NIKA2 run 6 29 October 2016
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2016-10-29
Quick description of the session: Beammaps then secondary calibrator
We regulate at 205 mK and we are at 30% on the pump to be on the safe side. We solve the issue with the noise on the 2 mm array which was due to a misbehavior of the synthesizer: Martino told us to restart it and now the noise looks very good. Juan Penalver has provided a new pointing model.
Observers: Juan + Florian -- Operator: Quique
Scan |
UT |
Source |
Command |
Az |
El |
Pointing X, Y, Focus |
Tau225 |
Tau260 |
Tau150 |
Comment |
167 |
15h50 |
Mars |
Track |
158.19 |
26.31 |
0 0 0.00 -0.36 -0.45 |
0.34 |
|
|
We start a new session (Juan, Florian, operator: Quique). We decide to start by going on Mars for a large map on the sky to get enough flux to sample the far side lobes |
168 |
15h58 |
Mars |
Track -200 -200 |
159.61 |
26.72 |
0 0 0.00 -0.36 -0.45 |
0.34 |
|
|
Another track to tune the detectors |
169 |
16h00 |
Mars |
Track -200 -200 |
160.15 |
26.81 |
0 0 0.00 -0.36 -0.45 |
0.34 |
|
|
Another track to tune the detectors |
170 |
16h12 |
Mars |
Track -200 -200 |
163.14 |
27.56 |
0 0 0.00 -0.36 -0.45 |
0.34 |
|
|
Another track to tune the detectors |
171 |
16h13 |
1921-293 |
Track -200 -200 |
167.63 |
22.69 |
0 0 0.00 -0.36 -0.45 |
0.28 |
|
|
Another track to tune the detectors |
172 |
16h14 |
1921-293 |
pointing b |
167.85 |
22.74 |
0 0 0.00 -0.36 -0.45 |
0.28 |
|
|
We do a pointing a another source than Mars to avoid saturation of the detectors --> To faint for a good pointing --> We go on Neptune |
173 |
16h18 |
Neptune |
Track -200 -200 |
115.25 |
16.85 |
0 0 0.00 -0.36 -0.45 |
0.28 |
|
|
|
174 |
16h21 |
Neptune |
pointing b |
115.43 |
17.08 |
0 0 0.00 -0.36 -0.45 |
0.33 |
0.39 |
0.24 |
The pointing is really bad... tau is low but fluctuating a lot --> set pointing 3.6 -7.7 |
175 |
16h24 |
Neptune |
pointing b |
115.99 |
17.64 |
3.60 -7.70 0.00 -0.36 -0.45 |
0.33 |
0.39 |
0.24 |
The pointing is really bad... tau is low but fluctuating a lot --> we go at higher elevation |
176 |
16h28 |
G34.3 |
Track -200 -200 |
178.39 |
54.10 |
3.60 -7.70 -0.36 -0.45 |
0.36 |
|
|
This source is much higher so the pointing should be good |
177 |
16h30 |
G34.3 |
pointing b |
178.80 |
54.12 |
3.60 -7.70 0.00 -0.36 -0.45 |
0.29 |
0.39 |
0.24 |
Now the pointing is ok --> set pointing 1.90 -5.60 |
178 |
16h33 |
G34.3 |
pointing b |
180.06 |
54.13 |
1.90 -5.60 0.00 -0.36 -0.45 |
0.25 |
0.39 |
0.24 |
Check the pointing --> set pointing 4.10 -4.80 |
179 - 183 |
16h36 |
G34.3 |
focusOTF-Z |
181.40 |
54.15 |
4.10 -4.80 0.00 -0.36 -0.45 |
0.30 |
0.35 |
0.24 |
Now we do a focus along the Z-direction --> set focus 0.5 (weird it seems that the flux keeps increasing --> we do the focus again) |
184 - 188 |
16h46 |
G34.3 |
focusOTF-Z |
185.49 |
54.02 |
4.10 -4.80 0.00 -0.36 0.5 |
0.42 |
0.30 |
0.21 |
We check the focus along the Z-direction --> set focus 0.61 (now we have good results, with a parabolic variation of the flux but it is still weird that the focus correction is positive) |
189 |
16h55 |
G34.3 |
pointing b |
189.19 |
53.76 |
4.10 -4.80 0.00 -0.36 0.61 |
0.36 |
0.39 |
0.24 |
Check the pointing --> set pointing -0.4 -3.3 |
190 |
17h04 |
Neptune |
Track -200 -200 |
123.81 |
24.70 |
-0.4 -3.3 0.00 -0.36 0.61 |
0.28 |
|
|
Now that the pointing and the focus is quite good, we go on Neptune which is high enough to start the beammap sequence (poiniting/focus_X_Y_Z/beammap) |
191 |
17h06 |
Neptune |
pointing b |
123.97 |
24.86 |
-0.4 -3.3 0.00 -0.36 0.61 |
0.28 |
0.27 |
0.18 |
First a pointing --> set pointing -1.1 -3.9 |
192 - 196 |
17h09 |
Neptune |
focusOTF-Z |
124.73 |
25.46 |
-1.10 -3.90 0.00 0.00 0.61 |
0.34 |
|
|
Focus along the Z-direction --> set focus 0.21 |
197 - 201 |
17h17 |
Neptune |
focusOTF-Z |
126.26 |
26.66 |
-1.10 -3.90 0.00 0.00 0.21 |
0.36 |
|
|
Check the focus along the Z-direction --> set focus 0.21 |