APACHE POINT OBSERVATORY SDSS 2.5M OBSERVING LOG Tuesday August 15, 2006 (MJD 53963) ---=== OBSERVING TEAM ===--- Swing: Kaike Pan Night: Steph Snedden Dan Long Support: Craig Loomis French Leger Fritz Stauffer ---=== OBSERVING PLAN ===--- tests on spectrographs and Shakedown tasks ---=== OBSERVING SUMMARY ===--- More tests with the sparse-plugged plate that were not entirely conclusive - it's best to read the body of the log. ---=== OBSERVING LOG ===--- Afternoon: ========== We have new fiducial crossing data, and it looks useful. We will install new tables tomorrow afternoon. French rotated the red camera plus camera optics 180 degrees on spectrograph 1. This was in order to further diagnose the location of the source of the r1 flare. If the asymmetry flips 180 degrees as well, it points to the grating as the problem. If not, it points to the camera. Night: ====== Cartridge 4 with its sparse-plugged plate was mounted. A sequence of flats and arcs were taken and mailed to Craig. Craig then did some profiles through the arcs and compared them to the sparse-plug results before shutdown and from two days ago. Here is the text of an email exchange between Dan and Craig: From Dan: "Here's tonight's playlist: 40406 10s flat 40407 50s flat 40408 200s flat 40409 bias 40410 bias 40411 40s arc 40412 180s arc Comparing 40412 to 40376 (the 40s arc from two days ago) one can easily see i t is different and worse. Unfortunately one cannot say it is the same profile o r mirror imaged in order to say conclusively that it came from the camera or the central optics. However here's my take. The fact that it has changed so much in two days wou ld seem to indicate the oil. Steph also mentions that when looking at the camer a this afternoon she saw a different oil distribution (three vertical streaks), than that in the picture I took a couple weeks ago, a further indication of a ch anging system. The fact that there is now flare in all directions from the brigh ter arc dots is another indication it probably isn't the grating. Thoughts?" Craig replied: "Time to think and check some stuff more carefully. 1) The trails are definitely going to the left of the traces; before the camera was flipped the trails definitely went to the right of the traces. So the eff ect is _not_ coming from the camera, right? 2) The effect has otherwise changed dramatically since two days ago. Basically, the trail before the shutdown was ~30+ pixels long, was ~120 pixels long on 5 3961, and is now ~40 pixels long. And the structure has changed considerably since two days ago." ----- So, we have two different opinions here. It is true that the asymmetry did shift from right to left when the camera was rotated, which points the finger at the grating. However, it is also true that the profiles are not exactly the same shape, and visually the oil/cement/goo pattern on the lens was different. Dan would like to re-do the rotation tests without a large time lag between the flipping of the camera and the sparse-plug exposures, to minimize flow of the goo causing a change in the profile. No doubt there will be debate about the results tomorrow. ---------- We noticed the spectro and imager servers had died and would not restart. We wound up calling both Craig and Fritz for support. Says Craig: the device numbers/addresses were getting strange. Linux can't reuse the serial numbers and has a limit of two billion. It had reached the limit and had rolled over, starting to assign negative serial numbers. We rebooted sdsshost2 after we had finished sparse-plug plate exposures. After rebooting 'host2, MonX3 was unresponsive and was restarted. After the restart, we could not get the servers to start on MonX3, although they ran fine from Landru. When we tried to start the servers from MonX3 as observer on sdsshost2, we got an error message saying "unable to open font 7x13bold, trying fixed". We didn't see this on the landru session, so after Craig poked around a bit, we tried resetting MonX3 to different resolutions that mght include this font, without success. We left the servers running on MonXMike running as observer on sdsshost2, and we had no problems starting them. We will check with Fritz or Jon tomorrow about this. endNight finished. ---=== IMAGING RUN SUMMARY ===--- Run Time Stripe Lambda Last Flavor Comments Start End Begin End Frame ------------------------------------------------------------------------- 6252 22:24Z 22:45Z 100 N 9.47 14.56 48 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):n QA Procedures Done (y/n):y UT Exp Time flavor comment (S/N)^2 totals ========================================== b1 r1 b2 r2 22:40 40398 0.0 bias 23:42 40399 0.0 bias 23:53 40400 0.0 bias 00:07 40401 0.0 bias 02:25 40406 10.0 flat 02:34 40407 50.0 flat 02:40 40408 200.0 flat 02:43 40409 0.0 bias 02:48 40410 0.0 bias 02:52 40411 40.0 arc 02:58 40412 200.0 arc ---=== TELESCOPE OFFSETS AND SCALE I ===--- Time Instrument Az Alt Rot Scale pos offset pos offset pos offset ------------------------------------------------------------------------------ ---=== TELESCOPE OFFSETS AND SCALE II ===--- ---=== FOCUS LOG ===--- setmir piston Temp Wind Time Inst scale M1 M2 Foc Az Alt (C) MPH Dir filt fwhm ------------------------------------------------------------------------------ ---=== WEATHER LOG ===--- Wind Time Temp F Dewp F MPH Direction Dust DIMM Sky 22:32Z 57 54 7 237 (WSW) 344 - Cloudy 23:03Z 55 54 9 245 (WSW) 285 - ' 23:34Z 54 54 0 234 (SW) 13992 - ' 00:05Z 54 53 1 196 (SSW) 339 - ' 00:35Z 55 51 2 191 (S) 363 - ' 01:18Z 54 50 4 185 (S) 408 - ' 02:54Z 54 47 8 181 (S) 226 - ' 08:25Z 52 52 9 208 (SSW) 48232 - ' 08:57Z 51 52 7 183 (S) 3246 - ' 09:29Z 51 51 5 185 (S) 258 - ' 10:01Z 51 51 8 174 (S) 295 - ' ---=== TELESCOPE STATUS ===--- Telescope stowed at zenith with cartridge 4 mounted and spectro autofill connected. Cartridge 5 and the cart are in the enclosure. The nose of the telescope is covered with a tarp to keep leaks off the telescope. THE TELESCOPE SHOULD NOT BE MOVED WITHOUT CONSULTING FRENCH. 10:40Z - Spectro dewar weight: 264 lb 10:40Z - Imager dewar weight: 202 lb ---=== SOFTWARE USED ===--- IOP/SOP: v4_25_0 Watcher: v2_34_0 MCP: v6_3_2 TPM: tpm_v3_3_0 AstroDa: v15_12_1 TCC: TCC 2.7.2.1 August 6 2004 sdssProcedures: v2_18 SoS: v5_1_4 hoggPT: v1_6_9 plate-mapper: v4_3_1 ---=== MIRROR NUMBERS ===--- Telescope is at zenith and can't be moved, therefore there are no mirror numbers today. ---=== PROBLEMS IN DETAIL ===---