A5048161480- Gamma-ray bursts and supernovae
- SAS software applications and methods
- Astronomical Observations and Instrumentation
- Cosmology and Gravitation Theories
- Superconducting and THz Device Technology
- Radio Astronomy Observations and Technology
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Galaxies: Formation, Evolution, Phenomena
- Astrophysical Phenomena and Observations
- Stellar, planetary, and galactic studies
- Adaptive optics and wavefront sensing
- Particle physics theoretical and experimental studies
- Physics of Superconductivity and Magnetism
- Astro and Planetary Science
- Calibration and Measurement Techniques
- Geophysics and Gravity Measurements
- Atomic and Molecular Physics
- Astrophysics and Star Formation Studies
- Satellite Communication Systems
- Particle Detector Development and Performance
- Pulsars and Gravitational Waves Research
- Antenna Design and Optimization
- Microwave Engineering and Waveguides
Princeton University
2024-2025
Case Western Reserve University
2018-2023
Stanford University
2018
University of Illinois Urbana-Champaign
2018
Cardiff University
2018
Kavli Institute for Particle Astrophysics and Cosmology
2018
Argonne National Laboratory
2018
SLAC National Accelerator Laboratory
2018
Pennsylvania State University
2013
University of Strathclyde
2012
We present measurements of the $E$-mode ($EE$) polarization power spectrum and temperature-$E$-mode ($TE$) cross-power cosmic microwave background using data collected by SPT-3G, latest instrument installed on South Pole Telescope. This analysis uses observations a $1500\text{ }\text{ }{\mathrm{deg}}^{2}$ region at 95, 150, 220 GHz taken over four-month period in 2018. report binned values $EE$ $TE$ spectra angular multipole range $300\ensuremath{\le}\ensuremath{\ell}<3000$, multifrequency...
We present a sample-variance-limited measurement of the temperature power spectrum ($TT$) cosmic microwave background using observations $\ensuremath{\sim}1500\text{ }\text{ }{\mathrm{deg}}^{2}$ field made by SPT-3G in 2018. report multifrequency measurements at 95, 150, and 220 GHz covering angular multipole range $750\ensuremath{\le}\ensuremath{\ell}<3000$. combine this $TT$ with published polarization from 2018 observing season update their associated covariance matrix to complete...
SPT-3G is the third survey receiver operating on South Pole Telescope dedicated to high-resolution observations of cosmic microwave background (CMB). Sensitive measurements temperature and polarization anisotropies CMB provide a powerful dataset for constraining cosmology. Additionally, surveys with arcminute-scale resolution are capable detecting galaxy clusters, millimeter-wave bright galaxies, variety transient phenomena. The instrument provides significant improvement in mapping speed...
We present a measurement of gravitational lensing over 1500 deg2 the Southern sky using SPT-3G temperature data at 95 GHz and 150 taken in 2018. The amplitude relative to fiducial Planck 2018 Lambda cold dark matter (ΛCDM) cosmology is found be 1.020±0.060, excluding instrumental astrophysical systematic uncertainties. conduct extensive null tests check robustness measurements, report minimum-variance combined power spectrum angular multipoles 50<L<2000, which we use constrain cosmological...
Abstract We present the detection and characterization of fluctuations in linearly polarized emission from atmosphere above South Pole. These measurements make use data SPT-3G receiver on Pole Telescope three frequency bands centered at 95, 150, 220 GHz. cross-correlation between detectors to produce an unbiased estimate power Stokes I , Q U parameters large angular scales. Our results are consistent with signal being produced by combination Rayleigh scattering thermal radiation ground a...
We report results from an analysis aimed at detecting the trispectrum of kinematic Sunyaev-Zel'dovich (kSZ) effect by combining data South Pole Telescope (SPT) and Herschel-SPIRE experiments over a 100 deg^{2} field. The SPT observations combine previous current surveys, namely SPTpol SPT-3G, to achieve depths 4.5, 3, 16 μK-arcmin in bands centered 95, 150, 220 GHz. For SPIRE, we include 600 857 GHz bands. reconstruct velocity-induced large-scale correlation small-scale kSZ signal with...
The South Pole Telescope (SPT) is a millimeter-wavelength telescope designed for high-precision measurements of the cosmic microwave background (CMB). SPT measures both temperature and polarization CMB with large aperture, resulting in high resolution maps sensitive to signals across wide range angular scales on sky. With these data, has potential make broad cosmological measurements. These include constraining effect massive neutrinos large-scale structure formation as well cleaning...
We infer the mean optical depth of a sample optically-selected galaxy clusters from Dark Energy Survey (DES) via pairwise kinematic Sunyaev-Zel'dovich (kSZ) effect. The kSZ signal between pairs drawn DES Year-3 cluster catalog is detected at $4.1 \sigma$ in cosmic microwave background (CMB) temperature maps two years observations with SPT-3G camera on South Pole Telescope. After cuts, there are 24,580 $\sim 1,400$ deg$^2$ southern sky observed by both experiments. techniques. inferred...
Ultralight axionlike particles (ALPs) are compelling dark matter candidates because of their potential to resolve small-scale discrepancies between $\Lambda$CDM predictions and cosmological observations. Axion-photon coupling induces a polarization rotation in linearly polarized photons traveling through an ALP field; thus, as the local field oscillates time, distant static sources will appear oscillate with frequency proportional mass. We use observations cosmic microwave background from...
Abstract We forecast constraints on cosmological parameters enabled by three surveys conducted with SPT-3G, the third-generation camera South Pole Telescope. The cover separate regions of 1500, 2650, and 6000 deg 2 to different depths, in total observing 25% sky. These will be measured white noise levels roughly 2.5, 9, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mn>12</mml:mn> <mml:mspace width="0.33em"/> <mml:mi>μ</mml:mi> <mml:mi...
The detection of satellite thermal emission at millimeter wavelengths is presented using data from the 3rd-Generation receiver on South Pole Telescope (SPT-3G). This represents first reported artificial satellites wavelengths. Satellite shown to be detectable high signal-to-noise timescales as short a few tens milliseconds. An algorithm for downloading orbital information and tracking known given observer constraints time-ordered observatory pointing described. Consequences cosmological...
High-contrast imaging techniques now make possible both and spectroscopy of planets around nearby stars. We present the optical design for Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS), a lenslet-based, cryogenic integral field spectrograph (IFS) exoplanets on Subaru telescope. The IFS will provide spectral information 138x138 spatial elements over 2.07 arcsec x view (FOV). CHARIS operate in near infrared (lambda = 1.15 - 2.5 microns) feature two resolution modes R 18...
Abstract We present a flare star catalog from 4 yr of nontargeted millimeter-wave survey data the South Pole Telescope (SPT). The were taken with SPT-3G camera and cover 1500 deg 2 region sky 20 h 40 m 0 s to 3 in right ascension −42° −70° declination. This was observed on nearly daily cadence 2019 2022 chosen avoid plane galaxy. A short-duration transient search this yields 111 flaring events 66 stars, increasing number both detected stars by an order magnitude previous release. provide...
The third-generation South Pole Telescope camera (SPT-3G) improves upon its predecessor (SPTpol) by an order of magnitude increase in detectors on the focal plane. technology used to read out and control these detectors, digital frequency-domain multiplexing (DfMUX), is conceptually same as for SPTpol, but extended accommodate more detectors. A nearly 5× expansion readout operating bandwidth has enabled use this large plane, SPT-3G performance meets forecasting targets relevant science...
Les observations, par le satellite Spacelab-2, d'un sursaut RX situe dans la region du centre galactique sont presentees. Il est montre que cet objet, precedemment associe a SLX 1744-299, constitue de 2 sources, plus au Sud etant premiere source persistante Centre Galactique identifiee une
A detailed comparison between the X-ray spectra calculated for model atmospheres in neutron stars and observed of bursts is presented. Comptonization free–free absorption emission processes are taken into account, as effects iron its last three states ionization. Two types formulated: (i) a constant density atmosphere (ii) an approximate hydrostatic equilibrium. We obtain general correction formulae colour temperature effective by folding through EXOSAT detector response. have fitted models...