barak.sed.Passband¶

class barak.sed.Passband(filename, ccd=None)[source]¶

This class describes a filter transmission curve. Passband objects are created by loading data from from text files containing wavelength in angstroms in the first column, relative transmission efficiency in the second column (whitespace delimited). For example, to create a Passband object for the 2MASS J filter:

passband = Passband(‘J_2MASS.res’)

where ‘J_2MASS.res’ is a file in the current working directory that describes the filter.

The available passbands are in PASSBANDS.

Attributes

wa	array of floats	Wavelength in Angstroms
tr	array of floats	Normalised transmission, including atmospheric extinction and detector efficiency. May or may not include extinction from the optical path.
effective_wa	float	Effective wavelength of the passband.

Methods

plot([effic, atmos, ymax])

Plots the passband.

__init__(filename, ccd=None)[source]¶

Methods

__init__(filename[, ccd])
plot([effic, atmos, ymax])	Plots the passband.