS TONIGHT NOMINAL Axial A 1.5180 1.5170 Axial B 1.1620 1.1560 Axial C 1.1020 1.0990 Trans D -0.7090 -0.7070 GALILS Commanded: 1619668. 1555240. 1576417. -3400. -7900. Actual: 1619650. 1555250. 1576350. -3400. -7900. SETMIR VALUES SecDesOrient: 1257.00 0.00 -20.00 0.00 130.98 SecOrient: 1257.02 -0.04 -20.01 -0.49 130.90 ---=== PROBLEMS IN DETAIL ===--- Robert, why did we have a bright reddish sky tonight? SoS warnings during cart 7 plate 1143 observations: sdR-r1-00016853.fit: WARNING: Scattered light max = 110 electrons (Warm CCD or twi?) sdR-r1-00016853.fit: WARNING: Bad sky residuals at 8848 to 8975 Ang; Peak chi= 5.51 sdR-r2-00016853.fit: WARNING: Scattered light max = 93 electrons (Warm CCD or twi?) sdR-r2-00016853.fit: WARNING: Bad sky residuals at 8307 to 8361 Ang; Peak chi= 5.31 sdR-r2-00016853.fit: WARNING: Bad sky residuals at 8371 to 8438 Ang; Peak chi= 5.35 sdR-r2-00016853.fit: WARNING: Bad sky residuals at 8861 to 8928 Ang; Peak chi= 7.34 sdR-r2-00016853.fit: WARNING: Median sky-residual chi2 = 2.06458 sdR-r1-00016854.fit: WARNING: Scattered light max = 149 electrons (Warm CCD or twi?) sdR-r1-00016854.fit: WARNING: Bad sky residuals at 8390 to 8440 Ang; Peak chi= 4.80 sdR-r1-00016854.fit: WARNING: Bad sky residuals at 8865 to 9021 Ang; Peak chi= 4.72 sdR-r1-00016854.fit: WARNING: Median sky-residual chi2 = 2.45501 sdR-r1-00016854.fit: WARNING: Max sky-residual chi2 = 78.1945 at 8347.20 Ang (ignoring 5577) sdR-r2-00016854.fit: WARNING: Scattered light max = 126 electrons (Warm CCD or twi?) sdR-r2-00016854.fit: WARNING: Bad sky residuals at 7796 to 7831 Ang; Peak chi= 4.10 sdR-r2-00016854.fit: WARNING: Bad sky residuals at 7986 to 8021 Ang; Peak chi= 5.00 sdR-r2-00016854.fit: WARNING: Bad sky residuals at 8300 to 8363 Ang; Peak chi= 5.47 sdR-r2-00016854.fit: WARNING: Bad sky residuals at 8366 to 8446 Ang; Peak chi= 5.70 sdR-r2-00016854.fit: WARNING: Bad sky residuals at 8767 to 8935 Ang; Peak chi= 9.54 sdR-r2-00016854.fit: WARNING: Median sky-residual chi2 = 2.59326 sdR-r2-00016854.fit: WARNING: Max sky-residual chi2 = 91.0091 at 8889.37 Ang (ignoring 5577) sdR-r1-00016855.fit: WARNING: Scattered light max = 178 electrons (Warm CCD or twi?) sdR-r1-00016855.fit: WARNING: Bad sky residuals at 8829 to 9032 Ang; Peak chi= 5.53 sdR-r1-00016855.fit: WARNING: Median sky-residual chi2 = 2.55668 sdR-r2-00016855.fit: WARNING: Scattered light max = 152 electrons (Warm CCD or twi?) sdR-r2-00016855.fit: WARNING: Bad sky residuals at 7735 to 7773 Ang; Peak chi= 5.80 sdR-r2-00016855.fit: WARNING: Bad sky residuals at 7775 to 7822 Ang; Peak chi= 4.48 sdR-r2-00016855.fit: WARNING: Bad sky residuals at 7823 to 7861 Ang; Peak chi= 5.34 sdR-r2-00016855.fit: WARNING: Bad sky residuals at 7885 to 7920 Ang; Peak chi= 4.97 sdR-r2-00016855.fit: WARNING: Bad sky residuals at 7991 to 8026 Ang; Peak chi= 5.05 sdR-r2-00016855.fit: WARNING: Bad sky residuals at 8377 to 8439 Ang; Peak chi= 6.51 sdR-r2-00016855.fit: WARNING: Bad sky residuals at 8694 to 8989 Ang; Peak chi= 11.19 sdR-r2-00016855.fit: WARNING: Median sky-residual chi2 = 2.58193 sdR-r2-00016855.fit: WARNING: Max sky-residual chi2 = 125.170 at 8923.77 Ang (ignoring 5577) sdR-r1-00016856.fit: WARNING: Scattered light median = 45 electrons (Warm CCD or twi?) sdR-r1-00016856.fit: WARNING: Scattered light max = 137 electrons (Warm CCD or twi?) sdR-r1-00016856.fit: WARNING: Bad sky residuals at 8836 to 8999 Ang; Peak chi= 5.92 sdR-r1-00016856.fit: WARNING: Median sky-residual chi2 = 2.00383 sdR-b1-00016856.fit: WARNING: Max sky-residual chi2 = 422.736 at 5884.16 Ang (ignoring 5577) sdR-r2-00016856.fit: WARNING: Large flexure flat<->science (Post-calibs recommended!) sdR-r2-00016856.fit: WARNING: Scattered light median = 57 electrons (Warm CCD or twi?) sdR-r2-00016856.fit: WARNING: Scattered light max = 136 electrons (Warm CCD or twi?) sdR-r2-00016856.fit: WARNING: Bad sky residuals at 7724 to 7868 Ang; Peak chi= 6.64 sdR-r2-00016856.fit: WARNING: Bad sky residuals at 7885 to 7932 Ang; Peak chi= 7.33 sdR-r2-00016856.fit: WARNING: Bad sky residuals at 8340 to 8378 Ang; Peak chi= 12.40 sdR-r2-00016856.fit: WARNING: Bad sky residuals at 8381 to 8471 Ang; Peak chi= 9.13 sdR-r2-00016856.fit: WARNING: Bad sky residuals at 8767 to 9010 Ang; Peak chi= 11.41 sdR-r2-00016856.fit: WARNING: Median sky-residual chi2 = 2.72180 sdR-r2-00016856.fit: WARNING: Max sky-residual chi2 = 153.690 at 8349.01 Ang (ignoring 5577)