A5079541413- Radio Astronomy Observations and Technology
- Pulsars and Gravitational Waves Research
- Antenna Design and Optimization
- Astrophysical Phenomena and Observations
- Dark Matter and Cosmic Phenomena
- Experimental and Theoretical Physics Studies
- CCD and CMOS Imaging Sensors
- Radio Wave Propagation Studies
- Particle Detector Development and Performance
- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Advanced Data Storage Technologies
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Superconducting and THz Device Technology
- Big Data Technologies and Applications
Stony Brook University
2022-2025
Brookhaven National Laboratory
2022
We present the first results from a dark matter search using six Skipper-CCDs in SENSEI detector operating at SNOLAB. employ bias-mitigation technique of hiding approximately 46% our total data and aggressively mask images to remove backgrounds. Given exposure after masking 100.72 gram-days well-performing sensors, we observe 55 two-electron events, 4 three-electron no events containing 4-10 electrons. The are consistent with pileup one-electron events. Among 2 appear pixels that likely...
We present an open source Python library for simulating overlapping (i.e., blended) images of galaxies and performing self-consistent comparisons detection deblending algorithms based on a suite metrics. The package, named Blending Toolkit (BTK), serves as modular, flexible, easy-to-install, simple-to-use interface exploring analyzing systematic effects related to blended in cosmological surveys such the Vera Rubin Observatory Legacy Survey Space Time (LSST). BTK has three main components:...
We present the first results from a dark matter search using six Skipper-CCDs in SENSEI detector operating at SNOLAB. With an exposure of 534.9 gram-days well-performing sensors, we select events containing 2 to 10 electron-hole pairs. After aggressively masking images remove backgrounds, observe 55 two-electron events, 4 three-electron and no electrons. The are consistent with pileup one-electron events. Among appear pixels that likely impacted by defects, although not strongly enough...
Contrary to a prevailing assumption that black holes would swiftly discharge, we argue can charge preferentially when boosted through an ambient magnetic field. Though the details are very different, preference for is related precipitation of Wald on spinning hole in The gravitoelectrodynamics upstage naive arguments about screening electric fields---in vacuum---in determining value accrued. Charged test particles, which build up charge, exhibit chaotic behavior as evidenced by fractal basin...
The four-point correlation function is the lowest order for scalar fields that can be used to probe statistical parity invariance in an isotropic universe. There are intriguing claims of detection violation 4-point BOSS galaxy clustering data. We apply same estimator public SDSS Data Release 16 Lyman-$\alpha$ forest data probes a different redshift range and sensitive density regime using completely technique. A would therefore strong indication new physics. identify accurate covariance...
Contrary to a prevailing assumption that black holes would swiftly discharge, we argue can charge preferentially when boosted through an ambient magnetic field. Though the details are very different, preference for is related precipitation of Wald on spinning hole in The gravito-electrodynamics upstage naive arguments about screening electric fields determining value accrued. Charged test particles, which build up charge, exhibit chaotic behavior as evidenced by fractal basin boundaries...
Redundant calibration is a technique in radio astronomy that allows of arrays whose antennas lie on lattice by exploiting the fact redundant baselines should see same sky signal. Because number measured visibilities scales quadratically with but unknowns describing individual antenna responses and available information about only linearly array size, problem always over-constrained as long big dense enough. This true even for non-lattice configurations. In this work we study generalized...
Redundant calibration is a technique in radio astronomy that allows of arrays whose antennas lie on lattice by exploiting the fact redundant baselines should see same sky signal. Because number measured visibilities scales quadratically with but unknowns describing individual antenna responses and available information about only linearly array size, problem always over-constrained as long big dense enough. This true even for non-lattice configurations. In this work we study generalized...