APACHE POINT OBSERVATORY SDSS 2.5M OBSERVING LOG Saturday October 16, 2004 (MJD 53295) ---=== OBSERVING TEAM ===--- Night: John Barentine Atsuko Nitta French Leger and Jon Brinkmann (phone support) ---=== OBSERVING PLAN ===--- Science! ---=== OBSERVING SUMMARY ===--- Under variably cloudy skies, we finished one plate (SEGUEfaint, 1911) and got signal on four others. The sky was never photometric so we spectro'd all night. ---=== OBSERVING LOG ===--- Afternoon ========= We are Pete-less today. No chance for evening PT twilight flats due to moderately thick cirrus all over the sky near sunset (the sky was never photometric during the night and continues to be soupy at twilight, so we just shut down the PT altogther). We opted not to check spectro focus. Started by loading Cart 4, Plate 1917. Night ===== 01:15Z Cart 4, Plate 1917. No stars on gotoField in 30 s exposures (though likely due to clouds and twilight. Found a bright star with fk5InFiber. This is a SEGUEfaint plate requiring (S/N)^2 of 50 in red, but with the clouds and corresponding low efficiency, we did not plan to finish it. Got three science exposures with a low total of 9.2 in (S/N)^2. 03:15Z Loaded Cart 7, Plate 1911. Another SEGUEfaint plate with some signal on it already. Stars on goToField. Clouds were a little thinner during this plate than the previous, resulting in higher efficiency. With the signal already on the plate before we began tonight, we finished the plate in three 1500 s exposures. 05:00Z Loaded Cart 2, Plate 1913. Another SEGUEfaint plate, but with no previously-gathered signal on it before tonight. Had difficulty with the instChange on this, in that the altitude pin stuck when insertion was attempted; see Problems section. Stars on gotoField. Completed one science exposure and started a second before clouds significantly thickened near 06:00Z and efficiency dropped sharply. Atsuko read out the exposure early at 06:07Z with ~1385 s of exposure. Started a third exposure at 06:25Z. The lowest red (S/N)^2 we achieved on this plate was 9.8. 07:00Z Loaded Cart 6, Plate 1907. More SEGUEfaint with no signal on it to start. Stars on gotoField. Did three 1500 s exposures on this plate for a resulting lowest total red (S/N)^2 of 20.9. 08:40Z Loaded Cart 8, Plate 1557. This is a low-z plate with no signal on it to start. No stars on gotoField; we did an fk5InFiber About the time we started this plate, we got a critical error on the ion pump pressure; see the Problems section for details. Got two science exposures on this plate before it expired and we had to move on. 10:00Z Loaded Cart 1, Plate 1634. Photo-z plate with (S/N)^2=13 already on it. No stars initially on gotoField until we forced a fiducial in the MCP. We waited out the clouds for nearly 30 minutes and conditions got better, then worse. Made a go at it and started a science exposure as the clouds thickened; aborted the exposure at 11:05Z just as the plate expired. At that point we called it quits for the night. endNight rejoiced. ---=== IMAGING RUN SUMMARY ===--- 4896 23:37Z 00:17Z 100 O 89.20 99.34 82 ignore ---=== IMAGING RUN DETAILS ===--- ---=== SKIPPY RESULTS ===--- ---=== LTMATCH RESULTS ===--- ---=== SPECTROSCOPY DATA SUMMARY ===--- Summary Checked (y/n): yes QA Procedures Done (y/n): yes UT Exp Time flavor comment (S/N)^2 totals ==================================================== b1 r1 b2 r2 ----- sequence 28875, plate 1917 ------- 16.8 9.2 18.1 11.2 01:38 28875 10.0 flat 01:40 28876 2.0 arc 02:09 28877 1500.1 target 02:37 28878 1500.1 target 03:05 28879 1500.1 target ----- sequence 28880, plate 1911 ------- DONE 28.3 20.0 32.8 27.0 03:21 28880 10.0 flat 03:23 28881 2.0 arc 03:53 28882 1500.1 target 04:21 28883 1500.1 target 04:50 28884 1500.1 target ----- sequence 28885, plate 1913 ------- 18.2 9.8 16.1 11.8 05:06 28885 10.0 flat 05:09 28886 2.0 arc 05:42 28887 1500.1 target 06:06 28888 1295.8 target 06:51 28889 1500.1 target ----- sequence 28890, plate 1907 ------- 27.2 20.9 33.8 24.3 07:04 28890 10.0 flat 07:06 28891 2.0 arc 07:36 28892 1500.1 target 08:04 28893 1500.1 target 08:32 28894 1500.1 target ----- sequence 28895, plate 1557 ------- 19.1 14.8 20.1 15.1 08:50 28895 10.0 flat 08:52 28896 2.0 arc 09:22 28897 1500.1 target 09:51 28898 1500.1 target ----- sequence 28899, plate 1634 ------- 10:16 28899 10.0 flat 10:18 28900 2.0 arc ---=== TELESCOPE OFFSETS AND SCALE I ===--- Time Instrument Az Alt Rot Scale pos offset pos offset pos offset 01:37Z 4 1917 11.16 0.0005 50.65 -0.0027 189.30 0.0046 1.000150 03:28Z 7 1911 17.91 0.0001 46.21 -0.0043 195.07 -0.0067 1.000190 05:17Z 2 1913 9.32 0.0006 46.80 -0.0032 187.87 0.0211 1.000110 07:08Z 6 1907 -2.71 0.0016 57.21 -0.0028 177.63 -0.0044 1.000110 09:07Z 8 1557 -38.70 0.0011 50.47 -0.0051 148.19 -0.0137 1.000110 ---=== TELESCOPE OFFSETS AND SCALE II ===--- ---=== DATA TAPE SUMMARY ===--- Goes: JL7936-7941 Stays: JL7943-7947 ---=== FOCUS LOG ===--- setmir piston Temp Wind Time Inst scale M1 M2 Foc Az Alt (C) MPH Dir filt fwhm 01:37Z 4 1917 1.00015 -1480 28 75 11 50.6 9.6 14 240 -- 1.6 03:28Z 7 1911 1.00019 -1875 -359 0 18 46.2 10.0 10 222 -- 1.7 05:17Z 2 1913 1.00011 -1086 343 50 9 46.8 9.8 15 276 -- 2.0 07:09Z 6 1907 1.00011 -1086 236 -25 -3 57.2 9.9 16 275 -- 1.3 09:07Z 8 1557 1.00011 -1086 255 -25 -39 50.4 9.3 16 280 -- 1.2 ---=== WEATHER LOG ===--- Wind Time Temp F Dewp F MPH Direction Dust DIMM Sky 00:08Z 51 24 16 241 (WSW) 912 - MstlyCldy 00:40Z 50 24 12 240 (WSW) 1023 - "" 01:12Z 49 22 16 233 (SW) 1141 - "" 01:45Z 49 20 11 244 (WSW) 1006 - "" 02:18Z 49 19 11 226 (SW) 956 - "" 02:50Z 49 19 12 260 (W) 863 - "" 03:24Z 50 17 15 252 (WSW) 752 - "" 03:55Z 49 17 14 266 (W) 732 - "" 04:26Z 49 18 12 268 (W) 883 - "" 04:56Z 49 22 13 268 (W) 1084 - "" 05:28Z 49 24 11 273 (W) 1215 - "" 05:59Z 49 23 13 272 (W) 1173 - "" 06:31Z 49 23 11 274 (W) 1238 - "" 07:04Z 49 23 14 280 (W) 1301 - "" 07:36Z 49 24 14 267 (W) 1461 - "" 08:09Z 48 25 16 275 (W) 1442 - "" 08:40Z 49 25 19 275 (W) 1419 - "" 09:10Z 48 25 11 279 (W) 1417 - "" 09:42Z 48 25 15 273 (W) 1380 - "" 10:13Z 48 24 15 272 (W) 1412 - "" 10:43Z 48 24 16 279 (W) 1337 - "" 11:16Z 47 24 18 268 (W) 1318 - "" 11:47Z 47 24 19 271 (W) 1335 - ---=== TELESCOPE STATUS ===--- 00:00Z Fans on, garage doors cracked 00:35Z Rolled back the enclosure 11:20Z Enclosure on, fans off, spectro auto-fill reconnected Left Cart 1, Plate 1643 mounted, counterweights at 250 Dewar weights at 11:25Z Imager: 244.3lbs 21 psi Spectro: 160.1lbs 22 psi No interlocks bypassed. ---=== SOFTWARE USED ===--- IOP/SOP: v3_142_0 Watcher: v2_29_0 MCP: v5_25_0 TPM: tpm_v2_42_0 AstroDa: v14_47 TCC: TCC 2.7.2.1 August 6 2004 sdssProcedures: v1_94 SoS: v4_10_7 hoggPT: v1_6_9 plate-mapper: v4_3_1 ---=== MIRROR NUMBERS ===--- PRIMARY: -------- Scale: 1.000000 MIGS TONIGHT NOMINAL Axial A 0.5230 0.5250 Axial B 0.5990 0.6020 Axial C 0.9060 0.9050 Trans D -8.6150 -8.6120 Lateral E 10.0330 10.0203 Lateral F 11.5951 11.5951 GALILS Commanded: 4800. -2150. 2600. -6900. -7850. -7900. Actual: 4800. -2150. 2600. -6900. -7850. -7900. SETMIR VALUES PriDesOrient: 0.00 -2.76 1.04 57.00 151.01 PriOrient: 0.00 -3.04 0.88 57.42 149.40 SECONDARY: ---------- Focus: -265.80 Air Temp.: 10.1 Alt.: 29.999938 MIGS TONIGHT NOMINAL Axial A 1.7830 1.5390 Axial B 1.2920 1.0440 Axial C 1.3900 1.1590 Trans D -0.2140 -0.2020 GALILS Commanded: 1310403. 1292903. 1229445. -13900. -10000. Actual: 1284300. 1270100. 1193700. -13900. -10000. SETMIR VALUES SecDesOrient: 991.20 27.97 -10.00 -90.00 257.89 SecOrient: 1013.59 23.87 -10.20 -90.18 260.41 ---=== PROBLEMS IN DETAIL ===--- Weird logTool Behavior ====================== When I first fired up logTool today, before anyone had edited the log, none of the usual section headers were in place and I had to fill them in by hand. By "section headers", I mean e.g., column headings for the focus and offsets sections. I may have hit "load", while not intending to, when I started up logTool. Does this, as Atsuko suspects, load a blank template? Stuck Pin On instChange (And Other Altitude Weirdness) ====================================================== During the instChange to Cart 2, Plate 1913, the telescope evidently did not make it high enough in altitude to put the altitude locking pin in place, but it was VERY CLOSE. The pin went in partway and then stuck halfway between the two notches it can settle into (i.e., either fully in or fully out), requiring a lot of manual force to unseat it, though I don't think any damage was done to the pin itself. I checked the position display in the MCP at the telescope laptop and found it reading altitude as 89d57', yet there were no reported fiducial errors too large to correct around this time. Issued an instChange -cartridge from an iop session on the laptop at the telescope; this time, the altitude settled at 90d00'. The pin went in smoothly and we carried on. At 10:00Z when we put on Cartridge 1, the altitude brake would not clear upon completion of the instChange. Again, the position in the MCP was listed as 89d58'50" when I did the axis init at the telescope. We got some too large to correct fiducial errors in altitude both going up at instChange and coming down afterward. Ion Pump Pressure Critical Error ================================ We were warned earlier by French to be on the lookout for this warning because of damage to the ion pump cables sustained in yesterday's imager mismount situation. The damage consisted of exposing and partly removing the RF shielding around the wires. Around 08:40Z, we got a critical error reporting the ion pump pressure was nearing 3, with a nominal value of -1. The reported pressure continued to climb slowly. We consulted Jon Brinkmann by phone, who told us that we shouldn't really panic unless the pressure is spiking up to ~100, but a steady climb to 10 or 20 would be cause for concern. Toward 09:30Z the pressure readings began to ease off. TPM Errors ========== dewar (Imager Dewar Low Weight:: 2004-10-16 23:38:26Z) tracking (Excessive Az Tracking Error:: 2004-10-17 00:42:33Z) m2 mig (Communications Fault: 2004-10-17 00:02:54Z)