Date: Mon, 12 Sep 2005 12:24:23 -0600 (MDT) From: Jurek Krzesinski Subject: Re: 2.5m obslog 20050911 (MJD 53625): File ownership Jim, I'm pretty sure that focus*.par file was the only one at that time with your ownership, but I'll watch that more carefuly next time. Jurek On Mon, 12 Sep 2005, jegunn wrote: > > I think we have a bug or worse somewhere. Did you check whether other > files had the wrong ownership? (they do not now.) I logged in > last night to check on the spectrographs after the no-response > error and started a *SOP* session, but that was four hours before > the file ownership incident, and I logged out immediately thereafter. > I was not on the system when the system tried to write to the focus,par > file that was somehow owned by me. > > Eric, when I start sop or iop both complain about the order of items in my > group membership (jeg is first, but sdss should be, it claims....it > magnanimously lets me on anyway). Might this be related? I don't quite > know how, since it was certainly not my iop session which was trying to > write this file, but God alone knows what the code actually *does*. The > fact that the group membership order might make any difference at all > makes it slightly suspicious that some less than salubrious tcl shortcut > was taken somewhere. > > I have filed a PR against iop. > > --jim > > > On Mon, 12 Sep 2005 observer@sdsshost2.apo.nmsu.edu wrote: > > > > > APACHE POINT OBSERVATORY SDSS 2.5M > > > > OBSERVING LOG > > Sunday September 11, 2005 > > > > (MJD 53625) > > > > ---=== OBSERVING TEAM ===--- > > > > swing: Jurek Krzesinksi > > night: Mike Harvanek, John Barentine > > Rick Kessler (Mr. SN) > > support: Connie Rockosi (by phone) > > visitor: Brigitte Kessler > > > > ---=== OBSERVING PLAN ===--- > > > > Science! > > > > ---=== OBSERVING SUMMARY ===--- > > > > We've got a file owner problem and NFS problem this afternoon. See the > > Afternoon checkout. > > > > We imaged 82 S for 324 frames from lambda +110.5 to +157.8 (ramps included) > > in excellent seeing and photometric conditions but with some moon. Note > > that skippy doesn't give reliable values for SN scans unless lambda is > > greater than about +116. > > > > We imaged 79 S for around 180 good frames (frame 9 to 188, lambda +158.6 to > > -174.5, ramps included). This portion of the drift was obtained in excellent > > seeing and photometric conditons with no moon. The remainder of the drift > > (the last 25 frames) was taken in clouds. > > > > It was photometric from about 02:40Z to 08:18Z. The rest of the night was > > lost to clouds. > > > > Tonight was some of the best seeing we've ever had. Watcher was complaining > > that the seeing was too good (0.74"). At one point we counted 22 chips with > > sub arcsecond seeing. > > > > sp1 appeared to lose a power supply but it turned out that it was probably > > just a communication glitch. > > > > The dimm computer needed to be power cycled before it was brought up. We > > got it working before twilight ended. The seeing values did not show up on > > the web page until very late (about 10:00Z). > > > > We put compressor #2 back on-line at 10:50Z. > > > > ---=== OBSERVING LOG ===--- > > > > Afternoon checkout: > > ------------------- > > When trying to end the drift I got a strange error: > > im> endDrift > > 2005-09-11 23:46:45Z: Error stopping focus loop: couldn't open > > "/astrolog/53625/focus-53625.par": Permission denied > > 2005-09-11 23:46:52Z: stopping drift with: iccExec id1 id2 id3 id4 id5 id6 ad1 > > ad2 ad3 ad4 readoutEnd > > > > Why? Who owns the focus*.par file? > > > > -rw-rw-r-- 1 jeg jeg 713 Sep 11 18:08 focus-53625.par > > aHa! :)))) > > > > All right, let's change the owner to observer.dss and see: > > im> endDrift > > 2005-09-12 01:26:13Z: stopping drift with: iccExec id1 id2 id3 id4 id5 id6 ad1 > > ad2 ad3 ad4 readoutEnd > > 2005-09-12 01:26:47Z: closed shutters > > 2005-09-12 01:26:47Z: endData completed > > Flavor of this run > > (science, bias, calibration, engineering, ignore, help) [bias]: ignore > > > > No error message :). Problem fixed. > > > > ------------------------------------------- > > > > Then when trying to load a plate I've got the error: > > sp1> loadC 5 2256 > > /home/neilsen/iop/params/cartridgeInfo.par > > I did not find any plugMap files matching plPlugMapM-2256*par > > sp1> loadC 4 2258 > > /home/neilsen/iop/params/cartridgeInfo.par > > I did not find any plugMap files matching plPlugMapM-2258*par > > > > sp1> tb > > Can't retrieve schema for GPROBE > > while executing > > "schemaGetFromType GPROBE" > > > > TB doesn't konw what's going on, that is aparently the NFS problem! > > > > I didn't see /sdssfiles1 directory mounted on host2, it's gone??? Well I ssh > > to sdssfiles1, then went to the /data/spectro directory and did: ls -l. > > and were able to load the plate. > > > > ------------------------------------------- > > > > Spectrograps checked with bias and are in focus, guider works, imager bias > > taken, the telescope is ready. > > > > Night: > > ------ > > High humidity delayed opening so we took an on-telescope bias (run 5595) in > > the closed up, darkened enclosure. > > > > The archiver started complaining early and often. Along with complaints > > of no gang transfer (on a bias) we got multiple warnings of > > > > dsc E archWrFail Error archiving frame 5595 34.32: Failed to close file 13 > > (dsc_E_archWrFail Error archiving frame 5595 34.32: Failed to close file 13 : > > 2005-09-12 02:02:48Z ) > > > > and > > > > TEXTONLY *** FATAL *** dscArch: While writing frames - 1 > > (TEXTONLY *** FATAL *** dscArch: While writing frames - 1 : > > 2005-09-12 02:02:48Z ) > > > > The humidity was in the upper 70s but stable so we decided to open. > > However, clouds rolled in so we just opened the enclosure doors and > > started ventilating again. The clouds cleared and we opened around 02:40Z. > > > > The Dimm computer was frozen. Cycling the power on the computer solved > > the problem. > > > > We began with supernova imaging because the moon was up. The first attempt > > at 82 S (run 5596) was not good because the az axis aborted for unknown > > reasons: azimuth (ABORT_EVENT: 2005-09-12 03:09:34Z) > > > > Run 5597: 82 S. Good from the beginning (frame 9, lambda +110.5). Seeing is > > sub arcsecond and the sky is photometric. Note that skippy has problems at > > the beginning of the supernova scans (up until lambda of about +116). The > > symptoms are that skippy will give good (in-spec) values on 1 frame and bad > > values on the next. However, the number of stars it uses in the solution > > is usually low (maybe 5 or less) and so the values it returns cannot be > > trusted. We believe this occurs because the catalog skippy uses is sparse > > in this area. This means that the observers cannot get a reliable estimate > > of the pointing on SN scans until lambda is greater than about +116. > > Fortunately, skippy reported the pointing was good when we got to the area > > that could be trusted. This run was good from beginning to end (frame 9 to > > 324; lambda +110.5 to +157.8; includes ramps). The entire run was photometric > > and had excellent seeing, much of it sub arcsecond. After endNight completed, > > we ran the field link script and the spooling script. Both appeared to be > > successful. The spooling script said it could process 702 frames. > > > > sp1 gave us a scare. Watcher threw a "no reply (.CAM: 2005-09-12 04:08:55Z)" > > followed by voltage errors for ccd01 in vs-, i-trim1 and vsw-. A critical > > error alert followed. We called Connie and she suspected a failed power > > supply. We tried to "cc ping" sp1 in sop but there was no reply. We > > went down to check the power supplies but they were all functioning. We > > checked all 4 spectro power supplies (red and blue for both sp1 and sp2) > > but could find nothing wrong. Connie then suggested we check the ethernet > > connection for sp1 and it looked fine too. While checking the ethernet > > connection we checked all the sp1 connections that we could see. Everything > > appeared to be normal. sp1 appeared to be fine. We did another "cc ping" to > > sp1 from the same sop window and it answered "PING". sp1 had apparently > > healed itself. Connie believes it was a communications glitch whereby > > nothing could talk to sp1 for a while. Connie filed a bug report. > > > > Watcher spit out the following warnings: > > AxisStat:alt (clock_loss_signal: 2005-09-12 06:08:43Z) > > AxisStat:az (clock_loss_signal: 2005-09-12 06:08:43Z) > > AxisStat:rot (clock_loss_signal: 2005-09-12 06:08:43Z) > > and more like it with later time stamps. > > > > The moon set around 06:20Z and since it was photometric with good seeing we > > ended the SN scan and started a segue drift. > > > > Run 5598: Segue 79 S. Good from the beginning (frame 9, lambda +158.6). > > Some of the best seeing we've ever had. We counted 22 chips with sub > > arcsecond seeing at one point. Watcher actually complained that the > > seeing was too good: fwhm (06:43:01Z 2005-09-12 ccd43:) Sorry Robert. > > There was a glitch in the photometricity reported by the cloud camera > > between 07:07Z and 07:15Z in the northeast. The cloud camera frames for > > this time period were inspected and the nature of the glitch was probably > > clouds. Regardless, we were pointed just a little east of due south and > > even if they were clouds, they were nowhere near us. Clouds did arrive at > > 08:18Z though (around frame 188, lambda -174.5). We continued the drift > > for another 25 frames in the hope that the clouds would go away but they > > increased. We ended the drift at frame 213, lambda -170.7 and tried > > another supernova scan. However, the clouds were so thick by this time > > that we got nothing. We closed around 09:20Z due to threatening clouds > > and never reopened. > > > > The seeing values from the dimm were very late showing up on the web page. > > They didn't arrive until approximately 10:00Z. Not sure what caused this. > > > > We put compressor #2 back on-line at 10:50Z. > > > > endNight completed successfully. > > > > ---=== IMAGING RUN SUMMARY ===--- > > > > Run Time Stripe Lambda Last Flavor Comments > > Start End Begin End Frame > > ------------------------------------------------------------------------- > > 5592 23:25Z 23:47Z 100 O 51.46 57.10 52 ignore > > 5593 23:50Z 00:20Z 100 O 57.82 65.25 63 ignore > > 5594 01:22Z 01:26Z 100 O 80.78 82.00 22 ignore > > 5595 01:43Z 02:10Z 100 O 86.27 92.96 58 bias on-telescope > > 5596 03:08Z 03:16Z 82 S 110.38 112.40 26 ignore az axis abort > > 5597 03:17Z 06:28Z 82 S 110.32 157.98 332 science SN; all good > > 5598 06:30Z 08:35Z 79 S 158.33 -170.32 222 science good to -174.5 > > 5599 08:38Z 08:46Z 82 S -163.63 -161.52 28 science ignore - clouds > > > > ---=== IMAGING RUN DETAILS ===--- > > > > See the main log. > > > > ---=== SKIPPY RESULTS ===--- > > > > Run Frame nFrames stars muErr muRms nuErr nuRms rot az el > > --------------------------------------------------------------------------- > > 5597 44 4 5 38.200 1.078 -14.200 2.954 -0.27705 179 57 > > 5597 97 4 93 0.200 0.138 -1.900 0.136 0.00376 179 57 > > 5597 125 4 106 0.300 0.109 -1.900 0.103 0.00324 179 57 > > 5597 149 4 87 0.400 0.166 -2.100 0.121 0.00381 179 57 > > 5597 201 4 63 0.500 0.141 -2.300 0.129 0.00394 179 57 > > 5597 253 4 52 0.700 0.152 -2.400 0.160 0.00350 179 57 > > 5597 279 4 58 0.600 0.128 -2.500 0.117 0.00373 179 57 > > 5597 307 4 61 0.500 0.141 -2.500 0.105 0.00396 179 57 > > 5597 312 4 54 0.700 0.122 -2.500 0.106 0.00359 179 57 > > 5598 26 4 45 0.600 0.120 -1.000 0.123 0.00815 180 64 > > 5598 78 4 34 0.300 0.093 -1.200 0.112 0.00904 180 65 > > 5598 108 4 36 0.300 0.158 -1.100 0.133 0.00942 180 65 > > 5598 128 4 41 0.000 0.365 -1.200 0.131 0.00991 180 65 > > 5598 180 4 45 0.200 0.372 -1.300 0.345 0.00860 180 65 > > 5599 16 4 40 -0.100 0.121 -0.300 0.172 0.00369 169 57 > > > > ---=== LTMATCH RESULTS ===--- > > > > Run Field nFields alt az nGood rowMean rowSig colMean colSig rot > > ------------------------------------------------------------------------ > > 5597 54 1 57 1 72 -1.911 0.134 -0.871 0.135 0.00293 > > 5597 54 1 57 1 49 -1.521 0.109 -0.659 0.147 0.00221 > > 5597 54 1 57 1 78 -1.221 0.198 -0.448 0.237 0.00151 > > 5597 54 1 57 1 79 -0.976 0.153 -0.207 0.180 0.00069 > > 5597 54 1 57 1 71 -0.639 0.146 -0.175 0.159 0.00059 > > 5597 72 1 57 1 67 -1.299 0.143 -1.740 0.126 0.00585 > > 5597 72 1 57 1 70 -0.888 0.145 -1.522 0.131 0.00512 > > 5597 72 1 57 1 75 -0.462 0.176 -1.392 0.196 0.00468 > > 5597 72 1 57 1 75 -0.168 0.103 -1.190 0.129 0.00400 > > 5597 72 1 57 1 75 0.040 0.170 -1.069 0.156 0.00359 > > 5597 107 1 57 1 79 -0.696 0.100 -1.093 0.174 0.00367 > > 5597 107 1 57 1 68 -0.285 0.077 -0.901 0.187 0.00303 > > 5597 107 1 57 1 75 0.155 0.106 -0.775 0.170 0.00260 > > 5597 107 1 57 1 82 0.508 0.123 -0.782 0.155 0.00263 > > 5597 107 1 57 1 74 0.827 0.113 -0.719 0.130 0.00242 > > 5597 124 1 57 1 79 -1.495 0.172 -1.416 0.166 0.00476 > > 5597 124 1 57 1 81 -1.112 0.215 -1.287 0.174 0.00433 > > 5597 124 1 57 1 75 -0.789 0.225 -1.128 0.189 0.00379 > > 5597 124 1 57 1 75 -0.453 0.205 -1.159 0.139 0.00390 > > 5597 124 1 57 1 78 -0.164 0.176 -1.088 0.212 0.00366 > > 5597 160 1 57 1 54 -0.808 0.125 -1.431 0.082 0.00481 > > 5597 160 1 57 1 49 -0.396 0.110 -1.235 0.092 0.00415 > > 5597 160 1 57 1 61 0.094 0.125 -1.065 0.143 0.00358 > > 5597 160 1 57 1 45 0.327 0.157 -0.931 0.150 0.00313 > > 5597 160 1 57 1 62 0.590 0.139 -0.788 0.113 0.00265 > > 5597 176 1 57 1 60 -0.976 0.121 -1.418 0.119 0.00477 > > 5597 176 1 57 1 34 -0.562 0.078 -1.284 0.087 0.00432 > > 5597 176 1 57 1 68 -0.174 0.095 -1.080 0.133 0.00363 > > 5597 176 1 57 1 54 0.128 0.101 -0.909 0.129 0.00306 > > 5597 176 1 57 1 46 0.450 0.112 -0.983 0.119 0.00330 > > 5597 212 1 57 1 36 -0.617 0.135 -1.376 0.129 0.00463 > > 5597 212 1 57 1 38 -0.168 0.112 -1.227 0.128 0.00412 > > 5597 212 1 57 1 34 0.237 0.124 -0.981 0.115 0.00330 > > 5597 212 1 57 1 36 0.529 0.134 -0.866 0.091 0.00291 > > 5597 212 1 57 1 44 0.783 0.155 -0.715 0.122 0.00240 > > 5597 229 1 57 1 27 -0.461 0.129 -1.624 0.139 0.00546 > > 5597 229 1 57 1 34 -0.065 0.088 -1.405 0.116 0.00472 > > 5597 229 1 57 1 37 0.310 0.166 -1.118 0.198 0.00376 > > 5597 229 1 57 1 42 0.527 0.139 -0.931 0.241 0.00313 > > 5597 229 1 57 1 43 0.795 0.093 -0.871 0.147 0.00293 > > 5597 264 1 57 1 32 -0.943 0.154 -1.348 0.109 0.00453 > > 5597 264 1 57 1 22 -0.664 0.144 -0.978 0.100 0.00329 > > 5597 264 1 57 1 31 -0.217 0.179 -0.805 0.143 0.00270 > > 5597 264 1 57 1 29 0.098 0.167 -0.683 0.090 0.00230 > > 5597 264 1 57 1 28 0.328 0.148 -0.561 0.102 0.00189 > > 5597 282 1 57 1 16 -0.819 0.135 -1.119 0.181 0.00376 > > 5597 282 1 57 1 24 -0.436 0.091 -0.927 0.206 0.00312 > > 5597 282 1 57 1 36 0.022 0.095 -0.870 0.189 0.00293 > > 5597 282 1 57 1 24 0.269 0.117 -0.646 0.200 0.00217 > > 5597 282 1 57 1 29 0.540 0.117 -0.621 0.198 0.00209 > > > > ---=== SPECTROSCOPY DATA SUMMARY ===--- > > > > Summary Checked (y/n): YES > > QA Procedures Done (y/n): NO > > > > UT Exp Time flavor comment (S/N)^2 totals > > ========================================== b1 r1 b2 r2 > > 23:53 33937 0.0 bias > > 23:57 33938 0.0 bias > > ----- sequence 33939, plate 2256 ------- > > 00:23 33939 0.0 bias > > 00:36 33940 10.0 flat > > 00:38 33941 2.0 arc > > 00:41 33942 2.1 arc > > 00:44 33943 2.1 arc > > ----- sequence 33944, plate -9999 ------- > > 01:11 33944 0.0 bias > > ----- sequence 33945, plate 2256 ------- > > 06:10 33945 0.0 bias test after communications glitch > > > > ---=== TELESCOPE OFFSETS AND SCALE I ===--- > > > > Time Instrument Az Alt Rot Scale > > pos offset pos offset pos offset > > ------------------------------------------------------------------------------ > > 05:30Z imager 0.89 0.0000 57.13 0.0000 90.52 0.0000 1.000000 > > 07:41Z imager 0.29 0.0000 64.61 0.0000 89.50 0.0000 1.000000 > > > > ---=== TELESCOPE OFFSETS AND SCALE II ===--- > > > > ---=== DATA TAPE SUMMARY ===--- > > > > Goes: JL > > Stays: JL > > > > ---=== FOCUS LOG ===--- > > > > setmir piston Temp Wind > > Time Inst scale M1 M2 Foc Az Alt (C) MPH Dir filt fwhm > > ------------------------------------------------------------------------------ > > 03:27Z imager 1.00000 0 -381 -275 1 57.1 12.2 8 243 i-23 0.9" > > 04:27Z imager 1.00000 0 -391 -286 1 57.1 12.0 9 233 i-23 0.8" > > 05:31Z imager 1.00000 0 -412 -307 1 57.1 13.2 8 257 i-23 0.8" > > 06:15Z imager 1.00000 0 -410 -304 1 57.1 13.2 8 248 i-23 0.7" > > 06:44Z imager 1.00000 0 -425 -302 0 64.3 13.1 8 244 i-23 0.7" > > 08:11Z imager 1.00000 0 -417 -294 0 64.6 12.7 8 246 i-23 1.0" > > > > ---=== WEATHER LOG ===--- > > > > Wind > > Time Temp F Dewp F MPH Direction Dust DIMM Sky > > 23:40Z 61 47 11 256 (WSW) -9999 - > > 00:12Z 58 49 11 253 (WSW) -9999 - > > 00:42Z 58 49 7 244 (WSW) -9999 - > > 01:13Z 56 49 7 242 (WSW) -9999 - > > 01:46Z 55 49 6 251 (WSW) -9999 - > > 02:10Z 55 48 10 236 (SW) -9999 - clouds > > 02:42Z 55 49 11 237 (WSW) -9999 - clear > > 03:14Z 54 48 8 250 (WSW) -9999 - clear > > 03:45Z 55 48 8 228 (SW) -9999 - clear > > 04:15Z 54 47 8 251 (WSW) -9999 - clear > > 04:46Z 55 46 7 227 (SW) -9999 - clear > > 05:17Z 55 46 8 228 (SW) -9999 - clear > > 05:47Z 55 44 8 228 (SW) -9999 - clear > > 06:19Z 55 44 11 245 (WSW) -9999 - clear > > 06:50Z 55 45 8 236 (SW) -9999 - clear > > 07:20Z 54 45 6 250 (WSW) -9999 - clear > > 07:52Z 54 44 7 233 (SW) -9999 - clear > > 08:23Z 54 44 7 251 (WSW) -9999 - clouds > > 08:56Z 55 42 6 255 (WSW) -9999 - clouds > > 09:28Z 53 44 5 210 (SSW) -9999 - clouds > > 10:00Z 53 45 5 184 (S) -9999 - clouds > > 10:33Z 53 44 2 182 (S) -9999 - clouds > > 11:05Z 52 46 5 114 (ESE) -9999 - clouds > > 11:37Z 51 49 11 138 (SE) -9999 - clouds > > > > ---=== TELESCOPE STATUS ===--- > > > > 00:40Z Fans on, but doors not open due to spectro checkout. > > 01:05Z Doors open. > > 01:40Z Doors closed, fans and blowers off (humidity and imager bias). > > 02:10Z Enclosure doors opened, fans and blowers on, louvers opened. > > 02:40Z Enclosure off. > > 09:20Z Enclosure on (clouds). > > 11:20Z Doors closed, fans and blowers off, louvers closed. > > > > Telescope stowed at 30 degrees with cartridge 5 (plate 2256) mounted. > > Counterweights at 255. Spectro auto-fill connected. > > > > Imager dewar 11:53 181 lb, 20 psi > > Spectro dewar 11:53 133 lb, 16 psi > > > > No interlocks bypassed. > > > > ---=== SOFTWARE USED ===--- > > > > IOP/SOP: iop neilsen > > Watcher: watcher neilsen > > MCP: v5_26_0 > > TPM: tpm_v3_1_0 > > AstroDa: biery > > TCC: TCC 2.7.2.1 August 6 2004 > > sdssProcedures: v2_03 > > SoS: v4_10_7 > > hoggPT: v1_6_9 > > plate-mapper: v4_3_1 > > > > ---=== MIRROR NUMBERS ===--- > > > > PRIMARY: > > -------- > > Scale: 1.000000 > > > > MIGS TONIGHT NOMINAL > > Axial A -5.8430 -5.8440 > > Axial B -5.6760 -5.6770 > > Axial C 0.9420 0.9420 > > Trans D -9.9920 -9.9940 > > Lateral E 10.3759 10.3759 > > Lateral F 11.9380 11.9380 > > > > GALILS > > Commanded: 4700. -2450. 3000. -7800. 3300. 3000. > > Actual: 4711. -2457. 2997. -7825. 3296. 3024. > > > > SETMIR VALUES > > PriDesOrient: 0.00 -1.68 7.05 385.25 92.02 > > PriOrient: 0.00 -1.52 7.02 384.99 93.81 > > > > SECONDARY: > > ---------- > > Focus: 0.00 > > Air Temp.: 15.0 > > Alt.: 30.001649 > > > > MIGS TONIGHT NOMINAL > > Axial A 1.5420 1.5420 > > Axial B 1.0480 1.0470 > > Axial C 1.1660 1.1650 > > Trans D -0.1160 -0.1240 > > > > GALILS > > Commanded: 1593419. 1603643. 1554257. -6800. -5900. > > Actual: 1593447. 1603642. 1554316. -6820. -5882. > > > > SETMIR VALUES > > SecDesOrient: 1257.00 15.87 0.00 -50.00 136.76 > > SecOrient: 1256.98 15.89 0.01 -49.55 136.73 > > > > ---=== PROBLEMS IN DETAIL ===--- > > > > > > DSS DSS DSS DSS DSS Digital Sky Survey DSS DSS DSS DSS DSS DSS > > DSS *** The information posted to SDSS mailing lists is proprietary *** > > DSS This is message 2565 in the sdss-25mlog archive, URL > > DSS http://www.astro.princeton.edu:81/sdss-25mlog/msg.2565.html > > DSS The index is at http://www.astro.princeton.edu:81/sdss-25mlog/INDEX.html > > DSS To join/leave the list, go to > > DSS http://www.astro.princeton.edu:81/cgi-bin/mailinglists.pl/show_subscription?list=sdss-25mlog > > DSS To post a message, mail it to sdss-25mlog@astro.princeton.edu > > DSS > > DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS > > > > DSS DSS DSS DSS DSS Digital Sky Survey DSS DSS DSS DSS DSS DSS > DSS *** The information posted to SDSS mailing lists is proprietary *** > DSS This is message 2566 in the sdss-25mlog archive, URL > DSS http://www.astro.princeton.edu:81/sdss-25mlog/msg.2566.html > DSS The index is at http://www.astro.princeton.edu:81/sdss-25mlog/INDEX.html > DSS To join/leave the list, go to > DSS http://www.astro.princeton.edu:81/cgi-bin/mailinglists.pl/show_subscription?list=sdss-25mlog > DSS To post a message, mail it to sdss-25mlog@astro.princeton.edu > DSS > DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS >