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davidwhogg / LensTractor

finding strong gravitationally lensed quasars in ground-based data
GNU General Public License v2.0
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Point Sources are not variable #12

Open drphilmarshall opened 11 years ago

drphilmarshall commented 11 years ago

There are now two use cases requiring variable point sources - Lens, and Nebula-SN. Point source behind Lens could be either AGN or SN. Lensed images need to be independently variable, due to time delay (at this early/detection stage) and microlensing. SN case needs Tractor class VariablePointSource inherited by Supernova. Lens case needs variable image magnifications to enable 4 independent images. Let's punt the extraction of time delays for now (or more accurately, then next few years).

drphilmarshall commented 10 years ago

Hey @davidwhogg - can we attempt to code up variable point sources in the Tractor on Wednesday please? I think I want the Nebula models to have variable point sources, to fit the multi-epoch data, while the Lens model needs to have a constant point source and then variable magnifications at image positions. @dstndstn maybe you can suggest the right way towards a VariablePointSource tractor class? All advice gratefully received as always.

davidwhogg commented 10 years ago

yes and yes!