ExoPix

Welcome! ExoPix is a collection of tutorials aimed at illustrating the imaging of exoplanets with the James Webb Space Telescope (JWST). Our tutorials are meant to demonstrate the application of the PSF-subtraction algorithm pyKLIP to simulated JWST data. We provide simple walkthroughs of pyKLIP’s ability to reveal exoplanets and measure their properties in imaged extrasolar systems.

We recommend starting with our NIRCAM_F300M_Basic_KLIP_Subtraction, which takes you through the process of modeling and subtracting excess starlight from an image in order to uncover two fake underyling planets. To get a quantitative estimate of how well JWST will do imaging exoplanets, take a look at our NIRCAM_F300M_ContrastCurves tutorial, which uses pyKLIP’s algorithms to inject fake planets into simulated data, and estimate how well we’ll be able to recover them at various separations from the host star. Finally, you can use the NIRCAM_F300M_BKA_Outer_Planet tutorial to see how we’d use our knowledge of a planet’s existence in our data to estimate its flux and position relative to the host star.

Tutorials

Contents:

• Basic KLIP Subtraction Tutorial for JWST Simualted Data
  • Read in the data
  • Read in the Data into pyKLIP
  • Run KLIP-ADI
  • pyKLIP RDI Reduction
  • Now run pyKLIP ADI+RDI
• Creating Contrast Curves with Simulated James Webb Data!
  • The Raw Contrast Curve
  • Now let’s define all the important variables we’d like to use throughout this notebook
  • Calibrating Throughput
  • The Throughput Corrected Contrast Curve
  • Inject Many More Planets
• Perform Astrometry and Photometry on Outer Planet Companion
  • First, we must read in the data
  • Create the Generic Dataset
  • Center on the unocculted PSF
  • KLIP-FM for forward modelling of outer source
  • Load in the forward model and the data and create the fitting object.
  • Set up the Gaussian process kernel, initialize priors, run MCMC
  • Plot the fits
  • Plot the comparison between the data and the best fit model
  • Plot the posterior plots for the parameters
  • Finally, we can read off the planet’s location and flux

Indices and tables

• Index
• Module Index
• Search Page