rail.interactive.creation.engines.dsps_photometry_creator module

rail.interactive.creation.engines.dsps_photometry_creator.dsps_photometry_creator(**kwargs)

Derived class of Creator that generate synthetic absolute and apparent magnitudes from one or more SED models generated with the DSPSSingleSedModeler or DSPSPopulationSedModeler classes. It accepts as input Hdf5Handles containing the rest-frame SEDs in units of Lsun/Hz and outputs an Hdf5Handle containing sequential indices, absolute and apparent magnitudes for each galaxy. Photometric quantities are computed for the filters defined in the configuration file.

jax serially execute the computations on CPU on single core, for CPU parallelization you need MPI. If GPU is used, jax natively and automatically parallelize the execution.

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Creates observed and absolute magnitudes for the population of galaxy rest-frame SEDs and stores them into an Hdf5Handle.

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This function was generated from the function rail.creation.engines.dsps_photometry_creator.DSPSPhotometryCreator.sample

Parameters:

  • model (str, required) – Filepath to the hdf5 table containing the galaxy rest-frame SEDs.

  • seed (int, optional) – The random seed to control sampling

  • Om0 (float, optional) – Omega matter: density of non-relativistic matter in units of the critical density at z=0.

  • w0 (float, optional) – Dark energy equation of state at z=0 (a=1). This is pressure/density for dark energy in units where c=1.

  • wa (float, optional) – Negative derivative of the dark energy equation of state with respect to the scale factor. A cosmological constant has w0=-1.0 and wa=0.0.

  • h (float, optional) – dimensionless Hubble constant at z=0.

  • redshift_key (str, optional) – The keyword of the redshift group in the hdf5 dataset. Default: redshifts

  • restframe_sed_key (str, optional) – Rest-frame SED keyword name of the hdf5 dataset containing rest-frame SEDs Default: restframe_seds

  • absolute_mags_key (str, optional) – Absolute magnitudes keyword name of the output hdf5 dataset Default: rest_frame_absolute_mags

  • apparent_mags_key (str, optional) – Apparent magnitudes keyword name of the output hdf5 dataset Default: apparent_mags

  • filter_folder (str, optional) – Folder containing filter transmissions Default: rail/examples_data/creation_data/data/dsps_default_data/filters

  • instrument_name (str, optional) – Instrument name as prefix to filter transmission files Default: lsst

  • wavebands (list, optional) – List of wavebands Default: [‘u’, ‘g’, ‘r’, ‘i’, ‘z’, ‘y’]

  • min_wavelength (float, optional) – The minimum rest-frame wavelength. Default: 250

  • max_wavelength (float, optional) – The maximum rest-frame wavelength Default: 12000

  • ssp_templates_file (str, optional) – hdf5 file storing the SSP libraries used to create SEDs Default: rail/examples_data/creation_data/data/dsps_default_data/ssp_data_fsps_v 3.2_lgmet_age.h5

  • default_cosmology (bool, optional) – True to use default DSPS cosmology. If False,Om0, w0, wa, h need to be supplied in the sample function Default: True

Returns:

Hdf5Handle storing the absolute and apparent magnitudes.

Return type:

dict

Notes

This method puts seed into the stage configuration data, which makes them available to other methods. It then calls the run method. Finally, the Hdf5Handle associated to the output tag is returned.