M. D. Reed
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View article: <i>K</i>2 observations of five pulsating subdwarf-B stars with white dwarf companions
<i>K</i>2 observations of five pulsating subdwarf-B stars with white dwarf companions Open
We report seismic analyses of five pulsating subdwarf B (sdBV) stars observed during Kepler’s K2 mission, each with a white dwarf companion. We find three of the five to be g-mode-dominated hybrid pulsators. For the other two, we only dete…
View article: Short-period pulsating hot subdwarf stars observed by TESS
Short-period pulsating hot subdwarf stars observed by TESS Open
We present the results of an extension of our Transiting Exoplanet Survey Satellite (TESS) search for short-period pulsations in compact stellar objects observed during the second and fourth years of the TESS mission, which targeted the no…
View article: Short-period pulsating hot-subdwarf stars observed by TESS II. Northern ecliptic hemisphere
Short-period pulsating hot-subdwarf stars observed by TESS II. Northern ecliptic hemisphere Open
We present results of a continuation of our Transiting Exoplanet Survey Satellite (TESS) search for short-period pulsations in compact stellar objects observed during Years 2 and 4 of the TESS mission that targeted the northern ecliptic he…
View article: Metrics and Methods for Radiation Detection Algorithm Characterization for Nuclear/Radiological Source Search
Metrics and Methods for Radiation Detection Algorithm Characterization for Nuclear/Radiological Source Search Open
This report presents a series of recommendations for data to train and evaluate radiation detection algorithms and performance metrics to evaluate these algorithms. These recommendations were formed through a community consensus approach t…
View article: <i>TESS</i> photometry of the pulsating hot subdwarf star V585 Peg
<i>TESS</i> photometry of the pulsating hot subdwarf star V585 Peg Open
We report on the first space-based observations of the bright, high-amplitude hybrid pulsator V585 Peg (Balloon 090100001). TESS observed V585 Peg for 28 d during Sector 56 from which we detect 14 g-mode pulsations, 20 p-mode pulsations, a…
View article: Kepler, K2, and TESS observations: ensemble and comparative asteroseismology
Kepler, K2, and TESS observations: ensemble and comparative asteroseismology Open
The original Kepler mission detected 18 pulsating subdwarf B (sdBV) stars, K2 observed 161 of our proposed targets with 41 sdB stars found to show p- or g-mode pulsations, and TESS has observed about 1,000 of our proposed targets. All thes…
View article: Asteroseismology of hot subdwarf B stars observed with TESS: discovery of two new gravity mode pulsating stars
Asteroseismology of hot subdwarf B stars observed with TESS: discovery of two new gravity mode pulsating stars Open
TIC 033834484 and TIC 309658435 are long-period pulsating subdwarf B stars, which were observed extensively (675 and 621 days, respectively) by the Transiting Exoplanet Survey Satellite (TESS). The high-precision photometric light curve re…
View article: K2 Photometry on Oscillation Mode Variability: The New Pulsating Hot B Subdwarf Star EPIC 220422705
K2 Photometry on Oscillation Mode Variability: The New Pulsating Hot B Subdwarf Star EPIC 220422705 Open
We present an analysis of oscillation mode variability in the hot B subdwarf star EPIC 220422705, a new pulsator discovered from ∼78 days of K2 photometry. The high-quality light curves provide a detection of 66 significant independent fre…
View article: Pulsating subdwarf B stars in the oldest open cluster NGC 6791
Pulsating subdwarf B stars in the oldest open cluster NGC 6791 Open
We report results of our analysis of the Kepler superaperture LC data of the open cluster NGC 6791 to search for pulsating sdB stars. We checked all pixels and we found only three sdB stars to be pulsating, KIC 2569576 (B3), KIC 2438324 (B…
View article: Deconvolution for Aerial Measurements
Deconvolution for Aerial Measurements Open
Avery Guild-Bingham will present these slides during the 9th Annual AMS Technical Exchange meeting (virtual) held on Oct 6-7, 2021. Attendees include Aerial Measuring System staff and partners from US laboratories, as well as Aerial Radiat…
View article: The pulsations of PG 1351+489
The pulsations of PG 1351+489 Open
PG 1351+489 is one of the 20 DBVs – pulsating helium-atmosphere white dwarf stars – known and has the simplest power spectrum for this class of star, making it a good candidate to study cooling rates. We report accurate period determinatio…
View article: Asteroseismology of extreme horizontal branch (subdwarf B) stars with TESS data
Asteroseismology of extreme horizontal branch (subdwarf B) stars with TESS data Open
During its primary mission, TESS observed over 550 of our target Subdwarf B (sdB) stars in short-cadence mode, from which we anticipate about 150 will be pulsating. This will allow an ensemble analysis of these interesting extreme horizont…
View article: Amplitude and frequency variability of the pulsating DB white dwarf stars KUV 05134+2605 and PG 1654+160 observed with the Whole Earth Telescope
Amplitude and frequency variability of the pulsating DB white dwarf stars KUV 05134+2605 and PG 1654+160 observed with the Whole Earth Telescope Open
We have acquired new time series photometry of the two pulsating DB white dwarf stars KUV 05134+2605 and PG 1654+160 with the Whole Earth Telescope. Additional single-site photometry is also presented. We use all these data plus all availa…
View article: Asteroseismic analysis of variable hot subdwarf stars observed with TESS
Asteroseismic analysis of variable hot subdwarf stars observed with TESS Open
Context. We present photometric and spectroscopic analyses of gravity ( g -mode) long-period pulsating hot subdwarf B (sdB) stars, also called V1093 Her stars, observed by the TESS space telescope in both 120 s short-cadence and 20 s ultra…
View article: Asteroseismic analysis of variable hot subdwarf stars observed with TESS I. The mean g-mode period spacings in hot subdwarf B stars
Asteroseismic analysis of variable hot subdwarf stars observed with TESS I. The mean g-mode period spacings in hot subdwarf B stars Open
We present photometric and spectroscopic analyses of gravity (g-mode) long-period pulsating hot subdwarf B (sdB) stars. We perform a detailed asteroseismic and spectroscopic analysis of five pulsating sdB stars observed with {\it TESS} aim…
View article: Space observations of AA Doradus provide consistent mass determinations. New HW-Vir systems observed with <i>TESS</i>
Space observations of AA Doradus provide consistent mass determinations. New HW-Vir systems observed with <i>TESS</i> Open
We present an overview of eclipsing systems of the HW-Virginis (HW-Vir) type, based on space observations from the Transiting Exoplanet Survey Satellite (TESS) mission. We perform a detailed analysis of the properties of AA Doradus (AA Dor…
View article: C3.3 Single Photon LiDAR Technology for Gas Imaging
C3.3 Single Photon LiDAR Technology for Gas Imaging Open
A LiDAR camera system combined with a laser tuned across a specific gas absorption can measure the distance and the quantity of gas present in the surrounding area.New technology now enables this measurement to be taken without the use of …
View article: PHL 417: a zirconium-rich pulsating hot subdwarf (V366 Aquarid) discovered in <i>K2</i> data
PHL 417: a zirconium-rich pulsating hot subdwarf (V366 Aquarid) discovered in <i>K2</i> data Open
The Kepler spacecraft observed the hot subdwarf star PHL 417 during its extended K2 mission, and the high-precision photometric light curve reveals the presence of 17 pulsation modes with periods between 38 and 105 min. From follow-up grou…
View article: <i>TESS</i> observations of pulsating subdwarf B stars: extraordinarily short-period gravity modes in CD−28° 1974
<i>TESS</i> observations of pulsating subdwarf B stars: extraordinarily short-period gravity modes in CD−28° 1974 Open
Transiting Exoplanet Survey Satellite (TESS) observations show CD−28° 1974 to be a gravity(g)-mode-dominated hybrid pulsating subdwarf B (sdBV) star. It shows 13 secure periods that form an ℓ = 1 asymptotic sequence near the typical period…
View article: K2 observations of the pulsating subdwarf B stars UY Sex and V1405 Ori
K2 observations of the pulsating subdwarf B stars UY Sex and V1405 Ori Open
We processed and analysed K2 observations of the pulsating subdwarf-B (sdBV) stars UY Sex and V1405 Ori. We detect 97 p-mode pulsations in UY Sex while we discover V1405 Ori to be a rare rich hybrid pulsator with over 100 p-mode pulsations…
View article: Mode identification in three pulsating hot subdwarfs observed with <i>TESS</i> satellite
Mode identification in three pulsating hot subdwarfs observed with <i>TESS</i> satellite Open
We report on the detection of pulsations of three pulsating subdwarf B stars observed by the Transiting Exoplanet Survey Satellite (TESS) satellite and our results of mode identification in these stars based on an asymptotic period relatio…
View article: Pedestrian Mapping with Spectral Backpacks for GPS-Denied Areas, RSLA-010-16, Year 1 of 1
Pedestrian Mapping with Spectral Backpacks for GPS-Denied Areas, RSLA-010-16, Year 1 of 1 Open
Presentation describes project to investigate methods to modernize radiological/nuclear search operations in GPS-denied environments. Having a reliable way to track a searcher’s position relative to the GPS-denied frame of reference (build…
View article: High-degree gravity modes in the single sdB star HD 4539
High-degree gravity modes in the single sdB star HD 4539 Open
HD 4539 (alias PG 0044 + 097 or EPIC 220641886) is a bright (V = 10.2) long-period V1093 Her-type subdwarf B (sdB) pulsating star that was observed by the Kepler spacecraft in its secondary (K2) mission. We use the K2 light curve (78.7 d) …
View article: K2 observations of the sdBV + dM/bd binaries PHL 457 and EQ Psc
K2 observations of the sdBV + dM/bd binaries PHL 457 and EQ Psc Open
We present an analysis of two pulsating subdwarf B stars PHL 457 and EQ Psc observed during the K2 mission. The K2 light curves of both stars show variation consistent with irradiation of a cooler companion by the hot subdwarf. They also s…
View article: Spatial Clustering Techniques for Access to Large and Dynamic Datasets from Mobile Devices Over 4G Networks RSLN-25-15, Year 1 of 1
Spatial Clustering Techniques for Access to Large and Dynamic Datasets from Mobile Devices Over 4G Networks RSLN-25-15, Year 1 of 1 Open
Presentation describes project to develop a framework for access to large datasets (i.e., millions of database objects, dynamically calculated values, or raster datasets that exceed 100s of Megabytes) from smart mobile devices with dynamic…
View article: Effect of CZT System Characteristics on Compton Scatter Event Recovery
Effect of CZT System Characteristics on Compton Scatter Event Recovery Open
Improving 511 keV photon detection sensitivity is a common goal for positron emission tomography system designers. One attractive approach to increase sensitivity is recovering events that are normally rejected. The kinematics of Compton s…
View article: Pulsations and eclipse-time analysis of HW Vir
Pulsations and eclipse-time analysis of HW Vir Open
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View article: Pulsations and eclipse-time analysis of HW Vir
Pulsations and eclipse-time analysis of HW Vir Open
MESA inlist associated with Pulsations and eclipse-time analysis of HW Vir
View article: Two <i>p</i>-mode dominated subdwarf B pulsators in binaries with F-star companions observed with K2
Two <i>p</i>-mode dominated subdwarf B pulsators in binaries with F-star companions observed with K2 Open
This paper presents spectroscopic and seismic analyses of two rare hybrid pulsating subdwarf B (sdB) stars, PG 0048+091 and PG 1315−123, which are dominated by pressure (p)-mode pulsations. These are only the second and third sdB pulsators…
View article: Development of large-volume high-performance monolithic CZT radiation detector
Development of large-volume high-performance monolithic CZT radiation detector Open
Recent progress with Cadmium Zinc Telluride (CZT) radiation sensors grown by the traveling heater method (THM) at Kromek is reported. Large volume monolithic pixelated detectors, 40×40×15 mm3 have been fabricated with good initial gamma sp…