Cody Jessup
A5059693672- Pulsars and Gravitational Waves Research
- Radio Astronomy Observations and Technology
- Advanced Frequency and Time Standards
- Advanced Fluorescence Microscopy Techniques
- Gamma-ray bursts and supernovae
- Image Processing Techniques and Applications
- Retinal Development and Disorders
- Photochromic and Fluorescence Chemistry
- Medical Imaging Techniques and Applications
- Superconducting and THz Device Technology
- Advanced NMR Techniques and Applications
- Nuclear Physics and Applications
- Solar and Space Plasma Dynamics
- Cell Image Analysis Techniques
- Computational Physics and Python Applications
- High-pressure geophysics and materials
- Particle Accelerators and Free-Electron Lasers
- Digital Holography and Microscopy
- Electron Spin Resonance Studies
Hillsdale College
2018-2024
Montana State University
2020-2024
Abstract We present high-precision timing data over time spans of up to 11 years for 45 millisecond pulsars observed as part the North American Nanohertz Observatory Gravitational Waves (NANOGrav) project, aimed at detecting and characterizing low-frequency gravitational waves. The were with Arecibo and/or Green Bank Telescope frequencies ranging from 327 MHz 2.3 GHz. Most approximately monthly cadence, six high-timing-precision weekly. All widely separated each observing epoch in order fit...
Abstract We present observations and timing analyses of 68 millisecond pulsars (MSPs) comprising the 15 yr data set North American Nanohertz Observatory for Gravitational Waves (NANOGrav). NANOGrav is a pulsar array (PTA) experiment that sensitive to low-frequency gravitational waves (GWs). This NANOGrav’s fifth public release, including both “narrowband” “wideband” time-of-arrival (TOA) measurements corresponding models. have added 21 MSPs extended our baselines by 3 yr, now spanning nearly...
We present time-of-arrival (TOA) measurements and timing models of 47 millisecond pulsars (MSPs) observed from 2004 to 2017 at the Arecibo Observatory Green Bank Telescope by North American Nanohertz for Gravitational Waves (NANOGrav). The observing cadence was three four weeks most over this time span, with weekly observations six sources. These data were collected use in low-frequency gravitational wave searches other astrophysical purposes. detail our observational methods a set TOA...
We present a new analysis of the profile data from 47 millisecond pulsars comprising 12.5-year set North American Nanohertz Observatory for Gravitational Waves (NANOGrav), which is presented in parallel paper (Alam et al. 2021a; NG12.5). Our reprocessing performed using "wideband" timing methods, use frequency-dependent template profiles, simultaneous time-of-arrival (TOA) and dispersion measure (DM) measurements broadband observations, novel techniques. In particular, wideband DM are used...
Accurately measuring the translations of objects between images is essential in many fields, including biology, medicine, chemistry, and physics. One important application tracking one or more particles by their apparent displacements a series images. Popular methods, such as center mass, often require idealized scenarios to reach shot noise limit particle and, therefore, are not generally applicable multiple image types. More general maximum likelihood estimation, reliably approach limit,...
Abstract We use cyclic spectroscopy to perform high-frequency resolution analyses of multihour baseband Arecibo observations the millisecond pulsar PSR B1937+21. This technique allows for examination scintillation features in far greater detail than is otherwise possible under most timing array observing setups. measure bandwidths and timescales each eight subbands across a 200 MHz band observation. Through these measurements we obtain intra-epoch estimates frequency scalings bandwidth...
We use cyclic spectroscopy to perform high frequency-resolution analyses of multi-hour baseband Arecibo observations the millisecond pulsar PSR B1937+21. This technique allows for examination scintillation features in far greater detail than is otherwise possible under most timing array observing setups. measure bandwidths and timescales each eight subbands across a 200 MHz band observation. Through these measurements we obtain intra-epoch estimates frequency scalings bandwidth...
Accurately measuring the translations of objects between images is essential in many fields, including biology, medicine, chemistry, and physics. One important application tracking one or more particles by their apparent displacements a series images. Popular methods, such as center-of-mass, often require idealized scenarios to reach shot-noise limit particle are, therefore, not generally applicable multiple image types. More general like maximum likelihood estimation, reliably approach...