Investigate moving dependency from extinction to dust_extinction

[benjaminrose]

Do we want to moe to dust_extiction?

[benjaminrose]

Ping, @jchiang87

[benjaminrose]

Initially, dust_extinction has the required A_V dependent dust laws. We might want to do some clever import dust_extinction as ... to make the transition easier. Though this might not work since the APIs are very different for extinction and dust_extinction.

However, I am not sure what extinction.apply is, and I don't see this in dust_extinction.

sncosmo/sncosmo/models.py

Line 1997 in c165134

return extinction.apply(extinction.ccm89(wave, ebv * r_v, r_v), flux)

It will take a bit more effort to track down what this bit of code is doing and see what needs to be done to move to dust_extinction.