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| ||235 || 21h45 || 3C84 || @pol/cross || 421 || 38 || 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 changle the account t21 -> nikas-14 || 21h48 || || || || || || || || ||237 || 22h00 || 3C84 || track -200 -200 || 63 || 41 || 0,0,-1.8 || 0.2 || || |
NIKA January 20th, 2014 / S2
Back to list of day to day logbook of observations
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 changle the account t21 -> nikas-14 |
21h48 |
|
|
|
|
|
|
|
237 |
22h00 |
3C84 |
track -200 -200 |
63 |
41 |
0,0,-1.8 |
0.2 |
|