Overview

Instruments are represented by an Instrument object. When we pass a string to the Simulation (for example instrument='act') just tells it to look up the Instrument object based on that string. We could just as easily do it ourselves as

# The Atacama Cosmology Telescope
act = maria.get_instrument('ACT')

# The Atacama Large Millimeter Array
alma = maria.get_instrument('ALMA')

# MUSTANG-2
m2 = maria.get_instrument('MUSTANG-2')

We can plot the angular/spatial and frequency footprint of an instrument with e.g.

import maria

act = maria.get_instrument('ACT')
act.plot()

(Source code, png, hires.png, pdf)

Customizing instruments

The Instrument is based on a list of arrays (see Arrays), which are in turn based on a list of bands (see Bands). The easiest way to construct an instrument from scratch is as

from maria import Instrument, Band

band1 = {"center": 150, "width": 30, "NET_RJ": 1e-5}
band2 = "act/pa5/f150"

array1 = {"n": 1000,
        "primary_size": 10,
        "field_of_view": 0.5,
        "bands": [band1, band2]}

array2 = "act/pa5"

my_instrument = Instrument(arrays=[array1, array2])