From: ank@apo.nmsu.edu Subject: 2.5m obslog (MJD51895) 20001216 Date: Sun, 17 Dec 2000 06:14:28 -0700 (MST) [mail to: obs-report-25m@apo.nmsu.edu include MJD in subject] Saturday Dec 16 2000 Apache Point Observatory SDSS 2.5m Observing Log (MJD 51895) OBSERVING TEAM: =============== Atsuko Nitta Kleinman (APO) Pete Newman (APO) Steph Snedden (APO) -- PT Alan Uomoto (JHU) -- PT VISITORS: ========= By Phone: Jim Gunn (PU) French Leger (FNAL/APO) Connie Rockosi (UC) THE PLAN: ========= Engineering and Spectro if possible SYNOPSIS FOR NIGHT: =================== We verified that M1 transverse actuators move, but the mirror does not move. TELESCOPE STATUS: ================= Opened:19:30 Closed:03:50 DIMM: ===== INTERLOCKS: =========== none bypassed SOFTWARE USED: ============== IOP/SOP: v3_23_2 Watcher: v2_8_9 MCP: v4_3_10 TPM: v2_1_6 AstroDa: 14_34 TCC: 2.4.1 WEATHER SYNOPSIS (see below for hourly data): ============================================= Beautiful night. PT reported good photometric night. GENERAL COMMENTS (see Problems below for details): ================================================== IMAGER : Jon B. took the pump off the camera around 5:30pm. We then took the imager off the telescope. It was in the dog house during the night and we were told to start the cooling process in the morning. We put the engineering camera in place of the imager on the telescope. We used the following command so that there was no email being sent off due to the critical errors. In the IOP server, type, im>set criticalErrorNotifyList "" To turn off the watcher from beeping about the imager status, type the following so that the watcher stops paying attention to the imager info in the murmur log. watcher>activeInstruments sp1 sp2 mt MIRROR PROBLEM: Carlos has worked on the M1 MIGs (D) during the day time. At the beginning of the night, the D MIG value was more like what we saw before, D=0.3840 (0.235 nominal value), but still off the nominal value (0.235 +-0.05). BTW, the M2 C MIG still is reading 0.0000. Jon B. checked the transverse servo position error voltage and found the the value as -0.9V. Since the telescope was at zenith when he checked, the transverse servo is not working much and this error value might not mean much at all. We know the MIG is reading reasonably because if we move the telescope in ALT, the MIG value changes. We homed and relaxed the primary at Alt=70 degrees. We then moved to 6 degrees and moved the transverse D in setmir to see if the mirror will move. We watched the GALIL move, but nothing happened to the MIG number. We rebooted the MIG controller and did the same excercise, but the MIG value did not change. We then measured the position and pressure error voltages and found position error volt=1.05 and pressure error voltage=0.05. If we cannot move the mirror in transverse, if we point the telescope, we should have a constant offset in ALT. We slwed to a very bright star, Aldebaran. The star did not appear on the eng cam image, but when we held a piece of paper along the camera instrument focal plane, we did find a donut. We had to apply many many offset commands to get the star on the camera. From the offset, we found the pointing was off by AZ=-0.025, ALT=0.036 degrees -- so the offset was no only in ALT. Jim, if you want to know how horrible the coma is, please look at, /data/scratch/ank/gimg0032.fits The donut looks like a fan (or a sea shell) with an off center hole. The donut is squashed in one direction. The best focus we got was at -725 --- the image looks like a comet with a fanned out tail rather than a point source. The instrument block for eng cam was set so that the focus for it would be 0 during the shake down few days ago. Our next target was Pollux (alpha Gem -- I think we got the right brother's name). We wanted to test if the pointing offset was constant. This star is not too far from Aldebaran and also as bright. So it should be easy for us to find it. When we slewed, we found the pointing was about 30 arcsec off in ALT. From the image of Pollux, we can see that the tail part has more than half of the light compared to the head/peak part of the image. The pointing being off and with the mirror not being in the right place in transverse explain why we were not able to find our field last night. With pointing being off, we anticipated hard time getting guide stars into the fibers. We also would not be able to get FWHM estimates because stars will appear as comets/sea shells. This means we will probably need to focus without the focus loop. We were not sure if we could use the guider loop either. And even with the guiding, it would take at least twice as many exposures as normal to get the s/n necessary to finish a plate. Therefore we decided not to try spectroscopy and do other non-observing tasks. We closed and took away the eng. camera so that we can get the imager out from the dog house. We then started the cooling of the imager process, following Jim's instruction draft sent to us this evening. Pete will send comments to Jim on the instruction. In 8 hrs or so (1pm or so), the imager should be ready to go. endNight -doTpm ran and finished. DATA ACQUISITION (see IOP/SOP output below): ============================================ IMAGING: -------- Run Type --- ---- SPECTROSCOPY: ------------- Exposure Type -------- ---- 7624 bias MIRRORS: ======== PRIMARY: -------- MIGS SHOULD BE Axial A=0.0509 0.0150 Axial B=-0.0549 -0.0510 Axial C=-0.0040 0.0030 Transverse D=-0.2370 0.2350 ---> this is what caused us grief Lateral E=1.8654 1.9100 Lateral F=0.4050 0.4095 GALILS Commanded:4890.,-2755.,465.,-6642.,8737.,8322 Actual: 4900., -2750., 450., -6650., 8750., 8300 SETMIR VALUES primDesOrient:0.00, -4.40, 10.70, 586.50, 240.70 primOrient:0.00, -4.56, 10.53, 586.58, 240.03 SECONDARY: ---------- Focus:-725 Temp:3.1 Altitude:74 MIGS Axial A=0.4950 Axial B=0.5649 Axial C=0.0000 --> no reading Transverse D=0.2389 GALILS Commanded:-724002.,-724002.,-724002.,10304.,11504 Actual: -723840., -724199., -723551., 10300., 11500 SETMIR VALUES secDesOrient:-575.33, 0.00, 0.00, 0.00, -336.95 secOrient:-575.22, -0.18, -0.08, -0.05, -336.73 FOCUS LOG: ========== M1 Piston M2 Piston Temp Wind Time Inst setmir TCC setmir Az Alt C Dir MPH filt FWHM " (rel) (abs) LN2 SCHEDULE: ============= Spectro forced filled at 4am. Spectro @ 104 Imager @ 220 PROBLEMS: ========= see General section WEATHER DATA: ============= Wind Time Temp F Dewp F MPH Direction Dust DIMM Sky Precip. 16:01 32 -12 19 1 (N) 159 clr 17:01 34 -11 11 1 (N) 140 clr 18:01 31 -10 16 349 (NNW) 212 clr 19:01 32 -2 15 6 (N) 232 clr 20:01 32 0 19 3 (N) 280 clr 21:01 33 0 15 0 (N) 277 clr 22:01 34 0 20 9 (N) 274 clr 23:01 32 0 15 17 (NNE) 257 clr 00:01 36 0 14 341 (NNW) 130 clr 01:01 36 -1 17 21 (NNE) 96 clr 02:01 36 0 13 12 (NNE) 81 clr 03:01 38 -1 3 1 (N) 44 clr 04:01 38 1 10 353 (N) 21 clr 05:01 39 1 16 316 (NW) 8 clr [pmt]cl = partly, mostly, totally cloudy DATA LOGS FROM IOP/SOP: =======================