NIKA, January 24th, 2014 / S5

[[D2DLogNika7 |Back to list of day to day logbook of observations]]

== 2014-01-24 ==

 .We use both the manual log below and the tapas database that automatically fills scans table with the scan informations.
 .So please login with the t21 acount and its usual password (durc***9) to the [[https://tapas.iram.es/tapas/ | TAPAS]] database.
 .'''For now the TAPAS is not fully filled in real time, but completed with all the scans everyday by Pablo on the morning following the observations. So we keep a manual log below, but in a simplified table with the comments and only the most useful scan info.'''

Programm for today:
 * We start with the polariser mounted and running.
 * Skydip.
 * Focus and Beam maps on Uranus. Centered on the refence detector: #494 of the 2mm array (#5 of the 1mm array is very close to it).
 * Polar Lissajous on several quasars
 * Finish polar session at sunset with beam map on Uranus and skydip.
 * Dismount polariser just after sunset.
 * Beam map on Uranus
 * Resume pointing session
 * Beam map on Uranus or a bright quasar.
 * Integration on a very weak source to measure the noise.

Remark for NIKA staff: Good data are on RAW_X9 

'''OFFSET -37 -30 /sys Nasmyth => select detector 494 as reference'''

||'''Scan'''||'''UT'''||'''Source'''||'''Command''' ||'''Pointing X,Y, Focus'''|| '''Comment''' ||
|| 182 || 15h34 || DIY-Tip || skydip_up || 0 0, -1.4 || OFFSET -37 -30 /sys Nasmyth ||
|| 183 || 15h45 || Uranus || track || 0 0, -1.4 || hwp runing, Tau 0.3. ''problem in raw file writting. good file recovered on Jan 25, imbfits regenerated.''||
|| 184 || 15h47 || Uranus || pointliss_pol || 0 0, -1.4 || hwp runing, we see Uranus well only at 1mm, very faint at 2mm ?! ||
|| 185 || 15h59 || Uranus || pointliss_pol || 0 0, -1.4 || hwp runing, Uranus very faint on both bands !! ||
|| 186 || 16h06 || Uranus || otf5x5_pol || 0 0, -1.4 || hwp runing, check if pb due to scan type... ||
|| 187 || 16h16 || Uranus || pointliss_pol || 0 0, -1.4 || rotating hwp stoppted: it works => pb due to processing of lockin ||
|| 188 || 16h30 || Uranus || cross || 0 0, -1.4 || rotating hwp restarted: same pb as with pointliss. 1mm say pointing 0 3.4 ||
|| 189 || 16h30 || Uranus || focusp || 0 3.4, -1.4 || hwp runing, take scan for offline test once lockin fixed ||
|| 190-191 || 16h50 || Uranus || focusliss || 0 3.4, -1.4 || hwp runing, take scan for offline test once lockin fixed '''canceled, hwp stopped during 2nd scan''' ||
|| 192-196 || 16h54 || Uranus || focusliss || 0 3.4, -1.4 || hwp runing, take scan for offline test once lockin fixed, work OK at 1mm -> should set focus -1.2 ||
|| 197 || 17h03 || Uranus || focusp || 0 3.4, -1.4 || hwp stopped, should set focus -1.4 at 1mm, -1.0 at 2mm -> keep best at 1mm ||
|| 198 || 17h07 || Uranus || cross || 0.7 4.3, -1.4 || hwp stopped, should set pointing 0.7 4.3 ||
|| 199 || 17h14 || Uranus || otfgeom_pol || 0.7 4.3, -1.4 || hwp runing, '''canceled''' started oft5x5_pol instead of otfgeom_pol ||
|| 200 || 17h14 || Uranus || otfgeom_pol || 0.7 4.3, -1.4 || hwp runing, ||
|| 201 || 17h40 || 3C454.3 || track || 0.7 4.3, -1.4 || hwp runing, ||
|| 202 || 17h46 || 3C454.3 || pointliss_pol || 0.7 4.3, -1.4 || hwp runing, ''reduced pol scans are currently too weak to compute reliable pointings corrections'' ||
|| 203 || 17h50 || 2013+270 || track || 0.7 4.3, -1.4 || hwp runing, ||
|| 204 || 17h55 || 2013+270 || pointliss_pol || 0.7 4.3, -1.4 || hwp runing, ||
|| 205 || 17h55 || 2013+270 || pointliss_pol || 0.7 4.3, -1.4 || hwp runing, ||
|| 206 || 18h00 || MWC349 || track || 0.7 4.3, -1.4 || hwp runing, ||
|| 207 || 18h02 || MWC349 || pointliss_pol || 0.7 4.3, -1.4 || hwp runing, '''canceled''' pb subref motor ||
|| 208 || 18h05 || MWC349 || pointliss_pol || 0.7 4.3, -1.4 || hwp runing, ||
|| 209 || 18h15 || 3C84 || track || 0.7 4.3, -1.4 || hwp runing, '''canceled''' telescope error ||
|| 210 || 18h15 || 3C84 || track || 0.7 4.3, -1.4 || hwp runing, '''canceled''' telescope error ||
|| 211 || 18h15 || 3C84 || track || 0.7 4.3, -1.4 || hwp runing, '''''When sources are ~ >1 degree appart, track is not necessary !''''' ||
|| 212 || 18h20 || 3C84 || pointliss_pol || 0.7 4.3, -1.4 || hwp runing, ||
|| 213 || 18h25 || 3C111 || pointliss_pol || 0.7 4.3, -1.4 || hwp runing, ||
|| 214-218 || 18h35 || Uranus || focusliss || 0.7 4.3, -1.4 || hwp runing, should set focus -1.4 at 1mm, -1.0 at 2mm -> keep best at 1mm ||
|| 219 || 18h45 || Uranus || otfgeom || 0.7 4.3, -1.4 || hwp runing, ||
|| 220 || 19h00 || 3C454.3 || pointliss_pol || 0.7 4.3, -1.4 || hwp runing, ||
|| 221 || 19h10 || DIY-Tip || skydip_up || 0.7 4.3, -1.4 || hwp runing, END of Polar session. ||
|| 222 || 19h29 || Uranus || cross || 0.7 4.3, -1.4 || hwp stopped, polariser dismounted. '''bad scan, resonances lost''' ||
|| 223 || 19h34 || Uranus || cross || 0.7 4.3, -1.4 || should set pointing 3.9 7.7 ||
|| 224 || 19h40 || Uranus || focusp || 3.9 7.7, -1.4 || should set focus -1.5 (prety noisy, fit not accurate, low elevation, tau = 0.45) ||
|| 225 || 19h45 || Uranus || cross || 3.9 7.7, -1.5 || should set pointing 4.4 8.2. Use it as 1st point of the '''''pointing session''''' ||
|| 226-230 || 19h48 || Uranus || focusliss || 4.4 8.2, -1.5 || should set focus -1.6 ||
|| 231 || 20h00 || Uranus || otfgeom || 4.4 8.2, -1.6 || ||
|| 232 || 20h17 || 0133+476 || cross || 4.4 8.2, -1.6 || should set pointing 5.6 -0.6 scan noisy, do pointliss ||
|| 233 || 20h17 || 0133+476 || pointliss || 4.4 8.2, -1.6 || should set pointing 4.9 -2 ||
|| 234 || 20h30 ||0316+413 (3C84) || cross || 4.9 -2.0, -1.6 || should set pointing 12.9 -1.7 ||
|| 235 || 20h30 ||0316+413 (3C84) || cross ||-12.9 -1.7, -1.6 || disregard, wrong pointing entered ||
|| 236 || 20h30 ||0316+413 (3C84) || cross || 12.9 -1.7, -1.6 || should set pointing 4.7 -0.5 ||
|| 237 || 20h40 ||0316+413 (3C84) || cross || 4.7 -0.5, -1.6 || should set pointing 1.6 0.6 ''pointing varies a lot; due to wind ???'' ||
|| 238 || 20h45 ||0316+413 (3C84) || focusp || 1.6 0.6, -1.6 || should set focus -0.6 @ 1mm, -1.4 @ 2mm ||
|| 239-243 || 20h52 ||0316+413 (3C84) || focusliss || 1.6 0.6, -1.0 || should set focus -2.0 @ 1mm, -1.3 @ 2mm -> huge fluctuation @ 1mm wrt scan 238||
|| 244 || 21h06 ||0316+413 (3C84) || cross || 1.6 0.6, -1.3 || should set pointing 2.0 1.3, '''''tau 0.7, wind peak 10m/s, pointing session compromised ?''''' ||
|| 245 || 21h16 || DIY-Tip || skydip_up || 2.0 1.3, -1.3 || ...time to think... ||
|| 246 || 21h29 ||0316+413 (3C84) || otfgeom || 2.0 1.3, -1.3 || ... conditions really limit for a pointing session... try otfgeom on this bright quasar ||
|| 247 || 21h49 ||0316+413 (3C84) || otfgeom || 2.0 1.3, -1.3 || pb with pipeline (Variable is undefined: BOX.)... take another otf for redundency ... NIKEL 1 might have crashed during the scan ||
|| 248 || 22h33 || 0716+714 || cross || 2.0 1.3, -1.3 || '''''conditions too bad for pointing session & for geometries'''''. go have a look to M82, then GN20 nearby. scan too bad ||
|| 249 || 22h33 || 0716+714 || cross || 2.0 1.3, -1.3 || should set pointing -0.2 -0.9 ... but noisy scan ||
|| 250 || 22h40 || 0716+714 || pointliss || 2.0 1.3, -1.3 || should set pointing -0.1 -0.5 ||
|| 251 || 22h46 || 0716+714 || focusp || -0.1 -0.5, -1.3 || should set focus -1.3 ||
|| 252 || 22h50 || M82 || otf3x3 || -0.1 -0.5, -1.3 || will we see the supernova ? ||
|| 253 || 22h59 || M82 || otf3x3 || -0.1 -0.5, -1.3 || ||
|| 254 || 23h05 || M82 || otf3x3 || -0.1 -0.5, -1.3 || ||
|| 255 || 23h15 || M82 || otf3x3 || -0.1 -0.5, -1.3 || maps hawful, even co-added ||
|| 256 || 23h23 || 1044+719 || pointliss || -0.1 -0.5, -1.3 || too faint ||
|| 257 || 23h28 ||(B)1039+811 || pointliss || -0.1 -0.5, -1.3 || ''raw data file apparently not written !'' => due to timing issue, need to rename xxxx_tim file to recover the data (see Alain's email) ''good file recovered on Jan 25, imbfits regenerated''||
|| 258 || 23h35 ||(B)1039+811 || pointliss || -0.1 -0.5, -1.3 || too faint too ... impossible to make pointing correction ||
|| 259 || 23h40 || GN20 || faintlissfast || -0.1 -0.5, -1.3 || see how we integrate down very faint source for the remaining 20 min (for noise analysis) with Tau 0.8... ||
|| 260 || 23h45 || GN20 || faintlissfast || -0.1 -0.5, -1.3 || do the fast Lissajou rather than slow to beat skynoise ... elevation = 40 deg but many tracking errors 2-5"||
|| 261 || 23h50 || GN20 || faintlissfast || -0.1 -0.5, -1.3 || ''raw data file apparently not written !'' => due to timing issue, need to rename xxxx_tim file to recover the data (see Alain's email) ''good file recovered on Jan 25, imbfits regenerated''||
|| 262 || 23h58 || GN20 || faintliss1 || -0.1 -0.5, -1.3 || same size twice slower: tracking errors ~ ||