skymapwrappers¶

skymapwrappers.modelwrapper¶

Module Description¶

This module contains three classes: GMOSS, ULSA, and SSM.

GMOSS - Generates the Galactic and extragalactic sky brightness temperature at frequencies ranging from 30 MHz to 80 MHz based on a table of precomputed values.

ULSA - Generates the ultra-large scale structure (ULSS) component of the sky brightness temperature at frequencies ranging from 30 MHz to 80 MHz based on a table of precomputed values.

SSM - Generates the sky temperature due to the Sunyaev-Zeldovich effect at a specified frequency and HEALPix resolution.

Dependencies: pandas, numpy, healpy, os, and functions from the common.py module.

Usage: Instantiate a class and call its “generate” method with a frequency in MHz as an argument. The “generate” method will return an array of brightness temperature values.

Note: These classes assume that the user has the necessary data files and functions installed on their system.

class GMOSS[source]¶

Bases: object

A class to generate the Galactic diffuse emission map from GMRT observations between 30-80 MHz based on the tabulated data.

Attributes¶

gmoss_map_DFpandas.DataFrame: Dataframe containing the GMRT observed spectra for Galactic diffuse emission between 30-80 MHz.

generate(frequency_MHz)[source]¶

Generates the Galactic diffuse emission map for the given frequency.

Parameters¶

frequency_MHzfloat: The frequency value in MHz for which the Galactic diffuse emission map needs to be generated.

Returns¶

numpy.ndarray: The generated Galactic diffuse emission map for the given frequency.

GlobalSkyModel¶: alias of AddCMB

HaslamSkyModel¶: alias of AddCMB

class SSM[source]¶

Bases: object

A class to generate the simulated sky maps from the Global Sky Model (GSM) based on the specified frequency and nside.

generate(frequency_MHz, nside=64)[source]¶

Parameters¶

frequency_MHzfloat: The frequency value in MHz for which the simulated sky map needs to be generated.
nsideint, optional: The value of nside to use for the generation of simulated sky map. The default value is 64.

Returns¶

numpy.ndarray: The generated simulated sky map from the Global Sky Model (GSM) for the given frequency and nside.

class ULSA(index_type: str = 'freq_dependent_index')[source]¶

Bases: object

A class to generate the UTR-2 Low-Frequency Sky Atlas maps from the tabulated data based on the specified index type.

Attributes¶

ulsa_map_DFpandas.DataFrame: Dataframe containing the UTR-2 Low-Frequency Sky Atlas maps between 30-80 MHz.

generate(frequency_MHz)[source]¶

Parameters¶

frequency_MHzfloat: The frequency value in MHz for which the UTR-2 Low-Frequency Sky Atlas map needs to be generated.

Returns¶

numpy.ndarray: The generated UTR-2 Low-Frequency Sky Atlas map for the given frequency.

add_CMB_decorator(cls)[source]¶

Decorator function to add the Cosmic Microwave Background (CMB) temperature to the output of a class.

Parameters¶

clsclass: The original class to be decorated.

Returns¶

class: The decorated class that adds the CMB temperature to the output.

Notes¶

The CMB temperature (2.7255 K) is added to the output generated by the decorated class.

Example¶

@add_CMB_decorator OriginalClass

# Decorate the class ModifiedClass = add_CMB_decorator(OriginalClass)

# Create an instance of the modified class modified = ModifiedClass()

# Generate the output with added CMB temperature result = modified.generate(freq)