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NIKA, January 25th, 2014 / S6

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2014-01-25

TAPAS database, will be completed on Monday. Continue with manual log below.

Programm for today. View the poor weather conditions that prevented us to follow the program listed in the observation plan, we (SL) reorganise it. We will do continuum observations only (without the polariser).

Skydip.
Focus and Beam maps on Uranus. Centered on the refence detector: #494 of the 2mm array (#5 of the 1mm array is very close to it).
If the weather allows, resume pointing session.
If the weather allows, beam maps on Uranus: on focus 1st then investigation of 3D focus (=> 18 scans).
If weather not excellent but good enough for observations: quick test for the TAPAS data base, change project from t21 to 193-13 (Israel's project for the pool in Feb) do a Lissajou scan on any bright source nearby and check that the scan appears in the right table of the pool database. Then back to project t21.
If weather not excellent but good enough for observations: photometric calibration on primary and secondary calibrators with Lissajous scans and small OTF maps (Az El and/or few RA DEC for testing). Some secondary to observe: W3OH, K3-50A, MWC349, CRL2688, NGC7027, CepA, NGC7538.
If weather not excellent but good enough for observations: check geom on CygA (and possibly M82 again).
If weather not excellent but good enough for observations: test various scan speed 10, 20, 30, 40, 50, 60 arcsec/s, first on bright quasar with geom (e.g. 3C454.3, 3C84, OJ287, 3C111), then on extended sources with large OTF zigzag (e.g. CygA, CasA, Crab, possibly M82 again).
If weather not excellent but good enough for observations: test various OTF Zig Zag orientations; in particular Ra Dec scan on NGC891.

Note: view the numerous polar obs done yesterday in rather good weather conditions, no polar observations foreseen today. Wait for Feedback from NIKA team in Grenoble for possible plan of additional polar obs tomorrow or day after tomorrow.

Remark for NIKA staff: Good data are on RAW_X9

OFFSET -37 -30 /sys Nasmyth => select detector 494 as reference

Scan	UT	Source	Command	Pointing X,Y, Focus	Comment
118-119	15h30	DIY-Tip	skydip_updown	0 0, -1.4	OFFSET -37 -30 /sys Nasmyth. error in scan 118: "-1 blocs manquants". pipeline can't fit skydip down (scan 119)
120	15h45	DIY-Tip	skydip_up	0 0, -1.4	find tau 0.44 @ 1mm ~ tau meter, 0.36 @ 2mm
121	15h55	Uranus	cross	0 0, -1.4	find pointing -55 -35 ! Normal: typo in Nasmyth offsets: -37 30 => OFFSET -37 -30 /sys Nasmyth
122	16h00	Uranus	cross	0 0, -1.4	find pointing -2.3 -1.6 => OK now these values are in the expected range.
123	16h06	Uranus	pointliss	-2.3 -1.6, -1.4	find pointing -5 -1.1 (accumulate stat for comparison between both method)
124	16h10	Uranus	focusp	-5 -1.1, -1.4	find focus -1.42 @ 1mm, -0.97 @ 2mm. Very noisy; turbulent blue sky, wind.
125-129	16h16	Uranus	focusliss	-5 -1.1, -1.4	find focus -1.23 @ 1mm, -0.56 @ 2mm (accumulate stat for comparison between both method)
130	16h25	Uranus	cross	-5 -1.1, -1.2	find pointing -4.6 2.1
131	16h30	Uranus	pointliss	-5 -1.1, -1.2	find pointing -5.5 3.2. Alain update RAW_X10 to test fix of file timing problem encountered yesterday.
132	16h35	Uranus	otfgeom	-5 3, -1.2
133	16h35	Uranus	otfgeom	-5 3, -1.2	good file in X33, some "?" in the data control screen of X9 and X10 = some corruptions in the files; good file recovered from X33 at end of session, imbfits regenerated.
134	16h50	Uranus	cross	-5 3, -1.2	find pointing -3.2 3.7
135	16h50	Uranus	pointliss	-5 3, -1.2	find pointing -2.2 4.1
136	17h10	Uranus	focusp	-2.8 3.9, -1.2	find focus -1.07 @ 1mm, -1.08 @ 2mm
137-141	17h20	Uranus	focusliss	-2.8 3.9, -1.2	not usable. We have found the corruption problem: do not transfer files from X9 and X10 for local analysis during a scan
142-146	17h30	Uranus	focusliss	-2.8 3.9, -1.2	find focus -0.3 @ 1mm, -0.4 @ 2mm => 1mm shift on M2 is prety big (Zemax shows huge effect on beam); is it due to sunset or wind ?
147	17h44	Uranus	pointliss	-2.8 3.9, -1.2	find pointing -2.0 5.9. before scan set project 193-13 to check scan info goes in Israel's project in the TAPAS and Pool databases => NO
148	17h45	Uranus	pointliss	-2.8 3.9, -1.2	find pointing -1.2 5.1. before scan set project t21 => back to our default ID. => in the databases: 147 is in t21, and 148 in 193-13 !!!
149	17h50	Uranus	focusp	-2.8 3.9, -0.7	start with focus intermediate between 2 preceding focus scans, find focus -1.7 @ 1mm, -1.3 @ 2mm
150-152	17h55	Uranus	focusliss	-2.8 3.9, -0.7	scan canceled: too much wind, observations stopped
153-157	18h10	Uranus	focusliss	-2.8 3.9, -0.7	still windy, test if obs possible. find focus -1.06 @ 1mm, -0.79 @ 2mm. tracking errors important at Lissajous turns.
158	18h26	Uranus	cross	-2.8 3.9, -1	test crosses speed in windy conditions. 120/16 = 7.5"/s (default in cross script) no 2mm data: NIKEL 2 crashed
159	18h26	Uranus	cross	-2.8 3.9, -1	test crosses speed in windy conditions. 120/16 = 7.5"/s no 2mm data: NIKEL 2 crashed
160	18h35	Uranus	cross	-2.8 3.9, -1	test crosses speed in windy conditions. 120/16 = 7.5"/s find pointing 0.9 6.0 Attention data on X9 corrupted, data on X10 OK, good file recovered at end of session, imbfits regenerated.
161	18h35	Uranus	cross	-2.8 3.9, -1	test crosses speed in windy conditions. 120/16 = 7.5"/s find pointing 1.4 5.0 data on X9 corrupted, data on X10 OK => NIKEL restarted from X10, params needed to be broadcast to X9. good file recovered at end of session, imbfits regenerated.
162	18h35	Uranus	cross	-2.8 3.9, -1	test crosses speed in windy conditions. 120/16 = 7.5"/s find pointing 0.6 5.4
163	18h40	Uranus	cross	-2.8 3.9, -1	test crosses speed in windy conditions. 120/16 = 7.5"/s find pointing 1.4 5.4 scan not on X9 but on X10 => Alain fix on timing problem works, use X10 from now on; re-run nika_filing from X10 for imbfits
164	18h50	Uranus	cross	-2.8 3.9, -1	test crosses speed in windy conditions. 240/16 = 15"/s find pointing 1.1 3.4 (holes in data => flag out of res, big sky variation)
165	18h55	Uranus	cross	-2.8 3.9, -1	test crosses speed in windy conditions. 240/16 = 15"/s find pointing 1.0 3.2 (holes in data => flag out of res, big sky variation)
166	18h55	Uranus	cross	-2.8 3.9, -1	test crosses speed in windy conditions. 240/16 = 15"/s find pointing 2.0 3.3 (big fluctuations in timelines. suggestion for offline processing: cut all to 120" around source and see how it improves)
167	18h56	Uranus	cross	-2.8 3.9, -1	test crosses speed in windy conditions. 240/16 = 15"/s find pointing 1.5 5.2 (check vertical blue bar in 4th subscan timeline from run_pointing.pro)
168	19h00	Uranus	cross	-2.8 3.9, -1	test crosses speed in windy conditions. 480/16 = 30"/s find pointing 2.6 4.4 (fog is also there now...) : fit looks good !
169	19h00	Uranus	cross	-2.8 3.9, -1	test crosses speed in windy conditions. 480/16 = 30"/s find pointing canceled, too windy, observations stopped. Icy fog: need turn on antenna de-icer
	21h00				wind not too bad on plot from IRAM weather page, but station anemometer screened to north wind; measure with the manual anemometer just outside the control room: 15-20 m/s regular with peaks at 25m/s => no obs possible
170	23h16	3c84	cross	0 0, -2.4	wind decreasing. test obs. canceled cross was still 480/16 = 30"/s, focus @ -2.4
171	23h16	3c84	cross	0 0, -1	cross @ 120/12 = 10"/s (use that as default now) find pointing -44 -2 => forgot again Nasmyth offset !
172	23h16	3c84	cross	0 0, -1	find pointing 1.8 -1.1
173	23h24	3c84	focusp	1.8 -1.1, -1	find focus -1.3 @ 1mm -1.24 @ 2mm
174-178	23h30	3c84	focusliss	1.8 -1.1, -1.3	find focus -1.7 @ 1mm -1.3 @ 2mm
179	23h35	3c84	cross	1.8 -1.1, -1.7	find pointing 2.7 -0.7
180	23h40	3c84	pointliss	1.8 -1.1, -1.7	find pointing 4 -1.0
181	23h45	3c84	otfgeom	3 -1, -1.7	histogram FWHM vs Number of detectors peak is at ~12" @ 1mm, ~18.5" @ 2mm
182	23h57	3c84	otfgeom	3 -1, -1.3	histogram FWHM vs Number of detectors peak is at ~13" @ 1mm, ~18.2" @ 2mm => focusliss give better result, though FWHM still 30% bigger than theory...