synthesizer.survey

Survey functionality

Classes

class synthesizer.survey.Instrument(resolution, filters, psfs=None, depths=None, aperture=None, snrs=None, noises=None, resolving_power=None, lam=None)

This class describes an instrument used to make a set of observations.

get_lam_from_R()

Calculates the wavelengths of a spectrum based on this observations resolving power.

class synthesizer.survey.Survey(galaxies=(), fov=None, super_resolution_factor=None, cosmo=FlatLambdaCDM(name='Planck18', H0=<Quantity 67.66 km / (Mpc s)>, Om0=0.30966, Tcmb0=<Quantity 2.7255 K>, Neff=3.046, m_nu=<Quantity [0., 0., 0.06] eV>, Ob0=0.04897))

A Survey helper object which defines all the properties of a survey. This enables the defintion of a survey approach and then the production of photometry and/or images based on that instruments/filters making up the survey. This can handle PSFs and depths which vary across bands and instruments.

add_galaxies(galaxies)

Adds galaxies to this survey :type galaxies: :param galaxies: The galaxies to include in this Survey. :type galaxies: list

add_photometric_instrument(filters, label, resolution=None, psfs=None, depths=None, apertures=None, snrs=None, noises=None)

Adds an instrument and all it’s filters to the Survey.

Raises:

InconsistentArguments – If the arguments do not constitute a valid combination for an instrument an error is thrown.

convert_mag_depth_to_fnu()

Converts depths defined in apparent magnitude to the units of flux (nJy).

convert_mag_depth_to_fnu0(redshift)

Converts depths defined in absolute magnitude to the units of luminosity (erg / s /Hz). This is a helpful wrapper to handle the use of different terminology in the SED object. :type redshift: :param redshift: The redshift of the observation. :type redshift: float

convert_mag_depth_to_lnu(redshift)

Converts depths defined in apparent magnitude to the units of luminosity (erg / s /Hz). :type redshift: :param redshift: The redshift of the observation. :type redshift: float

get_particle_spectra(grid, spectra_type, redshift=None, igm=None, rest_frame=True)

Compute the integrated stellar spectra of each galaxy.

get_photometry(spectra_type, redshift=None, igm=None)

get_spectra(grid, spectra_type, redshift=None, igm=None, rest_frame=True)

Compute the integrated stellar spectra of each galaxy.

Args:

• grid (obj): synthesizer grid object

• redshift (float): array of galaxy redshifts. If None (default),

  all galaxies assumed to be in the rest frame

• igm (obj): synthesizer IGM object, defaults to Inoue+14

Returns:

: None

make_field_ifu(centre)

make_field_image(centre)

make_ifus()

make_images(img_type, spectra_type, kernel_func=None, rest_frame=False, cosmo=None)