NIKA October 9th, 2014 / S3

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== 2014-10-09 ==

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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

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Polarizer on, HWP on but not turning at session start

Data Repository: Raw_X35

Acquisition = 47 Hz 

Values in brackets [] are not updated.

||'''Scan'''||'''UT'''||'''Source'''||'''Command'''              ||'''Az'''||'''El'''||'''Pointing X, Y, Focus'''||'''Tau225'''||    '''Comment'''         ||
||206-213   || 18h20  ||  Mars      ||  Track  off -200 -200     ||  212   ||  20    ||   0,0,-1.8               ||   0.2      || Tuning  , using nikas-14 session    ||
||214-223   || 19h20  ||2200+420 (BLLac)||  Track  off -200 -200 ||  400   ||  80    ||   0,0,-1.8               ||   0.2      || problem of tuning/acquisition Alain and Andrea working on it, switch to t21 session in the meantime   ||
||224-228       || 20h20  ||2200+420 (BLLac)||  cross                ||  400   ||  80    ||   0,0,-1.8               ||   0.2      || problems with acquisition Alain and andrea working on it, scan bad ||
||229       || 20h59  || 3C84 ||  @pol/cross                ||  417   ||  30    ||   0,0,-1.8               ||   0.2      || Bad : huge "dip" in the data ||
||230       || 21h02  || 3C84 ||  @pol/cross                ||  417   ||  30    ||   0,0,-1.8               ||   0.2      || Again, negative peak, strong noise, bad image... Andrea changes the PC position in the cabin||
||231       || 21h15  || 3C84 ||  track -200 -200      ||  419   ||  33    ||   0,0,-1.8               ||   0.2      || ||
||232       || 21h20  || 3C84 ||  @pol/cross           ||  419   ||  33    ||   0,0,-1.8               ||   0.2      ||Still a peak betwen scans in az and el, also the source is negative in the timelines ||
||233       || 21h31  || 3C84 ||  track -200 -200      ||  419   ||  33    ||   0,0,-1.8               ||   0.2      || ||
||234       || 21h40  || 3C84 ||  track -200 -200      ||  421   ||  37    ||   0,0,-1.8               ||   0.2      || ||
||235       || 21h45  || 3C84 ||  @pol/cross           ||  421   ||  38    ||   0,0,-1.8               ||   0.2      || no data written on Sami ||
||236       || 21h48  || 3C84 ||  @pol/cross           ||  421   ||  38    ||   0,0,-1.8               ||   0.2      || signal is positive, but the "large glitch" is still there (positive though...) ||
|| we change the account : t21 -> nikas-14 || 21h48  ||  ||          ||     ||    ||               ||        || ||
||237       || 22h00  || 3C84 ||  track -200 -200      ||  63   ||  41    ||   0,0,-1.8               ||   0.2      ||  ||
||238       || 22h12  || 3C84 ||  @cross     ||  63   ||  41    ||   0,0,-1.8               ||   0.2      || scan loaded, but did not start - cancelled ||
||239       || 22h17  || 3C84 ||  @cross     ||  64   ||  43    ||   0,0,-1.8               ||   0.2      || scan loaded, but did not start - cancelled (because of wind, we change source) ||
||240       || 22h21  || 2200+420 ||  track -200 -200      ||  294   ||  73    ||   0,0,-1.8               ||   0.2      ||  ||
||241       || 22h26  || 2200+420 ||  @cross      ||  294   ||  73    ||   0,0,-1.8               ||   0.2      ||  ||
||242       || 22h34  || 2200+420 ||  @cross      ||  294   ||  73    ||   0,0,-1.8               ||   0.2      || set pointing -55.8 -32.9 - We did a mistake in offset detection  ||
||243       || 22h37  || 2200+420 ||  @cross      ||  294   ||  73    ||   0,0,-1.8               ||   0.3      || set pointing 0 0  ||
||244       || 22h47  || 2200+420 ||  @cross      ||  292   ||  69    ||   0,0,-1.8               ||   0.3      || set pointing 42 35 - offset 42.3 35 /sys nas, still large fluctuations, not in the middle and @1 &2mm ||
||245       || 22h42  || uranus   ||  track       ||  153   ||  55    ||   0,0,-1.8               ||   0.3      ||  ||
||246       || 22h58  || uranus   ||  @cross      ||  153   ||  55    ||   0,0,-1.8               ||   0.3      || Uranus is seen, but bad timelines... ||
||247       || 23h09  || uranus   ||  @cross      ||  159   ||  56    ||   0,0,-1.8               ||   0.3      || Uranus is seen, but bad timelines... Doing a cross with the HWP rotating at increasing speed ||
||248       || 23h09  || uranus   ||  @cross      ||  159   ||  56    ||   0,0,-1.8               ||   0.3      || Uranus is seen, but bad timelines... Doing a cross with the HWP rotating at increasing speed ||
||STOP       || 23h09  || uranus   ||  @cross      ||  159   ||  56    ||   0,0,-1.8               ||   0.3      || stopping because of wind ||