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Daily Reports

IRAM staff at Pico:

OoD until Tuesday morning: Gloria Liñan (day), Joaquin Santiago (night)

OoD for the rest of the week: Enrique Lobato (day), Pedro Martinez (night)

Rx & Astro: Dave John, Carlos Duran, Miguel Sanchez, Pablo Torne, Angel Bongiovanni

Relevant hardware conditions at starting:

• An improvement of air pipes, wiring, sensors and control systems of the vertex are being finished by Rx team along this week. Styrofoam membrane has been relocated in standard position before NIKA2 observations. No petals installed yet in the vertex. Some pieces of foam layers need to be replaced between the petals and the styrofoam membrane.
• 15:30 (LT): Last NIKA2 cooling down steps (DJ): turning on amplifiers of 1 mm arrays. No evident PT noise. Bad KIDs (window closed): 16, 1, 25 (ar1, 2, 3)
• 20:20 (LT): Opening NIKA2 window, El. 60 deg. Waiting for a final T_MC stabilization (172 mK). Bad KIDs: 30, 3, 43 (ar1, 2, 3)

August 12th, Monday

21:10 - Miguel, Angel: Starting with tau225GHz~0.45; a drop is expected. Mild wind speed (~6-8 m/s). DAQ restarted—bad KIDs: 31, 4, 35 (ar1, 2, 3). The NIKA2 pointing model is not updated. First pointing try was on 1741-038. The only issues at the beginning were related to a bad indent issue in the make_IMBFITS_nika.py code and a high deviation of the source in El. (~80") in the first map. It was fixed after repositioning M3 & M4.

Summary:

• Relatively stable atmosphere over the night, with several short periods of instabilities/opacity spikes

• Sidelobes max. values are fairly well contained in maps at mean elevations (<6% at 2 mm and <12% at 1 mm)

• Bad scans (tracking deviations >20%): 20240812s169 and 20240813s1, s2, s7, although wind speed was <9 m/s in all cases.

• Scan with invalid antenna traces: 20240812s199
• High elevation scans (azel system) revisited. The maximum scan speed allowed (i.e. under the current NCS capabilities) as a function of elevation is as follows. Any attempt must be limited to El. = 89 deg:

  Elevation (deg)	Scan speed (arcsec/s)
  80	30
  83	20
  84	15
  86	10
  88	10

• Likely valid calib_1scan:

  • NGC7027: 20240812s189
    

    MWC349: 20240812s190
    

    CRL2688: 20240812s191
    

    Uranus: 20240813s8
    

    Neptune: 20240813s4, 20240813s17
    

• Beam maps:

  • 2251+158: 20240812s213
    

    Uranus: 20240813s29
    

06:15: NIKA2 session finished for giving a chance to complete EMIR calibration sequences on Uranus & Mars

August 13th, Tuesday