35 citations · 118 across the 18 of their papers we have counts for
21 papers
Optimal Photon Counting with Fast, Low Noise Astronomical Imagers
Jack T. Dinsmore, Christopher Layden, Roger W. Romani +9
Measuring rapid astrophysical phenomena requires many short exposures, which suffer from repeated read noise. A variety of recent technologies are achieving sub-electron read noise…
A Statistical Mechanics Model for Stable Rings Outside the Roche Limit
Jack T. Dinsmore
Stellar occultations have revealed two rings around the dwarf planet Quaoar outside the Roche limit. Simulations suggest that the rings are sustained by large velocity dispersions.…
The Lightspeed project: high-speed, ultra-low read noise imaging and polarimetry for the Magellan telescopes
Christopher Layden, Kevin Burdge, John J. Piotrowski +12
Lightspeed will be an ultra-fast (> kHz), ultra-low read noise, multicolor (ugriz + IR) imager for the 6.5 meter Magellan Clay telescope. In a single-channel configuration, Lightsp…
Kes 75 with IXPE: Detection of Nebular X-ray Polarization and Change in Pulsar Lightcurve
Josephine Wong, Jack T. Dinsmore, Roger W. Romani +16
We present the first X-ray polarization measurements of the PSR/PWN complex within SNR Kes 75. Two IXPE observations were conducted in October/November 2024 a…
IXPE Polarizations of the Lighthouse Pulsar, Trail, and Filament
Jack T. Dinsmore, Roger W. Romani, S. Zhang +9
The Lighthouse pulsar (PSR J11016101) sports a bright X-ray trail and filament. The synchrotron emission from both structures is expected to be polarized, with electric vector p…
A Physical Model of Pulsar X-ray Filaments
Jack T. Dinsmore, Roger W. Romani
We present a model for pulsar filaments - a class of narrow X-ray nebulae misaligned with the proper motion, powered by pulsar-generated . We suggest that cosmic ray-enhance…
Chandra Proper Motions and Milliarcsecond Astrometry of Nineteen Pulsars
Jack T. Dinsmore, Roger W. Romani
We present X-ray proper motion (PM) measurements of 19 pulsars using new and archival data from the Chandra X-ray Observatory, including pulsar wind trails and X-ray filaments. Pre…
An eclipsing 8.56 minute orbital period mass-transferring binary
Emma T. Chickles, Joheen Chakraborty, Kevin B. Burdge +34
We report the discovery of ATLAS J101342.5-451656.8 (hereafter ATLAS J1013-4516), an 8.56 minute orbital period mass transferring AM Canum Venaticorum binary with mean Gaia magnitu…
X-ray Polarization of the Intrabinary Shock in Redback Pulsar J17232837
Andrew G. Sullivan, Jack T. Dinsmore, Roger W. Romani
The intrabinary shocks (IBS) in spider pulsars emit non-thermal synchrotron X-rays from accelerated electrons and positrons in the shocked pulsar wind, likely energized by magnetic…
proto-Lightspeed: a high-speed, ultra-low read noise imager on the Magellan Clay Telescope
Christopher Layden, Kevin Burdge, Gabor Furesz +9
proto-Lightspeed is a new instrument that has been commissioned on the Nasmyth East port of the Magellan Clay Telescope at Las Campanas Observatory to deliver high-speed optical im…
Advanced Weights for IXPE Polarization Analysis
Jack T. Dinsmore, Roger W. Romani
As the Imaging X-ray Polarimetry Explorer (IXPE) measures increasingly faint sources, the need for precise polarimetry extraction becomes paramount. In addition to previously descr…
X-ray Polarization Detection of the Pulsar Wind Nebula in G21.5-0.9 with IXPE
Niccolò Di Lalla, Nicola Omodei, Niccolò Bucciantini +98
We present the X-ray polarization observation of G21.5-0.9, a young Galactic supernova remnant (SNR), conducted with the Imaging X-ray Polarimetry Explorer (IXPE) in October 2023,…
The Guitar's Magnetic Field Revealed by Starlight Polarization
Jack T. Dinsmore, Roger W. Romani
The Guitar nebula surrounding PSR B2224+65 boasts a pulsar X-ray filament likely aligned with the local magnetic field. We present new RoboPol stellar polarization data distributed…
A Catalog of Pulsar X-ray Filaments
Jack T. Dinsmore, Roger W. Romani
We present the first Chandra X-ray Observatory (CXO) catalog of "pulsar X-ray filaments," or "misaligned outflows." These are linear, synchrotron radiating features powered by ultr…
Polarization Leakage and the IXPE PSF
Jack T. Dinsmore, Roger W. Romani
By measuring photoelectron tracks, the gas pixel detectors of the Imaging X-ray Polarimetry Explorer satellite provide estimates of the photon detection location and its electric v…
Catalog of Integrated-Light Star Cluster Light Curves in TESS
Tobin M. Wainer, Gail Zasowski, Joshua Pepper +10
We present the first integrated light, TESS-based light curves for star clusters in the Milky Way, Small Magellanic Cloud, and Large Magellanic Cloud. We explore the information en…
Improved Measurements of the IXPE Crab Polarization
Josephine Wong, Roger W. Romani, Jack T. Dinsmore
X-ray polarization from the Imaging X-ray Polarimetry Explorer (IXPE) provides an important new probe of the geometry of the pulsar emission zone and of particle acceleration in th…
Constraining the Interiors of Asteroids Through Close Encounters
Jack T Dinsmore, Julien de Wit
Knowledge of the interior density distribution of an asteroid can reveal its composition and constrain its evolutionary history. However, most asteroid observational techniques are…
Luminosity functions consistent with a pulsar-dominated Galactic Center Excess
Jack T. Dinsmore, Tracy R. Slatyer
A new population of millisecond pulsars is a long-standing proposed explanation for the excess of GeV-scale gamma rays emanating from the region surrounding the center of the Milky…
GPU coprocessors as a service for deep learning inference in high energy physics
Jeffrey Krupa, Kelvin Lin, Maria Acosta Flechas +13
In the next decade, the demands for computing in large scientific experiments are expected to grow tremendously. During the same time period, CPU performance increases will be limi…
Schottky Anomaly of deSitter Black Holes
Jack Dinsmore, Patrick Draper, David Kastor +2
The interplay of black hole and cosmological horizons introduces distinctive thermodynamic behavior for deSitter black holes, including well-known upper bounds for the mass and ent…