All future seminars

Number of entries: 1

18
June 2021

Simulating Astronomical Images One Photon at Time


Start: 12:00h
Speaker: John Peterson (Purdue University)
Place: On-line seminar

We describe a novel tool to simulate astronomical images one photon at a time called the Photon Simulator (PhoSim). PhoSim uses a photon Monte Carlo method using ab initio physics to generate realistic images in the optical/IR waveband. PhoSim starts by sampling spatial-spectral representations of stars…
Start: 12:00h
Speaker: John Peterson (Purdue University)
Place: On-line seminar

We describe a novel tool to simulate astronomical images one photon at a time called the Photon Simulator (PhoSim). PhoSim uses a photon Monte Carlo method using ab initio physics to generate realistic images in the optical/IR waveband. PhoSim starts by sampling spatial-spectral representations of stars and galaxies. PhoSim then propagates those photons through the atmosphere (for ground-based telescopes) and the telescope optics, and ultimately converts the photons into an electron in the sensors which is used to construct the image. PhoSim uses hydrodynamics to represent the atmosphere, advanced raytracing and elasticity theory to describe the optics, and detailed electrostatic solutions to represent the sensor. We highlight a number of applications and show its use on a variety of space-based and ground-based telescopes. PhoSim is surprisingly fast due to the efficient nature of the Monte Carlo approach, advanced numerical algorithms, and the use of multi-threading. PhoSim is publicly available and is continually improved.
Institute of Space Sciences (IEEC-CSIC)

Campus UAB, Carrer de Can Magrans, s/n
08193 Barcelona.
Phone: +34 93 737 9788
Email: ice@ice.csic.es
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An institute of the Consejo Superior de Investigaciones Científicas

An institute of the Consejo Superior de Investigaciones Científicas
Affiliated with the Institut d'Estudis Espacials de Catalunya

Affiliated with the Institut d'Estudis Espacials de Catalunya