Data Module

Data Loading and Management Module

This module provides data classes and functions to download and manage data files for the COBI package.

The module handles loading of: - Binary masks (SAT, LAT, CO, GAL, PS) - Bandpass profiles - CAMB initialization files - Pre-computed power spectra - Time-dependent isotropic spectra

All data files are automatically downloaded from the GitHub release repository if not present locally.

Classes

Data

Main data class that handles file downloading, caching, and loading for various file formats (FITS, pickle, INI).

Data Objects

SAT_MASKData

Binary mask for SAT observations

LAT_MASKData

Binary mask for LAT observations

CO_MASKData

Binary mask for CO emission regions

GAL_MASKData

Binary mask for Galactic plane (parameterized by galcut)

PS_MASKData

Binary mask for polarized point sources

BP_PROFILEData

Bandpass profile data

CAMB_INIData

CAMB initialization file for CMB spectrum calculation

SPECTRAData

Pre-computed CMB power spectra

ISO_TD_SPECTRAData

Time-dependent isotropic birefringence spectra

Example

from cobi.data import LAT_MASK

# Set directory where data will be cached LAT_MASK.directory = ‘/path/to/cache’

# Load the mask (downloads if not present) mask = LAT_MASK.data

class Data(filename: str, _directory: str | None = None, _galcut: int | None = 0)

Bases: object

Parameters:

• filename (str)

• _directory (str | None)

• _galcut (int | None)

filename: str

property directory: str | None

property galcut: int | None

property fname: str

property url: str

property data: Any

__init__(filename, _directory=None, _galcut=0)

Parameters:

• filename (str)

• _directory (str | None)

• _galcut (int | None)

Return type:

None

Data Class

class Data(filename: str, _directory: str | None = None, _galcut: int | None = 0)

Parameters:

• filename (str)

• _directory (str | None)

• _galcut (int | None)

filename: str

property directory: str | None

property galcut: int | None

property fname: str

property url: str

property data: Any

__init__(filename, _directory=None, _galcut=0)

Parameters:

• filename (str)

• _directory (str | None)

• _galcut (int | None)

Return type:

None

Pre-defined Data Objects

SAT_MASK

Optional[str] = None, _galcut: Optional[int] = 0)

Type:

Data(filename

Type:

str, _directory

LAT_MASK

Optional[str] = None, _galcut: Optional[int] = 0)

Type:

Data(filename

Type:

str, _directory

CO_MASK

Optional[str] = None, _galcut: Optional[int] = 0)

Type:

Data(filename

Type:

str, _directory

GAL_MASK

Optional[str] = None, _galcut: Optional[int] = 0)

Type:

Data(filename

Type:

str, _directory

PS_MASK

Optional[str] = None, _galcut: Optional[int] = 0)

Type:

Data(filename

Type:

str, _directory

BP_PROFILE

Optional[str] = None, _galcut: Optional[int] = 0)

Type:

Data(filename

Type:

str, _directory

CAMB_INI

Optional[str] = None, _galcut: Optional[int] = 0)

Type:

Data(filename

Type:

str, _directory

SPECTRA

Optional[str] = None, _galcut: Optional[int] = 0)

Type:

Data(filename

Type:

str, _directory

ISO_TD_SPECTRA

Optional[str] = None, _galcut: Optional[int] = 0)

Type:

Data(filename

Type:

str, _directory