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== NIKA2 Bandpasses == <<TableOfContents(5)>>
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=== Information for Observers === == Information for Observers on NIKA2 Bandpasses ==
=== Bandpasses of the NIKA2 Arrays ===
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NIKA2 bandpasses of the 3 arrays are described in Section 2.5 and Figure 1 of [[https://ui.adsabs.harvard.edu/abs/2020A%26A...637A..71P/abstract|Perotto et al. (2020)]]. For convenience, we provide here a fits file [[attachment:Transmission_2017_Jan_NIKA2_v1.fits]] (priv. com. Juan-Macias Perez 12-Jun-2020). The 2mm bandpass is valid since September 2016 (Run N2R5). The following figure shows a resulting plot: For convenience, we provide here the three bandpasses: [[attachment:nika2-2mm-band.dat]], [[attachment:nika2-1mm-band-1.dat]], [[attachment:nika2-1mm-band-2.dat]]. These bandpasses have already been corrected for the Rayleigh-Jeans source emission. They are shown in the figure below and also in Figure 1 of [[https://ui.adsabs.harvard.edu/abs/2020A%26A...637A..71P/abstract|Perotto et al. (2020)]]. These bandpasses were measured in the laboratory in Grenoble.
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{{attachment:nika2_bands.png}} === Atmospheric transmission curves ===
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The ATM model of J.Pardo & P.Cernicharo was used to calculate the atmospheric transmission at Pico Veleta for three different amounts of precipitable water vapour: 2, 4, 7mm: [[attachment:atmos2mm.dat]], [[attachment:atmos4mm.dat]], [[attachment:atmos7mm.dat]]. See also the figure below.
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=== Bandpasses of 2015 === === Figures ===

{{attachment:nika2-bandpasses3.png||height=550}}
{{attachment:atmos-transmission9.png||height=550}}

=== Old information ===

Back to the NIKA2 main page

Information for Observers on NIKA2 Bandpasses

Bandpasses of the NIKA2 Arrays

For convenience, we provide here the three bandpasses: nika2-2mm-band.dat, nika2-1mm-band-1.dat, nika2-1mm-band-2.dat. These bandpasses have already been corrected for the Rayleigh-Jeans source emission. They are shown in the figure below and also in Figure 1 of Perotto et al. (2020). These bandpasses were measured in the laboratory in Grenoble.

Atmospheric transmission curves

The ATM model of J.Pardo & P.Cernicharo was used to calculate the atmospheric transmission at Pico Veleta for three different amounts of precipitable water vapour: 2, 4, 7mm: atmos2mm.dat, atmos4mm.dat, atmos7mm.dat. See also the figure below.

Figures

nika2-bandpasses3.png atmos-transmission9.png

Old information

The spectral bands as measured in Néel (note that the two 1.15mm arrays are pretty similar but there is a detectable difference):

xavier_v1.jpg

xavier_v2.jpg

Spectral bands (last edited 2020-06-15 12:16:37 by CarstenKramer)