Subject: 2.5 m obs log 20000509 (mjd 51674) Date: Wed, 10 May 2000 05:33:01 -0600 (MDT) From: hayes@apo.nmsu.edu (Jeffrey Hayes) [mail to: obs-report-25m@apo.nmsu.edu include MJD in subject] Tuesday May 09 2000 Apache Point Observatory SDSS 2.5m Observing Log (MJD 51674) OBSERVING TEAM: =============== Jeffrey Hayes (APO) - shift 2 Ellyne Kinney (APO) - shift 2 Dan Long (APO) - pointing model Steph Snedden (APO) - pointing model Eric Neilsen (JHU) PT VISITORS: ========= Richard Kron (UC) THE PLAN: ========= After 02:00 imaging. SYNOPSIS FOR NIGHT: =================== Dan and Steph did a 70 point pointing model tonight. While setting the fiducials, the MCP had problems. It threw the altitude brake on for no obvious reason twice, the displayed a completely erroneous value for the altitude. Dan tried forcing the altitude to that of the clinometer, and tried to move, but the MCP would stop and show an"*EB*" in the status display (and put on the brake). The MCP was rebooted and this fixed the problem. The fiducials were then reset. Is this an MCP or MEI problem? We aren't sure. The MCP version used was v4_2_4. We paused the pointing model every 12 points so that the fiducials could be reset. We have seen evidence of cumulative errors in elevation, so re-fiducializing during the pointing model seemed to be the right thing to do. The first time we reset the fiducials, there was a 10" difference in elevation! The remaining times, the differences in elevation ranged from 2" to 5". Azimuth was always under 4". The results of the model: coeff change value sigma 1 IE +0.006 -149.88 1.199 2 IA +0.011 -216.26 1.319 3 AN +0.000 -3.38 0.419 4 AW +0.002 -57.67 0.408 5 HWCA2 +0.000 -0.83 0.520 6 HWSA2 +0.000 -0.25 0.561 7 HNCA1 -0.001 +0.18 0.619 8 HNSA1 +0.000 -0.77 0.615 9 CA -0.014 +17.14 0.964 10 PZZ1 +0.001 -142.57 4.415 11 ACEC -0.002 -0.71 0.763 12 ACES +0.000 -2.45 0.783 13 TX +0.000 -1.92 2.245 2.2487" (RMS) +- 2.49" We checked the model by going to a few stars and looking at the calibration offsets. The largest was 5", and that was at an altitude greater than 80 degrees. The rest were under 2". In some cases, errors were only a few tenths of an arcsec. Dan commented that this was the best pointing performance he had seen on this telescope. How long will it last? We should keep on recording our skyGang errors and spectro offsets to answer this. This cumulative error in altitude, necessitating resetting the fiducials, is worrisome and needs to be dealt with immediately if not sooner. Is this what is causing the problems when imaging at high survey latitude? One other item: The seeing was awesome while we were doing the pointing model. For anyone interested in looking at a subarcsecond image (undersampled) from the engineering camera, one can be found on sdsshost in /usrdevel/snedden/dot.fits At 00:45 we swapped out the engineering camera for the imager. The eng. camera is on a dolly in the support bldg. Initial imaging was on FASTT K, and at roughly 02:35 we went to 12,S for the rest of the night. Decent seeing (about 1.3'' typically). endNight was run successfully. NOTE: The cart for moving the 180L dewars was NOT around, so we could NOT change the spectro dewar. This will have to be done by the daytime folk. TELESCOPE STATUS: ================= Imager left on the telscope. At ALT=30 degrees. DIMM: ----- Open and reporting 1.5'' seeing. INTERLOCKS: =========== None bypassed. SOFTWARE USED: ============== IOP/SOP: v3_13_1branch_1 Watcher: v2_8_2 MCP: v4_2_4 TPM: v1_0_8 AstroDa: 14_24 TCC: 2.2.5 WEATHER SYNOPSIS (see below for hourly data): ============================================= Photometric. GENERAL COMMENTS (see Problems below for details): ================================================== We started off by doing FASTT K, and then 12,S. Nice night. endNight was run successfully. DATA ACQUISITION (see IOP/SOP output below): =========================================== IMAGING: -------- Run Type --- ---- 1474 bias 8-20 1475 bias 8-21 1476 bias 8 -- mistake 1477 FASTT K -- 8-15 focus set up 16-22 +300 out of focus for JEG 23-50 lskips of various sizes: 51-107 science lambda=43-51 1478 12,S -- 8-16 lskips 17-231 science from lambda=25-57 SPECTROSCOPY: ------------- Exposure Type -------- ---- TAPES TO SHIP: JL 2756 through 2761 and JL 2762. ============== MIRRORS ======== PRIMARY: -------- MIGS SHOULD BE Axial A= 1.9279 1.9284 Axial B= 0.5589 0.5594 Axial C= 0.5579 0.5579 Transverse D= 0.3739 0.3744 Lateral E= 1.9070 1.9065 Lateral F= 0.4069 0.4074 SECONDARY: ---------- Focus: -450.00 Temp: 13.4C Altitude: 55. MIGS Axial A= 0.6209 Axial B= 0.6549 Axial C= 0.6449 Transverse D= 0.0149 FOCUS LOG: ========== M1 Piston M2 Piston Temp Wind Time Inst setmir TCC setmir Az Alt C Dir MPH filt FWHM " 02:50 IMG -420 55 13.7 SW 15 23-i 1.5 LN2 SCHEDULE: ============= Spectro dewars were NOT filled because someone took the cart for moving the 180L dewars, and *we* are not moving them by hand. Imager dewar did not need to be swapped. PROBLEMS: ========= WEATHER DATA: ============= Wind Time Temp F Dewp F MPH Direction Dust DIMM Sky Precip. 00:01 56 25 17 214 (SW) 1860 1.5 clr 01:01 56 25 18 215 (SW) 1724 1.5 clr 02:01 56 25 19 212 (SSW) 1671 1.7 clr 03:01 55 24 14 227 (SW) 1813 2.0 clr 04:01 54 24 15 227 (SW) 1913 1.8 clr [pmt]cl = partly, mostly, totally cloudy DATA LOGS FROM IOP/SOP: ======================= runlog-1477.txt MJD: 51674 Run: 1477 STRIPE: 10O This scan ran for 105 frames. Beginning: RA: 222.04 DEC: 0.00 LAM: 37.04 ETA: -32.50 MU: 222.04 NU: 0.00 End: RA: 237.52 DEC: 0.00 LAM: 52.52 ETA: -32.50 MU: 237.52 NU: 0.00 All-sky camera frames: median lead-trail Dx = sd = Dy = sd = Chip median seeing worst frames median sky median bias median seeing sd seeing fwhm>1.5" sky sd bias sd noise o1 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 o2 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 o3 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 o4 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 o5 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 l1 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 l2 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 l3 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 l4 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 l5 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 l6 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 r1 1.26 0.57 1.86 8 145.3 8.1 1788.9 0.10 r2 1.24 0.53 1.82 9 140.6 8.3 1038.3 0.06 r3 1.17 0.55 1.65 5 147.8 9.5 1832.0 0.17 r4 1.19 0.56 1.72 6 137.1 8.5 1080.3 0.05 r5 1.27 0.57 1.82 9 140.8 8.8 1102.1 0.07 r6 1.42 0.61 2.01 22 132.8 8.3 1196.8 0.17 i1 1.27 0.57 1.82 7 222.6 7.7 1176.4 0.12 i2 1.17 0.51 1.76 6 195.1 7.4 1173.5 0.10 i3 1.13 0.54 1.63 5 237.7 9.6 1173.2 0.08 i4 1.15 0.53 2.65 6 234.2 9.0 1039.9 0.07 i5 1.24 0.51 2.95 9 226.1 8.5 1844.7 0.25 i6 1.45 0.57 2.05 27 221.9 8.1 1079.7 0.07 u1 1.54 0.59 2.42 69 31.1 2.0 1107.5 0.07 u2 1.53 0.56 3.02 64 25.3 1.7 1479.2 0.36 u3 1.45 0.54 3.01 33 26.6 1.8 1198.1 0.12 u4 1.41 0.53 2.75 26 26.6 1.8 1314.9 0.39 u5 1.40 0.53 2.72 22 32.0 2.1 1114.2 0.06 u6 1.43 0.42 2.51 25 20.6 1.3 1302.8 0.12 z1 1.39 0.60 2.03 12 144.3 5.4 1148.1 0.13 z2 1.26 0.57 1.86 8 148.4 5.7 1061.2 0.10 z3 1.18 0.55 1.72 5 128.0 4.8 1047.5 0.06 z4 1.16 0.55 1.80 4 124.4 4.8 1053.6 0.07 z5 1.28 0.48 1.83 9 195.9 7.2 1040.3 0.07 z6 1.45 0.61 2.07 25 131.7 4.8 1045.2 0.08 g1 1.43 0.61 1.93 27 91.6 12.1 1596.0 0.20 g2 1.39 0.60 1.88 19 76.8 10.4 1105.2 0.05 g3 1.35 0.59 1.91 11 78.4 11.0 1140.8 0.05 g4 1.33 0.59 1.85 15 77.2 10.8 1223.3 0.10 g5 1.37 0.71 1.96 15 71.0 121.1 1164.9 0.08 g6 1.38 0.57 2.86 19 73.9 10.4 1209.4 0.11 t1 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 t2 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 t3 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 t4 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 t5 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 t6 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 s1 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 s2 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 s3 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 s4 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 s5 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 runlog-1478.txt MJD: 51674 Run: 1478 STRIPE: 12S This scan ran for 229 frames. Beginning: RA: 208.62 DEC: 4.58 LAM: 23.54 ETA: -27.50 MU: 208.54 NU: 0.00 End: RA: 81.05 DEC: -1.21 LAM: -104.00 ETA: -27.50 MU: -9999.00 NU: 0.00 All-sky camera frames: median lead-trail Dx = sd = Dy = sd = Chip median seeing worst frames median sky median bias median seeing sd seeing fwhm>1.5" sky sd bias sd noise o1 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 o2 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 o3 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 o4 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 o5 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 l1 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 l2 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 l3 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 l4 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 l5 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 l6 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 r1 1.32 0.19 1.66 16 164.5 2.6 1789.2 0.20 r2 1.34 0.11 1.77 17 160.3 2.3 1038.5 0.11 r3 1.30 0.19 1.79 16 170.9 2.4 1832.5 0.27 r4 1.35 0.19 1.66 24 157.5 2.3 1080.4 0.09 r5 1.41 0.10 2.06 44 161.8 2.3 1102.4 0.14 r6 1.56 0.11 2.01 173 153.4 2.1 1197.6 0.31 i1 1.30 0.18 1.60 11 225.1 7.9 1176.8 0.23 i2 1.23 0.18 1.58 3 197.4 6.8 1173.8 0.16 i3 1.23 0.11 1.67 5 240.5 8.3 1173.4 0.13 i4 1.28 0.18 1.59 9 237.1 8.1 1040.1 0.12 i5 1.37 0.19 1.96 22 227.9 7.8 1845.5 0.39 i6 1.54 0.10 2.20 159 223.5 7.7 1079.9 0.11 u1 1.74 0.11 2.09 222 37.4 2.9 1107.6 0.14 u2 1.70 0.12 2.07 219 28.2 1.4 1477.5 0.86 u3 1.60 0.12 1.96 183 29.8 1.4 1198.3 0.29 u4 1.56 0.13 1.99 160 29.8 1.4 1313.0 0.78 u5 1.54 0.12 1.92 149 37.9 2.6 1114.2 0.07 u6 1.59 0.12 1.99 183 22.9 1.1 1302.2 0.29 z1 1.46 0.09 1.70 57 147.6 6.1 1148.5 0.24 z2 1.38 0.09 1.79 24 151.3 6.7 1061.4 0.09 z3 1.30 0.18 1.56 4 130.4 5.6 1047.5 0.07 z4 1.27 0.18 1.52 5 127.2 5.4 1053.6 0.09 z5 1.30 0.10 1.89 10 199.3 8.0 1040.4 0.06 z6 1.41 0.09 1.95 32 134.5 5.4 1045.4 0.10 g1 1.62 0.10 1.93 197 100.1 4.1 1594.9 0.38 g2 1.54 0.10 1.87 141 84.6 3.5 1105.0 0.08 g3 1.51 0.11 1.85 125 86.7 3.4 1140.7 0.06 g4 1.50 0.11 1.84 107 85.7 3.5 1223.6 0.11 g5 1.50 0.11 2.00 114 78.9 3.5 1165.1 0.08 g6 1.51 0.11 1.84 113 82.0 3.4 1209.8 0.14 t1 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 t2 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 t3 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 t4 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 t5 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 t6 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 s1 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 s2 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 s3 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 s4 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00 s5 -1.00 0.00 -1.00 0 -1.0 0.0 -1.0 0.00