Date: Fri, 12 Nov 2004 12:44:21 GMT From: ank@apo.nmsu.edu (Atsuko Kleinman) Subject: 2.5m obslog 20041111 (MJD 53321) APACHE POINT OBSERVATORY SDSS 2.5M OBSERVING LOG Thursday November 11, 2004 (MJD 53321) ---=== OBSERVING TEAM ===--- Atsuko Nitta Howard Brewington Mike Harvanek (swing) SN day shift: Douglas Tucker (FNAL) Visitor: Matt, Helen, Sakura, Kiki, Nicki Schlegel ---=== OBSERVING PLAN ===--- Science! ---=== OBSERVING SUMMARY ===--- o Plate 1913 was called done. The S/N^2.48.6 achived before the plate expired. Jen --- is this ok? o 1962, 1910, 1927 (SDSS) done. o Goodsignal on 1551, no data on 2046, 1925. o Three weather pies today! ---=== OBSERVING LOG ===--- Afternoon: ---------- Spectro collimation was adjusted. See the Problems section for details. Windscreen touches during checkout and opening: altitude (Windscreen touched in altitude: UP (2004-11-11 23:23:57Z sdssmcp): 2004-11-11 23:24:04Z) and altitude (Windscreen touched in altitude: UP (2004-11-12 00:09:47Z sdssmcp): 2004-11-12 00:09:51Z) Nothing else to report. Night: ------ High cirrus. We start with spectro. Cart 8 Plate 1962 (SEGUE faint) ==================== Stars on gotoField! Yeahh! We used last night's offset. Seeing is good showing soe fibers with 0.98" FWHM. Started our science exposure 15min before twilight is over. With two exposures combined with previous exposures we finished this plate. Fiber 11 disabled because it was guigin on a hot pixel. The postCalib recommendation came in too late. Cart 7 Plate 1910 (SEGUE) ============================ guideStarsOngotoField. Fiber 1, 5 disbabled. These also seemed to be guiding on hot pixels. Fiber 8 as no guide stars (as expected). Many whopping fibers reported on this plate. Cart 2 Plate 1913 (SEGUE faint) ================================= Atsuko lost her mind. She put cart 1 on instead of cart2! She had to run back and get cart2. We lost 9min for this extra cartridge change. :( Guide stars on gotoField. THis plate is SEGUE faint. 1.3"seeing. Combined with the previous exposures, we got total of >48.6 before the plate expired. We are going to call this done. postCalib done. While going to instChange, we got too large to correct fiducial crossings in alt and rot but both were followed by reasonable corrections. Cart 5 Plate 1551 (lowz) ======================= Guide stars on gotoField. Seeing is slightly worse (2.1") now and more clouds are coming in too. Max accl error on rotator came up while we were taking the first science exposure. The exact watcher error message is in the PROBLEM section. During the 4th science exposure, the clouds started thicken and efficiency started to drop. :( We were not able to finish this plate. We did a postCalib as recommended by SoS. Cart 9 Plate 2046 ===================== We got too large to correct rotator error while gotofield, but it was followed by a valid correction so no problem. We used fk5 star which was in fiber 10. Thhe clouds are thickening which we think is why we did not see the guide stars on gotoField. 08:17Z Clouds thickened enough that we cann no longer see guide stars. 08:24Z Resuming science. This exposure did not make the s/n^2 of 2. :( The second exposure takein clouds also did not make the required min. s/n.Both of these exposures are declared bad. The plate expired, so we put a new plate on. cart 3 Plate 1927 (SDSS) =================== We had to fk5. Again we think this was due to clouds. The seeing is now about 2.5". With worse seeing and clouds, our efficiency is not very good either (~30%). 1st exposure (1500s) did make the min. s/n. :) Yeah! This plate was already half way done by previous exposures. So additional 2x1800s exposures finished it. cart 4 Plate 1925 (SDSS) ================== guideStarsOngotoField. The efficiency was less than 20%. We wait until it improves. We are fighting clouds. Rotator max accl. error occurred again while tracking. The error message is in the PROBLEM section. 30 min before twilight, we started a 30min exposure. The efficiency is around 30%. We have nothing to loose in trying... The s/2^2 caget tpm_TM_PMSSAvg tpm_TM_TelairAvg.VALA tpm_TM_PMSSAvg 4.71071 tpm_TM_TelairAvg.VALA 7.01 sp1> mechPiston 1461 NO ADJUSTMENT NEEDED FOR SP2 Final sp1 Coll_motor_A 4440 Coll_motor_B 8185 Coll_motor_C -7875 Final sp2 Coll_motor_A 8581 Coll_motor_B -3837 Coll_motor_C -6820 COLLIMATE: Mean offset = 0.07 pix COLLIMATE: Camera b1 appears to be IN-FOCUS (|mean| < 0.15 pix) COLLIMATE: Mean offset = 0.11 pix COLLIMATE: Camera b2 appears to be IN-FOCUS (|mean| < 0.15 pix) COLLIMATE: Mean offset = -0.07 pix COLLIMATE: Camera r1 appears to be IN-FOCUS (|mean| < 0.15 pix) COLLIMATE: Mean offset = -0.14 pix COLLIMATE: Camera r2 appears to be IN-FOCUS (|mean| < 0.15 pix) What is this? ================ failed to take semMEI: S objLib OBJ TIMEOUT (3997700) (2004-11-12 00:04:24Z sdssmcp) (failed to take semMEI: S_objLib_OBJ_TIMEOUT (3997700) (2004-11-12 00:04:24Z sdssmcp): 2004-11-12 00:04:34Z ) TPM ====== dewar (Imager Dewar Scale Communications Fault:: 2004-11-12 00:03:27Z) env temp (Excessive Return - Ambient Difference:: 2004-11-12 00:37:56Z) m2 mig (Communications Fault: 2004-11-12 00:08:53Z) Fiducial too large to crrect ============================== Both of the following happened while instChange. But they were followed by reasonabe corrections. altitude (correction for altitude -83583 is too large (2004-11-12 05:26:37Z sdssmcp): 2004-11-12 05:26:58Z ) rotator (correction for rotator 14739793 is too large (2004-11-12 05:26:38Z sdssmcp): 2004-11-12 05:26:58Z ) The folloing happened when we were going to field, but it was followed by valid corrections. rotator (correction for rotator -26426732 is too large (2004-11-12 07:50:24Z sdssmcp): 2004-11-12 07:50:43Z ) Max Acceleration errors ============================= This came up while we were just tracking and taking exposure. The closest command issued at the time the error occured is stickyOffsets for both times. ???????? We do not know why sticky Offsets should have anything to do with these errors???????? rotator (addoffset: Max accl. for rotator exceeded: -307/1000 (2004-11-12 05:54:31Z sdssmcp): 2004-11-12 05:54:44Z ) rotator (addoffset: Max accl. for rotator exceeded: -346/1000 (2004-11-12 11:32:30Z sdssmcp): 2004-11-12 11:32:40Z ) Altitude Windscreen touch error ================================= While moving the telescope up after the enclosure was on, altitude (Windscreen touched in altitude: UP (2004-11-12 12:12:31Z sdssmcp): 2004-11-12 12:12:54Z )