Calibration of an Analog-to-Digital Conversion Nonlinearity in JWST/NIRISS

arXiv:2606.11983 · astro-ph.IM, astro-ph.EP · Submitted 2026-06-10 · Read on arXiv

Shashank Dholakia, Shishir Dholakia, Benjamin J. S. Pope, Louis Desdoigts, Shrishmoy Ray, Peter G. Tuthill, Anand Sivaramakrishnan

astro-ph.IM, astro-ph.EP

Submitted: 2026-06-10

Comments: Submitted to PASP; 12 pages, 5 figures. Correction script at https://github.com/shashankdholakia/niriss-cal-inl

Code: https://github.com/shashankdholakia/niriss-cal-inl

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Calibration — 13× in this paper · explained in 7 episodes
• Trace — 9× in this paper · explained in 2 episodes
• Transmission spectroscopy — 6× in this paper · explained in 2 episodes
• Aperture — 4× in this paper · explained in 1 episode
• Single Object Slitless Spectroscopy — 3× in this paper
• Early Release Science — 2× in this paper
• Accuracy — 1× in this paper · explained in 1 episode
• Benchmark — 1× in this paper · explained in 2 episodes
• Society of Photo-Optical Instrumentation Engineers — 1× in this paper
• Wide Field Slitless Spectroscopy — 1× in this paper

Sources

• The Wide Field Infrared Survey Telescope: 100 Hubbles for the 2020s
• Characterization of the visit-to-visit Stability of the GR700XD Spectral Traces for NIRISS/SOSS Observations
• Efficient and Modular Implicit Differentiation
• Differentiable Optics with dLux II: Optical Design Maximising Fisher Information
• AMIGO: a Data-Driven Calibration of the JWST Interferometer
• The No-U-Turn Sampler: Adaptively Setting Path Lengths in Hamiltonian Monte Carlo
• ExoIris: fast exoplanet transmission spectroscopy in Python
• Composable Effects for Flexible and Accelerated Probabilistic Programming in NumPyro
• The Lazuli Space Observatory: Architecture & Capabilities
• Precise Constraints on the Energy Budget of WASP-121 b from its JWST NIRISS/SOSS Phase Curve
• JWST COMPASS: NIRSpec/G395H Transmission Observations of the Sub-Neptune HD 15337 c

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