NIKA run #2 (13. - 25. Oct 2010, week 42)

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Test run plan: 14.10. - 25.10.2010

Telescope Schedule

color table of the Run schedule

Staffing of the test run (DRAFT by CK, 2.9.2010)

The total number of rooms at the Pico is 14.

• IRAM/Granada (9 rooms minimum during the week, 7 rooms at weekends):
  • Operators: J.L.Santarén (day time), F.Damour (night time) (2 rooms)
  • J.Penalver (1 room, Mon-Wed), S.Sanchez (Wed-Fri)
  • Astronomers of Duty / Friend of the instrument: D.Riquelme or G.Quintana-Lacaci (1 room)
  • Receiver group: Dave John or Santiago Navarro ? (1 room)
  • Computer group: Walter Brunswig or Albrecht Sievers ? (1 room)
  • Additional 2 rooms are the minimum needed for cooks and cleaning personal.
• IRAM/Grenoble: Samuel Leclercq or Markus Roesch or Robert Zylka or Karl Schuster ? (2 at a time, 2 rooms)
• Visitors from Neel, LAOG, AIG Cardiff, SRON Utrecht, Groningen: *upto 4 rooms during the week* may be used by the visitors. Double occupancy is an option, but the cooks would need to be informed beforehand of this extra load. If more visitors are essential, they'd need to stay over night in the nearby ski resort Pradollano, e.g. at the hotel Kenia.

color table of the NIKA staff schedule

List of astronomical target (Final by FXD, 14.10.2010)

ListAstroTarget

Above information plus more details (logistics, preparation of the run, sources list) on the following pdf document

Test plan 2010 10 (updated 14 Oct 2010)

Daily reports

Thursday, Oct 14

• Everybody has arrived at the telescope, computers and network installation in the control room done, electrical connection of the instrument checked, NIKA is ready to be lifted to the receiver cabin.

  15h-18h: Lift NIKA in the receiver cabin & install it on the optical bench. Alignment with the laser: wrong tilt for M8, will be fixed tonight. Electric checks OK. Pump, start cool down.

Friday, Oct 15

• The wrong tilt of M8 was corrected during the night thanks to the addition of small aluminum support plates (see picture below). We simulated in Zemax the effect of several millimeter and tenth of degree error in the position of M8 and showed insignificant increase of aberrations. The helium consumption is at least twice higher than expected, maybe due to a small thermal shortcut between the 77K and 4K stages. For the moment we can live with that, let see how it evolve with time. Detectors are cold in the morning and show resonances ! On the picture below the resonances of the 2mm array appear on the red-background window and the 1mm array in the pink-background window. At 14h we go in the cabin to re-install the NIKA mirrors, do the laser alignment, change the helium bottles. Then we perform two scans on Mars. Beside a very fluctuating background due to a cloudy sky, we see it ! Mars appear as little bumps on the time-traces on the picture below of an orange background window. We give back the telescope to the next heterodyne project, and start working on these first light data.

Saturday, Oct 16

• Good news: the helium consumption is not as bad as we feared, it takes actually more than 12h between 2 refills, so there no problem at all. Work on software (data acquisition CAMADIA, log files, timing questions...). Observations in the afternoon starts with Saturn: it's there, it's nice and apparently where we expect it to be. Track and scans on Saturn, Mars, 3C345, 3C273. Fine tunings on CAMADIA necessary but observations looks globally pretty nice at least on the time traces (see for example Mars traces below). Too bad it was mostly cloudy. The two last days the clouds arrived in the afternoon, so tomorrow we'll take a morning slot hoping to test the instrument on a better sky (C.Thum and PI's from the project scheduled in the morning have been informed). Work on the quick look data processing of CAMADIA, produce the first map in the evening. The image below show a scan on Mars on one pixel and on 64 pixels of the 2mm array, the orange traces on each side of mars are due to the low-pass causal filter used to suppress mostly the sky noise. Most pixels of both arrays see the sources.