NIKA November 2012 S2

[[D2DLogNika5 |Back to list of day to day logbook of observations]]

== 2012-11-15 ==

 .Cryostat Temperature: 150 +/- 0.02 mK (regulated with power 50uW), looks to be a better compromise between 2mm array and 1mm array optimal temperature.
 .Arrays status tonight: 126 pixels 2mm - good noise; 90 pixels 1mm noise 2x optimal (limited number of pixels and excess noise due to cold amplifier saturation --> -62dBm per KID instead of -50dBm).

Nasmyth offsets : 0, 0

Set pointing : 0, 0

Set Focus : -2.40 mm

 .Quick description of the session: Test the Pako sequences, data flows, and generation of IMBFITS. Start observing procedures described in [[ListOfAstroTarget2012N5]]. 
 .At 20h40 UT: the sky was stable enough to check the alignment radiometrically by measuring the background on the sky and finding the minimum (spill over the primary) by moving M5; conclusion: we were slightly misaligned previously, with the new position of M5 we gained ~2K on the background.

||'''Scan'''||'''UT'''||'''Source'''||'''Command''' ||'''Az'''||'''El'''||'''Pointing X, Y, Focus'''||'''Tau'''||    '''Comment'''         ||
||     60  ||  16h17 ||  Mars      || Track        ||  207   ||  23    ||                  ||   0.2  || ||
||     61  ||  16h30 ||  Mars      || OTF_geomfast ||  209   ||  22    ||                  ||   0.22  || 420"x 220" (step 6") in 36 subscans x 14 s = 9+3 ~= 12 min ||
||     62  ||  16h47 ||  Neptune   || Track        ||  144   ||  33    ||                  ||   0.20  || ||
||     63  ||  16h49 ||  Neptune   || OTF_geomfast ||  145   ||  34    ||                  ||   0.20  || ||
||     64  ||  17h05 ||  Neptune   || OTF_2x2      ||  149   ||  35    ||                  ||   0.20  || ||
||     65  ||  17h23 ||  DIY-Tip   || DIY-Tip      ||        ||        ||                  ||   0.20  || Hans test of Sky dip with tune||
||     66  ||  17h   ||  DIY       || DIY          ||        ||        ||                  ||   0.20  || Hans test of tune||
||     67  ||  17h   ||  DIY-Tip   || DIY-Tip      ||        ||        ||                  ||   0.20  || Hans test of Sky dip with tune||
||     68  ||  17h51 ||  Uranus    || Track        ||  120   ||  35    ||                  ||   0.10  || ||
||     70  ||  17h58 ||  Uranus    || OTF_geometry ||  121   ||  36    ||                  ||   0.12  || stopped because there were tunnings durin the scan||
||     71  ||  18h02 ||  Uranus    || OTF_geometry ||  122   ||  37    ||     ||   0.12  || 300"x 220" (step 4") in 56 subscans x 20 s = 19+3 ~= 22 min.||
||     72  ||  18h35 ||  Uranus    || OTF_geometry ||  122   ||  37    ||     ||   0.12  || redo because telescope stuck at middle of scan 71||
||     73  ||  18h39 ||  Uranus    || OTF_geometry ||  122   ||  37    ||     ||   0.12  || telescope stopped again, impossible to move it, AS investigate||
||     74  ||  19h15 ||  Uranus    || OTF_geometry ||  122   ||  37    ||     ||   0.12  || AS solved the problem ||
||     75  ||  19h25 ||  Uranus    || OTF_geom_below70degEl ||  145   ||  49    ||     ||   0.12  || try a fast geom 35"/s, 420" large Az base, 4" El step ||
||     76  ||  19h40 ||  Uranus    || OTF_geom_below70degEl ||  145   ||  49    ||     ||   0.11  || same as above ||
||     77  ||  20h   ||  Uranus    || Cross      ||  160   ||  52    ||         ||   0.12  || Cross scan to determine Nastmyth pointing offset ||
||     78  ||  20h30 ||  Uranus    || OTF_2x2     ||  169   ||  53    ||      ||   0.12  || small OTF to accumulate statistics while Nicolas work on the cross ||
||         ||  20h40 ||  || || || || || ||     '''Optimize radio alignment moving M5 micrometric screws, minimize background => gain 2K '''||
||     79  ||  20h56 ||  Uranus    || Cross      ||  160   ||  52    ||        || 0.12  || found -3 3 offset on scan 77, but redo with 0 0 since M5 has moved ||
||     80  ||  21h07 ||  Uranus    || Cross      ||  160   ||  52    ||        || 0.12  || with pointing offset3 3 to check Nicolas calculation ||
||     81  ||  21h11 ||  Uranus    || Cross      ||  160   ||  52    ||        || 0.12  || redo same, high sky noise on previous scan ||
||     82  ||  21h19 ||  Uranus    || Cross      ||  160   ||  52    ||        || 0.12  || do a 2nd one to check stability ||
||     83  ||  21h27 ||  Uranus    || Cross      ||  160   ||  52    ||        || 0.12  || set pointing 6 6 ||
||     84  ||  21h27 ||  Uranus    || Cross      ||  160   ||  52    ||       || 0.12  || set pointing 8.64 10.67 => pixel 453 2mm should be at center => it works ||
||     85  ||  21h37 ||  Uranus    || Focus 2    ||  160   ||  52  ||       || 0.12  || test a focus (procedure to reduce it not ready, but needed for the test) ||
||     86  ||  21h47 || 0316+413 = 3C84 || Track ||  69   ||  65  ||     || 0.12  || start accumulate stat on pointing  ||
||     87  ||  21h50   || 0316+413 = 3C84 || Cross ||  69   ||  65  ||    || 0.12  || remark: focus not reduced but had 17" FWHM on 2mm crosses => should be correct for 1st iteration on pointing ||
||     88  ||  21h53  || 0528+134 || Track ||  38   ||  116  ||     || 0.1  ||  ||
||     89  ||  21h56  || 0528+134 || Cross ||  38   ||  116  ||     || 0.1  ||  ||
||     90  ||  21h58  || 0528+134 || Cross ||  38   ||  116  ||     || 0.1  || redo: source too weak on 1st cross profile  ||
||     91  ||  22h00  || 0235+164 || Track ||  65   ||  140  ||     || 0.1  ||  ||
||     92  ||  22h03  || 0235+164 || Cross ||  65   ||  140  ||     || 0.1  ||  ||
||     93  ||  22h05 || 2251+158 = 3C454.3 || Track ||  250   ||  48  ||     || 0.07  ||  ||
||     94  ||  22h14  || 2251+158 = 3C454.3 || Cross ||  250   ||  48  ||     || 0.07  || acquisition crashed ||
||     95  ||  22h17  || 2251+158 = 3C454.3 || Cross ||  250   ||  48  ||     || 0.07  || redo ||
||     96  ||  22h20  || Uranus || Track ||  215   ||  48  ||     || 0.07  || Goal: redo an OTF geometry since we moved M5 ||
||     97  ||  22h23  || Uranus || Cross ||  215   ||  48  ||     || 0.07  || take the occasion to use as pointing ||
||     98  ||  22h26  || Uranus || Focus ||  215   ||  48  ||     || 0.07  || take the occasion to have a 2nd focus scan for Nicolas ||
||     99  ||  22h28  || Uranus || OTF_geom_below70degEl ||  215   ||  48  ||     || 0.07  || geometry ||
||     100  ||  22h44  || Uranus || OTF_geom_below70degEl ||  222   ||  45  ||     || 0.07  || geometry ||