APACHE POINT OBSERVATORY SDSS 2.5M OBSERVING LOG Thursday April 3, 2003 (MJD 52733) ---=== OBSERVING TEAM ===--- Swing: Atsuko Nitta Night: Dan Long Mike Harvanek ---=== OBSERVING PLAN ===--- Science! ---=== OBSERVING SUMMARY ===--- Three plates done (8 1196, 4 1227, 7 1047), and 3 1233 partially done. Various combinations of wind, dust, and clouds kept us off the sky for a total of about 4.5 hours. Note: Met tower dust counter is reading low by approximately a factor of two (1.7 to 2.2) from both the 3.5m counter and the spare. Definitely something to be aware of this time of year. ---=== OBSERVING LOG ===--- Afternoon ========== Spectro focus checked. All in focus. Night ========== After ventilating for about an hour we close up shortly before sunset due to high wind and dust. Waiting on wind and dust, then just dust. Partly cloudy skies most of the time. Cartridge 8 1196: 18.4 17.6 17.9 18.7 20193 04:53Z gotoField: no guide stars on slew. Needed FK5. Lots of trouble with equilibration, rapid focus and scale changes since the fans and doors were only turned on when we opened due to the dust problem. 05:23Z Start of first science exposure Seeing varying from 1.6 to more than 2.5 arcseconds. 05:30Z Skies clear Done in three exposures 06:30Z instChange 06:31Z spurious "too large to correct" error on altitude Cartridge 4 1227: 18.1 18.0 17.3 17.0 20199 06:35Z gotoField: guide stars on slew Blank guider frame in first frame of focus sweep Blank guider frame in first frame when guider started after focus sweep 07:01Z Start of first science exposure Blank guider frame in first frame of guiding on science Blank guider frame in 2nd frame of guiding on science This is becoming uncomfortably frequent. PR 5120 filed. See problem section for details. Done in three exposures 07:58Z instChange Cartridge 3 1233: 9.2 8.3 8.4 9.6 20205 08:03Z gotoField: guide stars on slew Blank guider frame on first guider flat during gotoField Blank guider frame on preCal guider flat. 08:25Z Start of first science exposure 08:45Z Clouds move in during second exposure. 09:03Z Exposure aborted because thick clouds move in early in exposure (the abort 09:12Z Exposure no good. S/N less than 1 in 20 minute exposure Plate expires before we can finish it. 09:30Z We wait before switching to next cartridge until clouds thin. 10:00Z Still waiting. 10:20Z Decide to put cartridge 7 on as it is breaking up. Lost approximately an hour-and-a-half to clouds. Cartridge 7 1047: 23.8 19.4 23.1 19.4 20211 10:23Z gotoField: guide stars on slew large scale change required from previous plate, -.029. 1233 drilled for -2.7C, 1047 drilled for 13.3C! 10:41Z Start of first science exposure Got 7's in 15 minutes. If the clouds stay away we should finish this one. Definitely done in three. The first plate of the night which asked for postCals. 11:50Z instChange to cartridge 1 then close. 12:20Z endNight rejoices ---=== IMAGING RUN SUMMARY ===--- Run Time Stripe Lambda Last Flavor Comments Start End Begin End Frame ------------------------------------------------------------------------- 3845 23:07Z 23:36Z 100 O -112.19 -104.88 63 ignore ---=== 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):y Spectro QA: Bias levels: OK bias 20190 r2 had the second bin from the left side in apo_plotbias was at a level of zero. bias 20182 showed a similar dropout for b2 and r1. Looking back at the biases from last night 20178 didn't show this (the only one plotted last night), 20177 did in r1, 20173 did in r1 as well. Is this something we need to be concerned with ( e.g. stuck bit ), or is this just some plot artifact? Flats: OK r2 upper right corner looses two fibers off the edge. Arcs: OK UT Exp Time flavor comment (S/N)^2 totals ========================================== b1 r1 b2 r2 ----- sequence 20182, plate -9999 ------- 22:58 20182 0.0 bias ----- sequence 20183, plate 1047 ------- 23:07 20183 10.0 flat 23:27 20184 2.1 arc 23:29 20185 2.1 arc 23:40 20186 2.0 arc 23:43 20187 2.1 arc 23:46 20188 2.1 arc ----- sequence 20189, plate -9999 ------- 00:31 20189 0.0 bias 00:54 20190 0.0 bias ----- sequence 20191, plate 1196 ------- 18.4 17.6 17.9 18.7 Done 05:19 20191 10.0 flat 05:21 20192 2.0 arc 05:40 20193 900.1 target 05:58 20194 900.1 target 06:21 20195 1200.1 target 06:29 20196 240.0 smear ----- sequence 20197, plate 1227 ------- 18.1 18.0 17.3 17.0 Done 06:54 20197 10.0 flat 06:56 20198 2.0 arc 07:15 20199 720.1 target 07:33 20200 900.1 target 07:48 20201 720.1 target 07:56 20202 240.0 smear ----- sequence 20203, plate 1233 ------- 9.2 8.3 8.4 9.6 Done 08:12 20203 10.0 flat 08:15 20204 2.0 arc 08:39 20205 720.1 target 09:02 20206 1200.1 target 09:07 20207 82.9 target exposure aborted, BAD 09:34 20208 1200.1 target low signal, BAD ----- sequence 20209, plate 1047 ------- 23.8 19.4 23.1 19.4 Done 10:37 20209 10.0 flat 10:39 20210 2.0 arc 10:59 20211 900.1 target 11:17 20212 900.1 target 11:34 20213 900.1 target 11:43 20214 240.0 smear 11:46 20215 10.0 flat 11:48 20216 2.0 arc ---=== TELESCOPE OFFSETS AND SCALE I ===--- Time Instrument Az Alt Rot Scale pos offset pos offset pos offset ------------------------------------------------------------------------------ 05:16Z 8 1196 -43.86 0.0051 57.45 0.0017 143.94 -0.0117 1.000290 06:56Z 4 1227 -28.00 0.0054 64.70 0.0010 156.31 -0.0023 1.000060 09:29Z 3 1233 -67.03 0.0077 47.13 0.0019 128.11 0.0059 1.000150 10:35Z 7 1047 220.71 0.0029 65.11 0.0009 57.34 -0.0057 0.999860 ---=== TELESCOPE OFFSETS AND SCALE II ===--- ---=== DATA TAPE SUMMARY ===--- Goes: JL6238 Stays: JL6239 ---=== FOCUS LOG ===--- setmir piston Temp Wind Time Inst scale M1 M2 Foc Az Alt (C) MPH Dir filt fwhm ------------------------------------------------------------------------------ 05:17Z 8 1196 1.00029 -2863 -1062 150 -44 57.4 2.5 16 289 - 1.7 07:03Z 4 1227 1.00011 -1085 219 -25 -31 64.0 1.6 15 271 - 2.0 09:30Z 3 1233 1.00015 -1480 -61 -25 -67 47.1 0.4 10 274 - 2.0 10:35Z 7 1047 0.99986 1381 2235 -50 221 65.1 -0.4 19 245 - 1.6 ---=== WEATHER LOG ===--- Wind Time Temp F Dewp F MPH Direction Dust DIMM Sky 22:56Z 48 15 26 263 (W) 1160 - Mostly Clear 23:28Z 44 11 24 265 (W) 1864 - Partly Cloudy 00:00Z 45 12 21 236 (SW) 1742 - Partly Cloudy 00:41Z 42 10 21 260 (W) 1289 - Partly Cloudy 01:12Z 42 11 26 250 (WSW) 2651 - Partly Cloudy 01:42Z 41 9 22 262 (W) 2088 - Mostly Cloudy 02:14Z 39 6 28 247 (WSW) 1833 - Mostly Clear 02:46Z 39 5 19 262 (W) 2018 - Partly Cloudy 03:19Z 38 5 19 282 (WNW) 1729 - Partly Cloudy 03:50Z 37 6 22 282 (WNW) 1414 - Partly Cloudy 04:22Z 37 6 22 285 (WNW) 1366 - Partly Cloudy 04:52Z 36 7 17 276 (W) 1454 - Partly Cloudy 05:23Z 36 6 19 276 (W) 983 - Mostly Clear 05:54Z 36 7 21 289 (WNW) 990 - Clear 06:27Z 35 7 26 280 (W) 975 - Clear 06:59Z 34 8 23 285 (WNW) 886 - Clear 07:30Z 34 9 22 285 (WNW) 865 - Clear 08:00Z 33 10 24 274 (W) 1004 - Clear 08:32Z 33 10 11 265 (W) 931 - Clear 09:16Z 32 11 9 282 (WNW) 999 - Mostly Cloudy 09:49Z 32 8 11 275 (W) 1142 - Mostly Cloudy 10:20Z 31 8 13 236 (SW) 896 - Partly Cloudy 10:52Z 30 9 17 264 (W) 1027 - Clear 11:25Z 29 12 11 270 (W) 1272 - Clear 11:58Z 28 14 14 307 (NW) 1169 - Mostly Clear 12:29Z 27 15 14 311 (NW) 1176 - Mostly Clear ---=== TELESCOPE STATUS ===--- 00:20Z Doors open, fans on 01:15Z Doors closed, fans off ( dust, wind ) 04:25Z Enclosure open, fans on 12:05Z Enclosure closed, fans off Stowed at 30 deg alt, Cartridge 1 installed. Spectro auto-fill connected. Spectrograph dewar (Y) 12:10Z Dewar wt 183 lb Imager dewar (Y) 12:10Z Dewar wt 141 lb No interlocks bypassed ---=== SOFTWARE USED ===--- IOP/SOP: v3_113_1 Watcher: v2_22_0 MCP: v5_18_0 TPM: tpm_v2_28_0 AstroDa: v14_47 TCC: TCC 2.6.8 November 13 2002 sdssProcedures: v1_67 SoS: v4_9_13 hoggPT: v1_6_8 plate-mapper: v4_2_0 ---=== MIRROR NUMBERS ===--- PRIMARY: -------- Scale: 1.000000 MIGS TONIGHT NOMINAL Axial A 0.0910 0.0790 Axial B 0.7990 0.7970 Axial C 0.8160 0.8240 Trans D -9.0680 -9.1130 Lateral E 1.8750 1.8870 Lateral F 0.0000 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.: 6.8 Alt.: 30.122330 MIGS TONIGHT NOMINAL Axial A 1.5170 1.5170 Axial B 1.1580 1.1560 Axial C 1.1020 1.0990 Trans D -0.6970 -0.7070 GALILS Commanded: 1619661. 1555258. 1576291. -3400. -7900. Actual: 1619650. 1555250. 1576350. -3400. -7900. SETMIR VALUES SecDesOrient: 1257.00 0.00 -20.00 0.00 130.98 SecOrient: 1256.99 0.01 -20.01 -0.49 130.87 ---=== PROBLEMS IN DETAIL ===--- PR 5120: Getting blank guider frames. Over the last couple of weeks we have seen an increasing number of blank guider frames. It seems to happen most often at the start of a sequence (startGuider, guiderFocus), but occasionally will happen other times. it started as a once every couple of night occurrence, but it just happened four times on the same plate tonight (cartridge 4 1227, between 06:35Z and 07:05Z). It is not clear whether this is a hardware or software issue. If hardware, the shutter would seem the most likely candidate( clouds and flat-field screens have been ruled out). For these exposures, the TCC is sending doread commands with the proper exposure time, so either the guider isn't doing what it's being told, or the guider monitor isn't getting the right frame even though the name is correct. Later in the night there were two blank guider flat frames. This rules out the incorrect frame being labeled current since guider flats are a different size (unbinned) and the blank guider frames were the correct size.