NIKA October 10th, 2015 / S1

Back to list of day to day logbook of observations

2015-10-10


Following not updated

.Cryostat Temperature: 170mK cooling down slowly

Modulation frequency: 10kHz 1mm, 5kHz 2mm

Opacity is measured with the new taumeter at 225 GHz

Nasmyth offsets : 0, 0

Set Focus : we start at -2mm (not at all optimised, first task is try to improve on this!)


Data Repository: /home/nika2/NIKA/Data/run13_X/scan24_X

Scan

UT

Source

Command

Az

El

Pointing X, Y, Focus

Tau225

Comment

144-148

12h10m

Mars

FocusLissold

240

46

0,0,-2

0.7, increasing... :-(

checking focus, centered at -2, steps 0.6

149-153

12h10m

Mars

FocusLissold

240

46

0,0,-0.8

0.7, increasing... :-(

checking focus, centered at -0.8, steps 0.6

154

12h10m

Mars

OTFgeom

243

43

0,0,-0.8

0.7

we make a 'focus by hand' procedure, making at each step a small OTFgeom (NO lissajous!) so that then we can make maps pixel by pixel, less affected by the geometry (that we still do not know!)! first step: focus -0.8