Let's first make sure we have the latest version of PHOEBE 2.3 installed. (You can comment out this line if you don't use pip for your installation or don't want to update to the latest release).
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!pip install -I "phoebe>=2.3,<2.4"
As always, let's do imports and initialize a logger and a new Bundle. See Building a System for more details.
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%matplotlib inline
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import phoebe
from phoebe import u # units
import numpy as np
import matplotlib.pyplot as plt
logger = phoebe.logger()
b = phoebe.default_binary()
NOTE extinction parameters were moved from the dataset to system context in the 2.3 release
Extinction is parameterized by 3 parameters: ebv (E(B-V)), Av, and Rv. Of these three, two can be provided and the other must be constrained. By default, ebv is the constrained parameter. To change this, see the tutorial on constraints and the b.flip_constraint API docs.
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print(b.filter(qualifier='ebv'))
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print(b.get_parameter(qualifier='ebv', context='system'))
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print(b.get_parameter(qualifier='ebv', context='constraint'))
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print(b.get_parameter(qualifier='Av'))
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print(b.get_parameter(qualifier='Rv'))
For more details on the contribution of extinction to observables, see the following example scripts:
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