Rescuing JWST's interferometer with end-to-end differentiable forwards models (Conference Presentation)

Abstract

Non-linear detector effects severely limit JWST’s interferometric performance, compromising the stability required for AMI calibration. AMIGO offers a different solution: a fully differentiable forward model spanning the astrophysical source, optical propagation, and non-linear detector charge migration. By predicting unprocessed detector frames directly, AMIGO avoids the precision limits imposed by the JWST reduction pipeline and incorporates detector physics within the inference process itself. Recent calibration observations have further refined the model, leading to improved visibility precision and stronger detections inside the diffraction limit. This talk will present AMIGO’s current capabilities, detections, and discuss its broader implications for next-generation precision astronomy.

Authors 11

1. Louis C. Desdoigts Aachen Leiden Univ. (Netherlands)

   Leiden University

   Affiliation as printed

   Leiden Univ. (Netherlands)

2. Benjamin J. Pope

   Macquarie University

   Affiliation as printed

   Macquarie Univ. (Australia)

3. Max Charles

   The University of Sydney

   Affiliation as printed

   The Univ. of Sydney (Australia)

4. Peter Tuthill

   The University of Sydney

   Affiliation as printed

   The Univ. of Sydney (Australia)

5. Dory Blakely

   University of Victoria

   Affiliation as printed

   Univ. of Victoria (Canada)

6. Doug Johnstone

   Herzberg Institute of Astrophysics · University of Victoria

   Affiliation as printed

   NRC-Herzberg Astronomy & Astrophysics (Canada)

   Univ. of Victoria (Canada)

7. Shrishmoy Ray

   Macquarie University

   Affiliation as printed

   Macquarie Univ. (Australia)

8. Anand Sivaramakrishnan

   Space Telescope Science Institute

   Affiliation as printed

   Space Telescope Science Institute (United States)

9. Jens Kammerer

   European Southern Observatory

   Affiliation as printed

   European Southern Observatory (Germany)

10. Deepashri Thatte

    Space Telescope Science Institute

    Affiliation as printed

    Space Telescope Science Institute (United States)

11. Kevin Volk

    Space Telescope Science Institute

    Affiliation as printed

    Space Telescope Science Institute (United States)