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At 12:50 '''the NCS process that control the adjustment of the M2 focus depending on the temperature gradient stopped without anybody noticing it (no alarm)'''; this had no effect until the evening since the outside temperature was stable, but after sunset we lost about ~10 degrees in ~2 hours. Up to scan 178 everything was OK, but after integration on a faint source at scan 199 we found huge beams, we spent a significant time on various focus before figuring out that we had to move M2 by more than 3mm before finding again reasonable beams ! Such a big change of focus is very unusual, that's how we figured out the problem. |
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| || 207 || 20h34 || 3C279 || pointliss || 199 || 45 || -7 0 -1.6 || || || || | || 207 || 20h34 || 3C279 || pointliss || 199 || 45 || -7 0 -1.6 || || -9 2;-9 1;Fw 27,20;Fl7,14Jy || || || 208 || 20h38 || 3C279 || focusp2 || 199 || 45 || -7 0 -1.6 || || 0.27 -0.67 || Big change as expected || || 209 || 20h42 || 3C279 || pointliss || 201 || 45 || -9 2 -0.5 || || || Very large beams? || || 210 || 20h47 || 3C279 || focusp2 || 203 || 44 || -9 2 -0.5 || || -2.4 -1.9 || || || 211 || 20h49 || 3C279 || focusp || 203 || 44 || -9 2 -2.0 || || -1.3 ? || || || 212-216 || 20h54 || 3C279 || focusliss || 203 || 44 || -9 2 -2.0 || || Focus is -2.7!! || -1.5,-2.1,-2.7,-0.9,-0.3 two last scans many 1mm pixels lost || || 217 || 21h08 || 3C279 || focusp || 209 || 42 || -10 -1 -3.0 || || -2.5 found 1mm || || || 218 || 21h13 || 3C279 || pointliss || 211 || 42 || -10 -1 -2.5 || || -13 1;-13 1Fw23,22Fl11,19Jy || strange || || 219-223 || 21h21 || 3C279 || focusliss || 213 ||41 || -10 -1 -2.5 || || -7,0 -3.7! || -2.5 -3.1 -3.7 -1.9 -1.3 || || 224-228 || 21h21 || 3C279 || focusliss || 213 || 41 || -10 -1 -2.5 || 0.490 || -4 1 foc:-3.5 || -4 -4.6 -5.2 -3.4 -2.8 || || 229 || 21h21 || 3C279 || focusliss || 220 || 38 || -4 -1 -3.5 || || || canceled reboot kid readouts + see note above || |
Describe NK2013_Jun13 here.
Back to list of day to day logbook of observations
2013-06-13
- Cryostat Temperature: 220mK .
- Arrays status today: 192 pixels 1mm ; 128 pixels 2mm
- Modulation frequency: 8kHz 1mm, 4kHz 2mm
Opacity is measured with the new taumeter at 225 GHz
For start:
- Working with the new pointing model (rms went from 5 to 2 arcsec for yesterday pointing session)
- Nasmyth offset 28, 28 implemented in the pointing model
- offset 0 0 /system nasmyth
Set pointing : 0, 0
NEW and definitive pointing model determined from yesterday
Set Focus : -1 mm
- Quick description of the session:
- Mars Pointing, focus, otfgeom.
- Secondary calibrators
- Bright extended source(s): Crab, NGC2023, OrionLBS
- Skydip
- Arp220
- Faint sources to measure noise figures (20-40 mJy range at 1mm)
- SZ on RXJ
At 12:50 the NCS process that control the adjustment of the M2 focus depending on the temperature gradient stopped without anybody noticing it (no alarm); this had no effect until the evening since the outside temperature was stable, but after sunset we lost about ~10 degrees in ~2 hours. Up to scan 178 everything was OK, but after integration on a faint source at scan 199 we found huge beams, we spent a significant time on various focus before figuring out that we had to move M2 by more than 3mm before finding again reasonable beams ! Such a big change of focus is very unusual, that's how we figured out the problem.
Scan |
UT |
Source |
Command |
Az |
El |
Pointing X, Y, Focus |
Tau225 |
Found |
Comment |
123 |
10h05 |
Mars |
Track |
133 |
69 |
0, 0, -2.4 |
0.84 |
|
tuning the KIDs, checking file transfer |
124 |
10h10 |
Mars |
Track |
133 |
69 |
0, 0, -2.4 |
0.84 |
|
|
125 |
10h19 |
Mars |
Track |
133 |
69 |
0, 0, -1 |
0.84 |
|
|
126 |
10h23 |
Mars |
Track |
139 |
71 |
0, 0, -1 |
0.84 |
|
|
127 |
10h26 |
Mars |
cross |
141 |
71 |
0, 0, -1 |
1.16 |
2mm -3 0 |
|
128 |
10h32 |
Mars |
pointliss |
|
|
-3, 0, -1 |
1.16 |
1 and 2mm -7 3 |
|
129 |
10h38 |
Mars |
cross |
149 |
73 |
-7, 3, -1 |
1.16 |
2mm -4,4 Map:-6,3 |
|
130 |
10h42 |
Mars |
pointliss |
152 |
73 |
-7, 3, -1 |
0.938 |
-2,2;-2,3 |
|
131 |
10h46 |
Mars |
pointliss |
154 |
73 |
-2, 3, -1 |
0.938 |
-5,-2;-5,-1 |
|
132 |
10h50 |
Mars |
pointliss |
|
|
-5, -1, -1 |
0.579 |
-8,6 |
sky is cloudy and noisy |
133 |
10h56 |
Mars |
pointliss |
163 |
74 |
-8, +6, -1 |
0.739 |
-5,-2;-5,-1 |
pointing keeps changing |
134 |
11h01 |
Mars |
faintliss |
167 |
74 |
-5, -1, -1 |
1.09 |
-6,2;-6,2 Fwhm 16.7,20 |
PSF spread is large |
135 |
11h09 |
Mars |
pointliss |
174 |
75 |
-6, +2, -1 |
1.09 |
-5,2;-5,2 Fwhm 15,19 |
|
136 |
11h16 |
Mars |
pointliss |
180 |
75 |
-6, +2, -1 |
1.09 |
-7,2;-6,2 Fwhm 16,20 |
|
137 |
11h20 |
Mars |
focusp2 |
184 |
75 |
-6, +2, -1 |
4?! |
-0.1?;-0.75 |
focus +-2mm Sky unstable at 1mmm |
138 |
11h45 |
Mars |
otfgeom |
205 |
73 |
-6, +2, -1 |
|
-7,4;-7,4 Fwhm 14.5 19.5 |
for lunch |
139 |
11h45 |
Mars |
otfgeom |
205 |
73 |
-6, +2, -1 |
|
|
cancelled. Scan never started. |
140 |
12h20 |
Mars |
otfgeom |
231 |
68 |
-6, +2, -1 |
|
|
stopped in the middle. Block in antenna |
141 |
12h48 |
Mars |
otfgeom |
231 |
68 |
-6, +2, -1 |
|
|
cancel |
142 |
13h03 |
Mars |
track |
244 |
62 |
-6, +2, -1 |
|
|
|
143 |
13h10 |
Mars |
otfgeom |
246 |
61 |
-6, +2, -1 |
|
|
many clouds resonances lost in the middle |
144 |
13h39 |
Mars |
track |
253 |
55 |
-6, +2, -1 |
|
|
resonances found by Nello |
145 |
13h41 |
Mars |
pointliss |
254 |
55 |
-6, +2, -1 |
|
0,9;-1,11 but uncertain |
|
146 |
13h44 |
Mars |
pointliss |
254 |
55 |
-2, +10, -1 |
0.841 |
-8,4 ? |
|
147 |
13h49 |
Mars |
pointliss |
256 |
54 |
-2, +10, -1 |
|
-8,2;-9,2 |
Went off resonance, sky so fluctuating |
148 |
14h04 |
Mars |
pointliss |
256 |
54 |
-9, +2, -1 |
|
-9,1;-9,1 |
lots of resonances lost |
149 |
14h08 |
Higelev |
track |
179.7 |
79.9 |
-9, +2, -1 |
|
|
Go to a stall position HO 180 80 and wait for an hour |
|
14h20 |
Higelev |
nothing |
179.7 |
79.9 |
-9, +2, -1 |
|
|
resonances OK, >14h42 no tuning |
150 |
16h32 |
3C279 |
track |
123 |
28 |
-9, +2, -1 |
|
|
resuming observations, sky a bit clearer |
151 |
16h32 |
3C279 |
pointliss |
|
|
-9, +2, -1 |
|
-8 0; -8 -1 |
not too far |
152 |
16h37 |
3C279 |
pointliss |
|
|
-8, 0, -1 |
|
-8 2; -8 0 |
ok |
153 |
16h42 |
3C279 |
cross |
|
|
-8, 0, -1 |
0.932 |
map -9 3;-9 1, X -9 2; -7 0 Fl 8,12Jy |
ok |
154 |
16h47 |
3C279 |
faintliss |
|
|
-8, 0, -1 |
0.84 |
-9 0;-10 1 |
|
155 |
16h55 |
3C279 |
focusp2 |
|
|
-9, 0, -1 |
|
-2?,-1~ |
+-2mm |
156-160 |
16h58 |
3C279 |
focusliss |
|
|
-9, 0, -1 |
0.914 |
-1.6 best trade-off |
-1,-1.6,-2.2,-0.4,0.2 |
161 |
17h12 |
3C279 |
pointliss |
|
|
-9, 0, -1.6 |
|
-8 -1;-8 -1 Fw15.7;19.8 Fl 11,12Jy |
|
162 |
17h16 |
3C279 |
otfgeom |
|
|
-8, -1, -1.6 |
0.892 |
|
cloudy but reso not lost |
163 |
17h27 |
3C279 |
faintliss |
137 |
37 |
-8, -1, -1.6 |
0.860 |
-5 0;-5 0 Fw16.8,20 Fl 10,18Jy |
|
164 |
17h39 |
IRC10216 |
track |
|
|
-5, 0, -1.6 |
|
|
|
165 |
17h40 |
IRC10216 |
pointliss |
|
|
-5, 0, -1.6 |
|
-6 2;-5 1 FW25arcsec,Fl 3.6,0.7Jy |
Extended? |
166 |
17h43 |
IRC10216 |
faintliss |
|
|
-5, +1, -1.6 |
|
-6 3;-7 2 Fw22,26 Fl4,0.7Jy |
|
167 |
17h49 |
IRC10216 |
faintliss |
|
|
-5, +1, -1.6 |
|
-5 2;-5 2 |
|
168 |
17h56 |
M82 |
track |
347 |
56 |
-5, +1, -1.6 |
|
|
|
169 |
18h01 |
M82 |
pointliss |
347 |
55 |
-5, +1, -1.6 |
0.829 |
|
look ok |
170 |
18h03 |
M82 |
faintliss |
347 |
55 |
-5, +1, -1.6 |
0.810 |
|
|
171 |
18h10 |
M82 |
faintliss |
345 |
55 |
-5, +1, -1.6 |
0.894 |
fl1.2,0.5Jy |
|
172-173 |
18h17 |
M82 |
otf3x3 |
345 |
55 |
-5, +1, -1.6 |
0.840 |
|
Az and El 3x3 arcmin scans |
174 |
18h30 |
M87 |
track |
154 |
63 |
-5, +1, -1.6 |
0.894 |
|
Readout Box rebooted |
175 |
18h49 |
M87 |
faintliss |
164 |
64 |
-5, +1, -1.6 |
|
|
all right |
176 |
18h55 |
0923+392 |
track |
285 |
58 |
-5, +1, -1.6 |
0.822 |
|
|
177 |
19h01 |
0923+392 |
pointliss |
285 |
58 |
-5, +1, -1.6 |
|
-5,+2; -4,+2 |
|
178 |
19h03 |
0923+392 |
faintliss |
286 |
56 |
-4, +2, -1.6 |
|
-6,+2; -6,+2, Fw13.6,17.3arcs,Fl6.3,5.5Jy |
|
179 |
19h08 |
HLS091828 |
track |
308 |
54 |
-6, +2, -1.6 |
|
|
|
180-181 |
19h13 |
HLS091828 |
faintlisst |
308 |
54 |
|
|
|
faintliss followed by a track to tune resonances |
182-183 |
19h17 |
HLS091828 |
faintlisst |
308 |
53 |
|
|
|
detected at 1 and 2mm |
184-185 |
19h24 |
HLS091828 |
faintlisst |
308 |
52 |
|
|
|
|
186-187 |
19h30 |
HLS091828 |
faintlisst |
308 |
51 |
|
|
|
|
188-189 |
19h36 |
HLS091828 |
faintlisst |
308 |
50 |
|
|
|
|
190-191 |
19h42 |
HLS091828 |
faintlisst |
308 |
49 |
|
|
|
|
192-193 |
19h50 |
HLS091828 |
faintlisst |
308 |
48 |
|
|
|
|
194-195 |
19h59 |
HLS091828 |
faintlisst |
308 |
47 |
|
|
|
|
196-197 |
|
HLS091828 |
faintlisst |
308 |
47 |
|
|
|
|
198 |
20h11 |
0923+392 |
track |
291 |
43 |
-6 -2 -1.6 |
0.659 |
|
|
199 |
20h11 |
0923+392 |
faintliss |
291 |
43 |
-6 -2 -1.6 |
0.659 |
-7,2;-7,0 Fw23,19 Fl2.3,4.1Jy |
|
200-203 |
20h18 |
DIY |
skydip scan 202 |
291 |
|
-6 -2 -1.6 |
0.677-0.614 |
|
No problem |
204 |
20h27 |
0923+392 |
track |
292 |
40 |
-6 -2 -1.6 |
0.659 |
|
|
205 |
20h28 |
0923+392 |
pointliss |
292 |
40 |
-7 0 -1.6 |
0.640 |
2mm: -8,1 |
|
206 |
20h30 |
3C279 |
track |
198 |
45 |
-7 0 -1.6 |
0.594 |
|
|
207 |
20h34 |
3C279 |
pointliss |
199 |
45 |
-7 0 -1.6 |
|
-9 2;-9 1;Fw 27,20;Fl7,14Jy |
|
208 |
20h38 |
3C279 |
focusp2 |
199 |
45 |
-7 0 -1.6 |
|
0.27 -0.67 |
Big change as expected |
209 |
20h42 |
3C279 |
pointliss |
201 |
45 |
-9 2 -0.5 |
|
|
Very large beams? |
210 |
20h47 |
3C279 |
focusp2 |
203 |
44 |
-9 2 -0.5 |
|
-2.4 -1.9 |
|
211 |
20h49 |
3C279 |
focusp |
203 |
44 |
-9 2 -2.0 |
|
-1.3 ? |
|
212-216 |
20h54 |
3C279 |
focusliss |
203 |
44 |
-9 2 -2.0 |
|
Focus is -2.7!! |
-1.5,-2.1,-2.7,-0.9,-0.3 two last scans many 1mm pixels lost |
217 |
21h08 |
3C279 |
focusp |
209 |
42 |
-10 -1 -3.0 |
|
-2.5 found 1mm |
|
218 |
21h13 |
3C279 |
pointliss |
211 |
42 |
-10 -1 -2.5 |
|
-13 1;-13 1Fw23,22Fl11,19Jy |
strange |
219-223 |
21h21 |
3C279 |
focusliss |
213 |
41 |
-10 -1 -2.5 |
|
-7,0 -3.7! |
-2.5 -3.1 -3.7 -1.9 -1.3 |
224-228 |
21h21 |
3C279 |
focusliss |
213 |
41 |
-10 -1 -2.5 |
0.490 |
-4 1 foc:-3.5 |
-4 -4.6 -5.2 -3.4 -2.8 |
229 |
21h21 |
3C279 |
focusliss |
220 |
38 |
-4 -1 -3.5 |
|
|
canceled reboot kid readouts + see note above |