Clio Sleator
A5053982564- Particle Detector Development and Performance
- Gamma-ray bursts and supernovae
- Radiation Detection and Scintillator Technologies
- Astrophysics and Cosmic Phenomena
- Nuclear Physics and Applications
- Medical Imaging Techniques and Applications
- Astrophysical Phenomena and Observations
- Radiation Therapy and Dosimetry
- Advanced X-ray and CT Imaging
- Dark Matter and Cosmic Phenomena
- Astro and Planetary Science
- Advanced Semiconductor Detectors and Materials
- Astronomy and Astrophysical Research
- Atomic and Subatomic Physics Research
- Computational Physics and Python Applications
- Planetary Science and Exploration
- Radioactive Decay and Measurement Techniques
- Advanced X-ray Imaging Techniques
- Pulsars and Gravitational Waves Research
- Astronomical Observations and Instrumentation
- Distributed and Parallel Computing Systems
- Superconducting and THz Device Technology
- Evolutionary Psychology and Human Behavior
- Scientific Measurement and Uncertainty Evaluation
- Radio Astronomy Observations and Technology
United States Naval Research Laboratory
2020-2024
Technology Service Corporation (United States)
2023
K Lab (United States)
2022
Louisiana State University
2022
University of California, Berkeley
2016-2020
Lawrence Berkeley National Laboratory
2017
National Tsing Hua University
2017
Institute of Physics, Academia Sinica
2017
Institut de Recherche en Astrophysique et Planétologie
2017
Space Science Institute
2015
The All-sky Medium Energy Gamma-ray Observatory eXplorer (AMEGO-X) is designed to identify and characterize gamma rays from extreme explosions accelerators. main science themes include: supermassive black holes their connections neutrinos cosmic rays; binary neutron star mergers the relativistic jets they produce; ray particle acceleration sources including Galactic supernovae; continuous monitoring of other astrophysical events over full sky in this important energy range. AMEGO-X will...
The Compton Spectrometer and Imager (COSI) is a NASA Small Explorer (SMEX) satellite mission in development with planned launch 2027. COSI wide-field gamma-ray telescope designed to survey the entire sky at 0.2-5 MeV. It provides imaging, spectroscopy, polarimetry of astrophysical sources, its germanium detectors provide excellent energy resolution for emission line measurements. Science goals include studies 0.511 MeV from antimatter annihilation Galaxy, mapping radioactive elements...
Abstract The Compton Spectrometer and Imager balloon payload (COSI-Balloon) is a wide field-of-view gamma-ray telescope that operates in the 0.2–5 MeV bandpass. COSI-Balloon had successful 46 day flight 2016 during which instrument observed Crab Nebula, Cygnus X-1, Centaurus A. Using data collected by this flight, we present source flux extraction of signals from variable background environment produce images these background-dominated sources performing Richardson–Lucy deconvolutions. We...
A long duration gamma-ray burst, GRB 160530A, was detected by the Compton Spectrometer and Imager (COSI) during 2016 COSI Super Pressure Balloon campaign. As a telescope, is inherently sensitive to polarization of sources in energy range 0.2-5.0 MeV. We measured 160530A using 1) standard method (SM) based on fitting distribution azimuthal scattering angles with modulation curve, 2) an unbinned, maximum likelihood (MLM). In both cases, level below $99\%$ confidence minimum detectable levels...
Abstract The signature of positron annihilation, namely the 511 keV γ -ray line, was first detected coming from direction Galactic center in 1970s, but source positrons still remains a puzzle. measured flux annihilation corresponds to an intense steady production, with rate on order ∼10 43 <?CDATA ${\text{}}{e}^{+}\,{{\rm{s}}}^{-1}$?> . emission is strongest persistent line signal, and it shows concentration toward region. An additional low-surface brightness component aligned disk; however,...
The Compton Spectrometer and Imager (COSI) is a balloon-borne, soft-gamma ray imager, spectrometer, polarimeter with sensitivity from 0.2 to 5 MeV. Utilizing compact telescope design twelve cross-strip, high-purity germanium detectors, COSI has three main science goals: study the 511 keV positron annihilation line Galactic plane, image diffuse emission stellar nuclear lines, perform polarization studies of gamma-ray bursts other extreme astrophysical environments. just completed successful...
We give an overview of the science objectives and mission design Spectroscopic Time-Resolving Observatory for Broadband Energy X-rays (STROBE-X) observatory, which has been proposed as a NASA probe-class (~$1.5B) in response to Astro2020 recommendation X-ray probe.
The balloon-borne Compton Spectrometer and Imager (COSI) had a successful 46-day flight in 2016. instrument is sensitive to photons the energy range $0.2$-$5$ MeV. telescopes have advantage of unique imaging response provide possibility strong background suppression. With its high-purity germanium detectors, COSI can precisely map $\gamma$-ray line emission. strongest persistent diffuse signal 511 keV emission from annihilation electrons with positrons direction Galactic centre. While many...
The Compton Spectrometer and Imager (COSI) is a NASA Small Explorer (SMEX) satellite mission in development with planned launch 2027. COSI wide-field gamma-ray telescope designed to survey the entire sky at 0.2-5 MeV. It provides imaging, spectroscopy, polarimetry of astrophysical sources, its germanium detectors provide excellent energy resolution for emission line measurements. Science goals include studies 0.511 MeV from antimatter annihilation Galaxy, mapping radioactive elements...
The Spectroscopic Time-Resolving Observatory for Broadband X-rays (STROBE-X) is a proposed NASA Astrophysics Probe-class mission. STROBE-X time domain and multi-messenger mission designed to provide an unparalleled laboratory probing strong gravity the behavior of matter in extreme environments. instrument suite encompasses wide-field monitor two pointed instruments transient discovery capability rapid follow-up with broadband (0.2–30 keV), high resolution spectroscopy. Over 10,000...
The High Energy Modular Array (HEMA) is one of three instruments that compose the STROBE-X mission concept. HEMA a large-area, high-throughput non-imaging pointed instrument based on Large Area Detector developed as part LOFT It designed for spectral timing measurements broad range sources and provides transformative increase in sensitivity to X-rays energy 2--30 keV compared previous instruments, with an effective area 3.4 m$^{2}$ at 8.5 resolution better than 300 eV 6 its nominal field regard.
The soft MeV gamma-ray sky, from a few hundred keV up to several MeV, is one of the least explored regions electromagnetic spectrum. most promising technology access this energy range telescope that uses Compton scattering detect gamma rays. Going measured data all-sky images ready for scientific interpretation, however, requires well-understood detector setup and multi-step data-analysis pipeline. We have developed these capabilities Spectrometer Imager (COSI). Starting with deep...
The Compton Spectrometer and Imager (COSI) is a balloon-borne compact telescope designed to survey the 0.2-5 MeV sky. COSI's energy resolution of $\sim$0.2% at 1.8 MeV, single-photon reconstruction, wide field view make it capable studying astrophysical nuclear lines, particularly 1809 keV $\gamma$-ray line from decaying Galactic $^{26}$Al. Most $^{26}$Al originates in massive stars core-collapse supernova nucleosynthesis, but path stellar evolution models Galaxy-wide emission remains...
There is a growing interest in the science uniquely enabled by observations MeV range, particularly light of multi-messenger astrophysics. The Compton Pair (ComPair) telescope, prototype AMEGO Probe-class concept, consists four subsystems that together detect and characterize gamma rays regime. A double-sided strip silicon Tracker gives precise measure first scatter interaction tracks pair-conversion products. novel cadmium zinc telluride (CZT) detector with excellent position energy...
NuSTAR is a hard X-ray satellite experiment to be launched in 2012. Two optics with 10.15 m focal length focus Xrays energies between 5 and 80 keV onto CdZnTe detectors located at the end of deployable mast. The FM1 FM2 flight were built same time based on design very similar components, thus performance both expected similar. We provide an overview calibration data that being used build response model for each optic describe initial results above 10 from ground optics. From preliminary...
Gamma-rays, the most energetic photons, carry information from far reaches of extragalactic space with minimal interaction or loss information. They bring messages about particle acceleration in environments so extreme they cannot be reproduced on earth for a closer look. Gamma-ray astrophysics is complementary collider work that physicists and astroparticle are often one same. instruments, especially Fermi Space Telescope, have been pivotal major multi-messenger discoveries over past...
Astronomical observations with gamma rays in the range of several hundred keV to hundreds MeV currently represent least explored energy range. To address this so-called gap, we designed and built a prototype thallium-doped CsI (CsI:Tl) calorimeter instrument using commercial off-the-shelf (COTS) silicon photomultipliers (SiPMs) front-ends, which may serve as subsystem for larger gamma-ray mission concept. During development, observed significant nonlinearity response. In addition, COTS...
The Compton Spectrometer and Imager (COSI) is a compact telescope which inherently sensitive to gamma-ray polarization in the energy range of 0.2-2.0 MeV. A long duration burst, GRB 160530A, was detected by COSI during its 2016 COSI's balloon flight. 160530A constrained based on distribution azimuthal scattering angles from each incident photon inside germanium detector array.<sup>1</sup> In order determine response identify systematic deviations an ideal sinusoidal modulation, performance...
We report on a simultaneous NuSTAR and Swift observation of the neutron star low-mass X-ray binary 4U 1728-34. identified removed four Type I bursts during in order to study persistent emission. The continuum spectrum is hard well described by black body with $kT=$ 1.5 keV cutoff power law $\Gamma=$ temperature 25 keV. Residuals between 6 8 provide strong evidence broad Fe K$\alpha$ line. By modeling relativistically blurred reflection model, we find an upper limit for inner disk radius...
The ComPair balloon instrument is a prototype gamma-ray telescope that aims to further develop technology for observing the sky in MeV regime. combines four detector subsystems enable parallel Compton scattering and pair-production detection, critical this energy range. This includes 10 layer double-sided silicon strip tracker, virtual Frisch grid low CZT calorimeter, high CsI plastic scintillator anti-coincidence detector. inaugural flight successfully launched from Columbia Scientific...
We give an overview of the science objectives and mission design "Spectroscopic Time-Resolving Observatory for Broadband Energy X-rays" observatory, which has been proposed as a NASA probe-class (∼$1.5B) in response to Astro2020 recommendation X-ray probe.