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ALMA Sensitivity

  • "Numbers" webpage from ALMA website
  • Table of ALMA Observing Bands (Dec 2006).

  • Table 1: ALMA Receiver Bands

    Band
    Number
    Frequency Range
    (GHz)
    Wavelength
    (mm)
    Instantaneous
    Bandwidth (GHz)
    Configuration
    131.3 - 45.0 6.7 - 9.6 1 x 8 SSB
    267 - 90 3.3 - 4.5 1 x 8 SSB
    384 - 116 2.6 - 3.6 2 x 4 2SB
    4125 - 163 1.8 - 2.4 2 x 4 2SB
    5163 - 211 1.4 - 1.8 2 x 4 2SB
    6211 - 275 1.1 - 1.4 2 x 5.5 2SB
    7275 - 373 0.8 - 1.1 2 x 4 2SB
    8385 - 500 0.6 - 0.8 2 x 4 2SB
    9602 - 720 0.4 - 0.5 2 x 8 DSB
    10787 - 950 0.3 - 0.4 2 x 8 DSB

    SSB - Single sideband
    2SB - both sidebands detected separately
    DSB - Double sideband

    At least two of Bands 3, 6, 7 and 9 will be available for Early Science (~2009 Q3). These four plus bands 4 and 8 will be available at full science operations in 2012. Bands 1 and 2 will be developed in the future.

  • Table of ALMA Correlator set-ups. From ALMA Memo Series No. 556: "Observational Modes Supported by the ALMA Correlator"



  • Table of ALMA Sensitivity Goals for the 12 m Array (Dec 2006): For an integration time of 60 seconds, a spectral resolution of 1 km s-1, the RMS flux density, ΔS, and the brightness temperature sensitivity, ΔT, with a 64 antenna array and maximum baseline Bmax, are given in Table 4:

  • Table 4: ALMA Sensivity Goals for the 12 m array*

    Frequency Continuum Spectral Line Bmax = 0.2 km
    Bmax = 14.7 km
    (GHz) ΔS (mJy) ΔS (mJy) Beam (arcsec)ΔTcont(K) ΔTline(K) Beam (arcsec) ΔTcont(K) ΔTline(K)
    110 0.047 7.03.18 0.00050.0700.038 3.3482
    140 0.055 7.12.50 0.00050.0710.030 3.8495
    230 0.100 10.21.52 0.00100.1040.018 6.9709
    345 0.195 16.31.01 0.00200.1670.01213.51128
    409 0.296 22.60.86 0.00310.2340.01020.51569
    675 1.042 62.10.52 0.01080.6410.00672.24305


    *Data retreived using the ESO ALMA Senstivity Calculator at: ESO Calculator


    Collection of links reporting ALMA's expected continuum and line sensitivity.

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    Created: Mon Dec 11 13:33:35 EDT 2006 by Antonio Hales
    Modified on Monday, 16-Feb-2009 15:51:11 EST