ESBO-ETC/esbo_etc/classes/target/FileTarget.py

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2020-04-08 13:38:08 +02:00
from ..target.ATarget import ATarget
from ..SpectralQty import SpectralQty
import astropy.units as u
from astropy.io import ascii
import re
class FileTarget(ATarget):
"""
A class to create a target from a file containing the spectral flux densities
"""
def __init__(self, file: str):
"""
Initialize a new target from a file containing the spectral flux density values
Parameters
----------
file : str
The file to read the spectral flux density values from. The file needs to provide two columns: wavelength
and the corresponding spectral flux density. The format of the file will be guessed by
`astropy.io.ascii.read(). If the file doesn't provide units via astropy's enhanced CSV format, the units will
be read from the column headers or otherwise assumed to be *nm* and *W / m^2 / nm*.
"""
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# Create spectral quantity from file
sfd = SpectralQty.fromFile(file, u.nm, u.W / (u.m ** 2 * u.nm))
# Initialize the super class
super().__init__(sfd)