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NIKA October 10th, 2014 / S4

Back to list of day to day logbook of observations

2014-10-10

Opacity is measured with the new taumeter at 225 GHz

Nasmyth offsets : -19, 5.8

Set pointing : 0, 0

Set Focus : -2.4 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, and since MPPSync is dead, we will turn the HWP by hand when we start polarised observations.

Data Repository: Raw_X9

Acquisition = 39.7 Hz

Observing account: t21

Remark after few scans: TAPAS is working now, we see the scans, but we continue the manual log just in case.

Scan	UT	Source	Command	Az	El	Pointing X, Y, Focus	Tau225	Comment
1-3	00h46	Uranus	Track off -200 -200	208	54	0,0,-2.4	0.2	Tuning. We started a bit late, the time that ice melts and sky clears !
4	00h50	Uranus	cross	208	54	0,0,-2.4	0.2
5	00h56	Uranus	cross	213	53	0,0,-2.4	0.1	Problem processing the scan
6	01h00	Uranus	cross	213	53	0,0,-2.4	0.1
7	01h03	Uranus	cross	213	53	-2.5,6.4,-2.4	0.1	set pointing -2.5 6.4
8	01h08	Uranus	focusp	213	53	-2.5,6.4,-2.4	0.1
9	01h03	Uranus	cross	213	53	-2.5,6.4,-2.0	0.1	set focus -2.0
10	01h08	Uranus	focusp	213	53	3.5,-3.8,-2.0	0.1	Jumps in data, bad for processing
11	01h17	Uranus	focusp	220	51	3.5,-3.8,-2.0	0.1
12	01h25	Uranus	otfgeom_25	220	49	3.5,-3.8,-2.0	0.1	surely defocussed, but useful to debug holes with dataprocessing
13	01h38	Uranus	focusp	225	48	3.5,-3.8,-2.0	0.1
14-18	01h45	Uranus	focusliss	225	48	3.5,-3.8,-2.0	0.1
19-23	01h52	Uranus	focusliss	230	48	3.5,-3.8,-1.4	0.1
24-28	01h55	Uranus	focusliss	230	48	3.5,-3.8,-0.6	0.1	we were visibly completely out of focus in preceeding scans
29	02h10	Uranus	cross	235	41	3.5,-3.8,-0.6	0.2
30	02h20	Uranus	cross	235	41	-2.3,6.2,-0.6	0.2
31	02h25	Uranus	focusp	240	38	-2.3,6.2,-0.6	0.2	say focus -0.77
32	02h28	Uranus	otfgeom_25	240	38	-2.3,6.2,-0.6	0.2
33	02h49	Uranus	otf3x3	240	38	-2.3,6.2,-0.6	0.2	HWP in reference position (Andrea in cabin to rotate by hand)
34	02h54	Uranus	otf3x3	240	38	-2.3,6.2,-0.6	0.2	HWP in reference position
35	03h01	Uranus	otf3x3	240	35	-2.3,6.2,-0.6	0.2	HWP ref + 7 steps anti-clockwise (facing cryostat)
36	03h07	Uranus	otf3x3	240	35	-2.3,6.2,-0.6	0.2	HWP ref + 7 steps anti-clockwise (facing cryostat)
37	03h16	Uranus	otf3x3	240	31	-2.3,6.2,-0.6	0.2	HWP ref + 14 steps anti-clockwise (facing cryostat)
38	03h20	Uranus	otf3x3	240	31	-2.3,6.2,-0.6	0.2	HWP ref + 14 steps anti-clockwise (facing cryostat)
39	03h25	Uranus	otf3x3	240	28	-2.3,6.2,-0.6	0.2	HWP ref + 21 steps anti-clockwise (facing cryostat)
40	03h29	Uranus	otf3x3	240	28	-2.3,6.2,-0.6	0.2	HWP ref + 21 steps anti-clockwise (facing cryostat)
41	03h35	0234+285	track -200 -200	263	60	-2.3,6.2,-0.6	0.2	this quasar had 10% polarization at 2mm on Aug 22
42	03h38	0234+285	otf3x3	263	60	-2.3,6.2,-0.6	0.2	HWP ref + 0 steps anti-clockwise (facing cryostat)
43	03h41	0234+285	otf3x3	263	60	-2.3,6.2,-0.6	0.2	HWP ref + 0 steps anti-clockwise (facing cryostat)

-  ⇤ ← Revision 9 as of 2014-10-13 03:30:28 → 
  Size: 5396
  Editor: NikaBolometer
  Comment:
+   ← Revision 10 as of 2014-10-13 03:48:36 → ⇥
  Size: 5968
  Editor: NikaBolometer
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 58:
+||   41     || 03h35  ||    0234+285     ||  track -200 -200          ||  263   ||  60    || -2.3,6.2,-0.6            ||   0.2      || this quasar had 10% polarization at 2mm on Aug 22  ||
||   42     || 03h38  ||    0234+285     ||  otf3x3                   ||  263   ||  60    || -2.3,6.2,-0.6            ||   0.2      || HWP ref + 0 steps anti-clockwise (facing cryostat)  ||
||   43     || 03h41  ||    0234+285     ||  otf3x3                   ||  263   ||  60    || -2.3,6.2,-0.6            ||   0.2      || HWP ref + 0 steps anti-clockwise (facing cryostat)  ||