NIKA October 8th, 2014 / S2 [[D2DLogNika9 |Back to list of day to day logbook of observations]] == 2014-10-08 == ---- Opacity is measured with the new taumeter at 225 GHz Nasmyth offsets : 21.2, 36.75 Set pointing : 0, 0 Set Focus : -1.8 mm .Quick description of the session: measure polarization of quasars at various elevations and planets to test our system and calibrate ---- '''UNTIl SCAN 295, M4 WAS BADLY PLACED''' Data Repository: Raw_X35 Values in brackets [] are not updated. ||'''Scan'''||'''UT'''||'''Source'''||'''Command''' ||'''Az'''||'''El'''||'''Pointing X, Y, Focus'''||'''Tau225'''|| '''Comment''' || ||276 || 18h20 || 1749+096 || Track off -200 -200 || 219 || 56 || 0,0,-1.8 || 0.6 || || ||277 || 18h26 || 1749+096 || Track off -200 -200 || 219 || 56 || 0,0,-1.8 || 0.6 || track source waiting to start observations || ||278 || 18h29 || 1749+096 || @cross || 219 || 56 || 0,0,-1.8 || 0.6 || croix || ||279 || 18h33 || mars || Track off -200 -200 || 214 || 19 || 0,0,-1.8 || 0.6 || track mars || ||280 || 18h34 || mars || @otfgeom || 214 || 19 || 0,0,-1.8 || 0.6 || otf mars || ||281 || 18h48 || mars || @cross || 217 || 18 || 0,0,-1.8 || 0.6 || cross mars : 100" away: going back to 1749 to check || ||282 || 18h51 || 1749+096 || Track off -200 -200 || 230 || 52 || 0,0,-1.8 || 0.6 || go to 1749 to check if see source || ||283 || 18h53 || 1749+096 || @cross || 230 || 52 || 0,0,-1.8 || 0.6 || code Nico plante: redo || ||284 || 18h58 || 1749+096 || @cross || 232 || 51 || 0,0,-1.8 || 0.6 || source unseen: opacity ? + KIDs tuning unstable: go to brighter source || ||285 || 19:02 || 3c454 || Track off -200 -200 || 106 || 46 || 0,0,-1.8 || 0.6 || || ||286 || 19:06 || 3c454 || @cross || 106 || 46 || 0,0,-1.8 || 0.6 || || ||287 || 19:08 || 3c454 || @cross || 106 || 46 || 0,0,-1.8 || 0.6 || source at more than 50" || ||288 || 19:12 || 3c454 ||@otf3x3 || 109 || 49 || 0,0,-1.8 || 0.6 || otf on 3c454: realize that source coordinates and coordinates tracked by telescope are different ? || ||289 || 19:15 || 3c454 || Track off -200 -200 || 109 || 49 || 0,0,-1.8 || 0.6 || otf on 3c454 || ||290 || 19:18 || 3c454 || @otf3x3 || 110 || 49 || 0,0,-1.8 || 0.6 || checking again || ||291 || 19:19 || 3c454 || @otf3x3 || 110 || 49 || 0,0,-1.8 || 0.6 || || ||292 || 19:23 || 3c454 || @otf3x3 || 110 || 49 || 0,0,-1.8 || 0.6 || || ||293 || 19:29 || 3c454 || @otf3x3 || 110 || 49 || 0,0,-1.8 || 0.6 || set offset 0 0 /SYS Nasmyth || ||294 || 19:29 || 3c454 || track || 110 || 49 || 0,0,-1.8 || 0.6 || || ||295 || 19:29 || 3c454 || @otf3x3 || 110 || 49 || 0,0,-1.8 || 0.6 || M4 was not correctly in place !! That explains the large offsets.. || ||296 || 19:42 || 3c454 || @otf3x3 || 110 || 49 || 0,0,-1.8 || 0.6 || New otf with correct M4 position, source seen !! || ||297 || 19:45 || 3c454 || track || 110 || 49 || 0,0,-1.8 || 0.6 || || ||298 || 19:46 || 3c454 || track || 110 || 49 || 0,0,-1.8 || 0.6 || Bad : Operators in the beam... || ||299 || 19:46 || 3c454 || track || 110 || 49 || 0,0,-1.8 || 0.6 ||canceled || ||300 || 19:46 || 3c454 || track || 110 || 49 || 0,0,-1.8 || 0.6 || || ||301 || 19:52 || 3c454 || @otf3x3 || 118 || 55 || 0,0,-1.8 || 0.65 || offset 21.2 36.75 /sys nasmyth || ||302 || 19:57 || 3c454 || track || 119 || 56 || 0,0,-1.8 || 0.65 || || ||303 || 19:52 || 3c454 || @cross || 119 || 56 || 0,0,-1.8 || 0.65 || offset 7.2 7.2 /sys/ nas || ||304 || 20:03 || 3c454 || @focusp || 119 || 56 || 0,0,-1.8 || 0.65 || || ||305 || 20:06 || 3c454 || @cross || 122 || 57 || 0,0,-1.8 || 0.65 || offset -7.2 -7.2 /sys/ nas || ||306 || 20:10 || 3c454 || @cross || 122 || 57 || 0,0,-1.8 || 0.65 || offset 7.2 7.2 /sys/ nas || ||307 || 20:14 || 3c454 || @otfgeom || 125 || 59 || 0,0,-1.8 || 0.65 || offset 21.2 36.75 /sys nas || ||308 || 20:28 || 3c454 || @cross || 129 || 60 || 0,0,-1.8 || 0.65 || problem scan: can not be reduced || ||309 || 20:31 || 3c454 || @cross || 130 || 61 || 0,0,-1.8 || 0.65 || problem scan: can not be reduced || ||310 || 20:33 || 3c454 || @cross || 130 || 61 || 0,0,-1.8 || 0.65 || @end: set offset 28.9 42.2 || ||311 || 20:39 || 3c454 || @cross || 134 || 62 || 0,0,-1.8 || 0.65 || @end: set offset 13.5 31.3 || ||312 || 20:39 || 3c454 || @cross || 135 || 63 || 0,0,-1.8 || 0.65 || source seems closer but corrections given by soft do not change || ||313 || 20:42 || 3c454 || @cross || 135 || 63 || 0,0,-1.8 || 0.65 || || ||314 || 20:48 || 3c454 || @cross || 135 || 63 || 0,0,-1.8 || 0.65 || trying to do cross with offsets 0,0 - @end: set offset 0 15 seems good enough: set pointing -19.7 11.4|| ||315 || 21:00 || 3c454 || @cross || 144 || 65 || 0,0,-1.8 || 0.65 || source is centered|| ||316 || 21:03 || uranus || track -200 -200 || 117 || 39 || 0,0,-1.8 || 0.65 || || ||317 || 21:03 || uranus || @cross || 118 || 39 || 0,0,-1.8 || 0.65 || retuning: untrustable result || ||318 || 21:06 || uranus || @cross || 118 || 39 || 0,0,-1.8 || 0.65 || || ||319 || 21:08 || uranus || @focusp || 119 || 39 || 0,0,-1.8 || 0.7 || do not do focus correction: bad weather and source size seems ok. apply set pointing -26 1.9 || ||320 || 21:13 || uranus || @cross || 120 || 40 || 0,0,-1.8 || 0.7 || can not reduce ? || ||321 || 21:13 || uranus || @otfgeom || 123 || 43 || 0,0,-1.8 || 0.65 || uranus is centered || ||322 || 21:37 || DIY || @obs/diyup || 122 || 20 || 0,0,-1.8 || 0.65 || cancelled || ||323-327 || 21:40 || DIY || @obs/diyup || 122 || 20 || 0,0,-1.8 || 0.62 || cancelled || ||328 || 21:49 || DIY || @obs/diyup || 122 || 20 || 0,0,-1.8 || 0.62 || || ||329 || 22:04 || Uranus || track -200 -200 || 129 || 48 || 0,0,-1.8 || 0.63 || || ||330 || 22:11 || Uranus || track -200 -200 || 129 || 48 || 0,0,-1.8 || 0.63 || || ||331 || 22:11 || Uranus || @otfgeom_25 || 129 || 48 || 0,0,-1.8 || 0.63 || crap : the HWP stopped rotating (speed 2.98 Hz 16 meas/turn) - scan cancelled || ||332 || 22:23 || Uranus || @otfgeom_25 || 139 || 51 || 0,0,-1.8 || 0.6 || 20 meas/turn, 25 arcsec/sec || ||332 || 22:23 || Uranus || @otfgeom_25 || 139 || 51 || 0,0,-1.8 || 0.6 || 20 meas/turn, 25 arcsec/sec || ||333 || 22:47 || Uranus || track || 139 || 51 || 0,0,-1.8 || 0.6 || to tune|| ||334 || 22:51 || Uranus || track || 153 || 55 || 0,0,-1.8 || 0.6 || seeing the plate turning in the signal (omega, 2omega and 4omega peaks). Trying to remove polarizer|| ||335 || 22:59 || Uranus || track || 154 || 55 || 0,0,-1.8 || 0.6 || less 2omega and 4omega so they were due to polarized noise, but still a lot of noise at frequency omega (3Hz or so): will check if waveplate is well aligned. Time to use the Vernier caliper !! || ||336-345 || 23:01 || Uranus || track || 156 || 56 || 0,0,-1.8 || 0.6 || tracking uranus while andrea and alain try to fix the waveplate || ||347 || 23:55 || Uranus || @otfgeom_25 || 180 || 57 || -26,1.9,-1.9 || 0.6 || prism has been inserted, less omega signal: try to do a map on uranus|| ||348-3 || 00:12 || Uranus || track || 185 || 57 || -26,1.9,-1.9 || 0.6 || andrea is removing the prism: tracking uranus in the meanwhile || ||4-6 || 00:16 || Uranus || @otf3x3 || 180 || 57 || -26,1.9,-1.9 || 0.6 || prism has been removed, small map with HWP rotating|| ||7 || 00:30 || Uranus || track || 185 || 57 || -26,1.9,-1.9 || 0.6 || || ||8-10 || 00:32 || Uranus || @otf3x3 || 180 || 57 || -26,1.9,-1.9 || 0.6 || polariser is mounted, small map with HWP rotating|| ||11 || 00:40 || 2200+420 || track || 294 || 47 || -26,1.9,-1.8 || 0.3 || || ||12-14 || 00:50 || 2200+420 || @otf3x3 || 294 || 47 || -26,1.9,-1.8 || 0.3 || polariser is mounted, small map with HWP rotating|| ||15 || 00:58 || 2200+420 || @cross || 295 || 45 || -26,1.9,-1.8 || 0.3 || polariser is mounted, HWP on || ||16 || 01:00 || 2200+420 || @focusp || 295 || 45 || -26,1.9,-1.8 || 0.3 || polariser is mounted, HWP on, maybe tuning per subscan|| ||17-21 || 01:05 || 2200+420 || @focusliss || 295 || 45 || -26,1.9,-1.8 || 0.3 || polariser is mounted, HWP on, maybe tuning per subscan|| ||22 || 01:05 || 2200+420 || @pointliss || 296 || 43 || -26,1.9,-1.8 || 0.3 || polariser is mounted, HWP on|| ||23 || 01:05 || 2200+420 || @otf3x3 || 296 || 43 || -26,1.9,-1.8 || 0.3 || scan cancelled|| ||24 || 01:20 || 2200+420 || @otf3x3 || 296 || 43 || -26,1.9,-1.8 || 0.3 || scan cancelled|| ||25 || 01:20 || 3C84 || track || 61 || 79 || -26,1.9,-1.8 || 0.3 || we change the source due to the wind || ||26 || 01:20 || 3C84 || @obs/otf3x3 || 61 || 79 || -26,1.9,-1.8 || 0.3 || || ||27 || 01:20 || 3C84 || track || 61 || 79 || -26,1.9,-1.8 || 0.3 || || ||28 || 01:34 || 3C84 || @obs/otf3x3 || 60 || 79 || -26,1.9,-1.8 || 0.3 || lost data - Az limit reached (60 deg) - cancelled, change az direction|| ||29 || 01:42 || 3C84 || track || 60 || 79 || -26,1.9,-1.8 || 0.3 || || ||30 || 01:42 || 0355+508 || track || 391 || 72 || -26,1.9,-1.8 || 0.3 || No HWP modulation || ||31 || 02:09 || 0355+508 || @obs/otf3x3 || 389 || 72 || -26,1.9,-1.8 || 0.3 || No HWP modulation || ||32 || 02:14 || 0355+508 || track || 391 || 72 || -26,1.9,-1.8 || 0.3 || No HWP modulation || ||33 || 02:15 || 0355+508 || @obs/otf3x3 || 386 || 73 || -26,1.9,-1.8 || 0.3 || No HWP modulation, problems with HWP motor, will be investigated tomorrow || ||34 || 02:44 || 0355+508 || track || 391 || 72 || -26,1.9,-1.8 || 0.3 || No HWP modulation || ||35 || 02:45 || 0355+508 || @obs/otf3x3 || 370 || 75 || -26,1.9,-1.8 || 0.3 || No HWP modulation || ||36 || 02:44 || 0355+508 || track || 391 || 72 || -26,1.9,-1.8 || 0.3 || No HWP modulation || ||37 || 02:52 || 0355+508 || @obs/otf3x3 || 370 || 75 || -26,1.9,-1.8 || 0.3 || No HWP modulation || ||38 || 02:52 || 0355+508 || @obs/otf3x3 || 363 || 75 || -26,1.9,-1.8 || 0.3 || No HWP modulation ||