ULSA.spectral_index_fitting.spectral_index_analysis_for_direction_dependence

class:

class ULSA.spectral_index_fitting.spectral_index_frequency_dependent.freq_dependent_index(object):

method:

__init__(self, freq, beta_1, v_1)
Parameters

  • freq (float) – spectral index value in this frequency will be output.

  • beta_1 (float) – beta = beta0 + beta_1*exp(freq/v_1)

  • v_1 (float) – beta = beta0 + beta_1*exp(freq/v_1)

Returns

none

combined_index(downgrade_to)

return the spectral index sky map for spatial-variance spectral index condition.

Parameters

downgrade_to (int) – The Nside value one choose in healpix mode, must be 2^N.

Returns

the spectral index value

Return type

float

Raises

TypeError – if the downgrade_to is not 2^N.