NIKA October 9th, 2014 / S3
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2014-10-09
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
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 |