Publications (20)
EarthFinder Probe Mission Concept Study: Characterizing nearby stellar exoplanet systems with Earth-mass analogs for future direct imaging
Peter Plavchan, Gautam Vasisht, Chas Beichman +52
EarthFinder is a NASA Astrophysics Probe mission concept selected for study as input to the 2020 Astrophysics National Academies Decadal Survey. The EarthFinder concept is based on…
Supernovae and Single-Year Anomalies in the Atmospheric Radiocarbon Record
Michael Dee, Benjamin Pope, Daniel Miles +2
Single-year spikes in radiocarbon production are caused by intense bursts of radiation from space. Supernovae emit both high-energy particle and electromagnetic radiation, but it i…
Planet Formation Imager (PFI): science vision and key requirements
Stefan Kraus, John D. Monnier, Michael J. Ireland +75
The Planet Formation Imager (PFI) project aims to provide a strong scientific vision for ground-based optical astronomy beyond the upcoming generation of Extremely Large Telescopes…
HII 2407: A Low-Mass Eclipsing Binary Revealed by K2 Observations of the Pleiades
Trevor J. David, John Stauffer, Lynne A. Hillenbrand +16
The star HII 2407 is a member of the relatively young Pleiades star cluster and was previously discovered to be a single-lined spectroscopic binary. It is newly identified here wit…
Mitigating effects of telescope jitter through differentiable forward-modeling
Max Charles, Louis Desdoigts, Benjamin Pope +3
Instabilities in telescope pointing, commonly referred to as jitter, introduce image degradation that can compromise the accuracy of critical scientific observables. This work pres…
Image reconstruction with the JWST Interferometer
Max Charles, Louis Desdoigts, Benjamin Pope +7
Flying on board the James Webb Space Telescope (JWST) above Earth's turbulent atmosphere, the Aperture Masking Interferometer (AMI) on the NIRISS instrument is the highest-resoluti…
Quantum-enabled optical large-baseline interferometry: applications, protocols and feasibility
Zixin Huang, Oleg Titov, Mikolaj K. Schmidt +4
Optical Very Long Baseline Interferometry (VLBI) offers the potential for unprecedented angular resolution in both astronomical imaging and precision measurements. Classical approa…
Photometry of Very Bright Stars with Kepler and K2 Smear Data
Benjamin Pope, Timothy White, Daniel Huber +6
High-precision time series photometry with the Kepler satellite has been crucial to our understanding both of exoplanets, and via asteroseismology, of stellar physics. After the fa…
Phase Retrieval and Design with Automatic Differentiation
Alison Wong, Benjamin Pope, Louis Desdoigts +3
The principal limitation in many areas of astronomy, especially for directly imaging exoplanets, arises from instability in the point spread function (PSF) delivered by the telesco…
The Palomar Kernel Phase Experiment: Testing Kernel Phase Interferometry for Ground-based Astronomical Observations
Benjamin Pope, Peter Tuthill, Sasha Hinkley +5
At present, the principal limitation on the resolution and contrast of astronomical imaging instruments comes from aberrations in the optical path, which may be imposed by the Eart…
Wavefront sensing from the image domain with the Oxford-SWIFT integral field spectrograph
Benjamin Pope, Niranjan Thatte, Rick Burruss +3
The limits for adaptive-optics (AO) imaging at high contrast and high resolution are determined by residual phase errors from non-common-path aberrations not sensed by the wavefron…
Differentiable Optics with dLux I: Deep calibration of Flat Field and Phase Retrieval with Automatic Differentiation
Louis Desdoigts, Benjamin Pope, Jordan Dennis +1
The sensitivity limits of space telescopes are imposed by uncalibrated errors in the point spread function, photon-noise, background light, and detector sensitivity. These are typi…
Differentiable Optics with dLux II: Optical Design Maximising Fisher Information
Louis Desdoigts, Benjamin Pope, Michael Gully-Santiago +1
The design of astronomical hardware operating at the diffraction limit requires optimisation of physical optical simulations of the instrument with respect to desired figures of me…
AMIGO: a Data-Driven Calibration of the JWST Interferometer
Louis Desdoigts, Benjamin Pope, Max Charles +8
The James Webb Space Telescope (JWST) hosts a non-redundant Aperture Masking Interferometer (AMI) in its Near Infrared Imager and Slitless Spectrograph (NIRISS) instrument, providi…
Dancing in the Dark: New Brown Dwarf Binaries from Kernel Phase Interferometry
Benjamin Pope, Frantz Martinache, Peter Tuthill
This paper revisits a sample of ultracool dwarfs in the Solar neighborhood previously observed with the Hubble Space Telescope's NICMOS NIC1 instrument. We have applied a novel hig…
The TOLIMAN mission: A low-cost space telescope for high precision narrow-angle astrometry
Peter Tuthill, Christopher Betters, Max Charles +29
The TOLIMAN project is engaged with the construction, launch and operation of a low-cost space telescope of unorthodox optical design. Its primary science goal targets an exhaustiv…
K2SC: Flexible systematics correction and detrending of K2 light curves using Gaussian Process regression
Suzanne Aigrain, Hannu Parviainen, Benjamin Pope
We present K2SC (K2 Systematics Correction), a Python pipeline to model instrumental systematics and astrophysical variability in light curves from the K2 mission. K2SC uses Gaussi…
Solar Energetic Particle Ground-Level Enhancements and the Solar Cycle
Mathew Owens, Luke Barnard, Benjamin Pope +3
Severe geomagnetic storms appear to be ordered by the solar cycle in a number of ways. They occur more frequently close to solar maximum and declining phase, are more common in lar…
A Demonstration of Wavefront Sensing and Mirror Phasing from the Image Domain
Benjamin Pope, Nick Cvetojevic, Anthony Cheetham +3
In astronomy and microscopy, distortions in the wavefront affect the dynamic range of a high contrast imaging system. These aberrations are either imposed by a turbulent medium suc…
Photonic Technologies for a Pupil Remapping Interferometer
Peter Tuthill, Nemanja Jovanovic, Sylvestre Lacour +9
Interest in pupil-remapping interferometry, in which a single telescope pupil is fragmented and recombined using fiber optic technologies, has been growing among a number of groups…