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| .Cryostat Temperature: 180mK (regulated with heater). .Arrays status tonight: Array1 about 30 bad out of 1060, Array2 about 3 bad out of 580, Array3 about 30 bad out of 1045 .Noise seems fine: no appreciable PT effect .Tau is really very high: we start with the window on cryo and try to move the telescope around --> dark tests! .Modulation of frequency: 4kHz for Array2, 8kHz for Array1 and 3 |
* Cryostat Temperature: 180mK (regulated with heater). * Arrays status tonight: Array1 about 30 bad out of 1060, Array2 about 3 bad out of 580, Array3 about 30 bad out of 1045 * Noise seems fine: no appreciable PT effect * Tau is really very high: we start with the window on cryo and try to move the telescope around --> dark tests! * Modulation of frequency: 4kHz for Array2, 8kHz for Array1 and 3 |
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| || 144 || 17h09 || 3C279 || track || 130 || 33.6 || 0.0 0.0 -2.4 || 0.828 || Expected flux: 11-20 Jy || || 145 || 17h15 || 3C279 || otf_geom || 131.4 || 34.0 || 0.0 0.0 -2.4 || 0.822 || looks like some resonances still lost, do manual sweep to get them back while otf being processed and analyzed || || 146 || 17h45 || 3C279 || otf_geom || 134 || 36 || 0.0 0.0 -2.4 || 0.814 || All resonances are found. Auto tuning on from now on|| || 147 || 17h57 || 3C279 || pointing_cross|| 140 || 39 || 0.0 0.0 -2.4 || 0.814 || to test cross scan and file while RA & NP process the otf to determine the ref pix|| || 148 || 18h01 || 3C279 || pointing_lissajous|| 140 || 39 || 0.0 0.0 -2.4 || 0.814 || to test cross scan and file while RA & NP process the otf to determine the ref pix ; cryostat warming up a bit|| || 149 || 18h02 || 3C279 || pointing_lissajous|| 140 || 39 || 0.0 0.0 -2.4 || 0.814 || Testing small 1.5'x1.5' lissajous map|| || 150 || 18h04 || 3C279 || pointing_lissajous|| 149 || 42 || 0.0 0.0 -2.4 || 0.814 || || || 151 || 18h16 || 3C279 || faintSource_lissajous|| 149 || 42 || 0.0 0.0 -2.4 || 0.76 || Same lissajous curve parameter as above, longer integration (to be used typically on faint sources)|| || 152 || 18h31 || Az=150 || diydown (skydip)|| 150 || 65 || 0.0 0.0 -2.4 || 0.76 ||Track - testing skydip with Track at starting elevation to let the KID be tuned|| || 153 || 18h32 || Az=150 || diydown (skydip)|| 150 || 65 || 0.0 0.0 -2.4 || 0.76 ||Track - testing skydip with Track at starting elevation to let the KID be tuned|| || 154 || 18h33 || Az=150 || diydown (skydip)|| 150 || 65 || 0.0 0.0 -2.4 || 0.76 ||diy command failed at the first commanded elevation was 120 degrees!! My mistake, the original script was wrongly modified|| || 155 || 18h35 || Az=180 || diyup (skydip)|| 180 || 20 || 0.0 0.0 -2.4 || 0.76 ||testing skydip with Track at starting elevation to let the KID be tuned|| || 156 || 18h38 || Az=180 || diyup (skydip)|| 180 || 20 || 0.0 0.0 -2.4 || 0.76 || Actual skydip -- KIDs have lost the resonances...|| || 157 || 18h38 || Az=180 || diyup (skydip)|| 180 || 20 || 0.0 0.0 -2.4 || 0.76 || Track to tune the KIDs at 20 degrees elevation, but telescope go back to 10 degrees after|| || 158 || 19h03 || Az=180, el=20 || diyup (skydip)|| 180 || 20 || 0.0 0.0 -2.4 || 0.76 || Track to tune the KIDs at 20 degrees elevation (specifying a source at el.=20)|| || 159 || 19h10 || Az=180, el=20 || diyup (skydip)|| 180 || 20 || 0.0 0.0 -2.4 || 0.76 || seems to have worked ok|| || 160 || 19h19 || 3C279 || track || 169 || 46 || 0.0 0.0 -2.4 || 0.752 || Reference pixel is 434 and 28 (offline team NP, RA, AC, ) || || 161 || 19h26 || 3C279 || pointing_cross || 172 || 47 || 0.0 0.0 -2.4 || 0.760 || Try to find a pointing correction || || 162 || 19h30 || 3C279 || pointing_cross || 172 || 47 || 0.0 0.0 -2.4 || 0.760 || Try to find a pointing correction || || 163 || 19h41 || 3C279 || pointing lissajou || 175 || 47 || 0.0 0.0 -2.4 || 0.760 || Try to find a pointing correction || || 164 || 19h50 || 3C279 || pointing lissajou || 182 || 47 || 0.0 0.0 -2.4 || 0.760 || Try to find a pointing correction || || 165 || 20h05 || 3C279 || pointing cross || 185.5 || 46.9 || +25 0.0 -2.4 || 0.760 || Try to find a pointing correction || || 166 || 20h05 || 3C279 || pointing cross || 185.5 || 46.9 || +25 +25 -2.4 || 0.760 || Try to find a pointing correction ; pointing requested too big (>50) ; go try radio alignment even if sky not great, screws: Corridor side = 4.12, Wall side = 4.02 || || 167 || 20h49 || 3C279 || pointing cross || 201 || 44.8 || +25 +25 -2.4 || 0.760 || '''radio alignment was actually doable''', screws: C = 3.70 => gain ~1kHz, W = 3.02 => gain <0.5 kHz ; maybe problem at the end of the scan || || 167 || 20h49 || 3C279 || pointing cross || 201 || 44.8 || +25 +25 -2.4 || 0.760 || => radio alignment get better background & better pointing (now pointing offset requested are in range) || || 169 || 21h10 || 3C279 || pointing cross || 207 || 43.0 || -5 -15 -2.4 || 0.760 || || || 170 || 21h12 || 3C279 || pointing cross || 207 || 43.0 || -20 -10 -2.4 || 0.750 || set pointing variation is very big => axis of rotation is far from our ref pixel ; check other pixels => 181 and 505 seem close to the axis of rotation, far from 434 and 28 => tomorrow set nasmyth offset in starting pointing model asap in order to use 434 and 28 as reference for the pointing session || || 171 || 21h26 || 3C279 || pointing cross || 212 || 41.3 || 0 -2 -2.4 || 0.750 || too late for the pointing session, so for now we use pixels 181 and 505 as ref to check focus, pointing and will find which nasmyth offset we need to choose 432 and 28 as ref tomorrow|| || 172 || 21h51 || 3C279 || focus || 212 || 41.3 || 0 -2 -2.4 || 0.750 || || || 173 || 21h51 || 3C279 || focus lissajou || 212 || 41.3 || 0 -2 -2.4 || 0.750 || || || 174 || 21h51 || 3C279 || focus lissajou || 212 || 41.3 || 0 -2 -3.0 || 0.750 || || || 175 || 21h51 || 3C279 || focus lissajou || 212 || 41.3 || 0 -2 -3.6 || 0.750 || || |
NIKA2 run 6 26 October 2016
Back to list of day to day logbook of observations
2016-10-26
- Cryostat Temperature: 180mK (regulated with heater).
- Arrays status tonight: Array1 about 30 bad out of 1060, Array2 about 3 bad out of 580, Array3 about 30 bad out of 1045
- Noise seems fine: no appreciable PT effect
Tau is really very high: we start with the window on cryo and try to move the telescope around --> dark tests!
- Modulation of frequency: 4kHz for Array2, 8kHz for Array1 and 3
- Quick description of the session: just dark tests, a priori..
Scan |
UT |
Source |
Command |
Az |
El |
Pointing X, Y, Focus |
Tau225 |
Comment |
140 |
~ 16h |
Mars |
Track |
|
|
|
|
closed window, test data tranfert |
141 |
16h05 |
Mars |
Cross |
277.687 |
26.626 |
0.0 0.0 -2.4 |
0.862 |
opened window, test arrays frequencies |
142 |
16h30 |
Mars |
OTF_geom |
277 |
26.6 |
0.0 0.0 -2.4 |
0.85 |
Juan put Nasmyth offset to 0 in pointing model; this is our starting point before the session ; tuning during the scan |
143 |
16h34 |
Mars |
otf_geom |
281 |
20.6 |
0.0 0.0 -2.4 |
0.85 |
still tests and tunes on arrays (after scan), some resonances lost, auto tune was not on, find again by hand... |