Theo Schutt
A5044133537- Astrophysical Phenomena and Observations
- CCD and CMOS Imaging Sensors
- Adaptive optics and wavefront sensing
- Cosmology and Gravitation Theories
- Astronomical Observations and Instrumentation
- Pulsars and Gravitational Waves Research
- Dark Matter and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Mechanics and Biomechanics Studies
- Stellar, planetary, and galactic studies
- Particle Detector Development and Performance
- Astronomy and Astrophysical Research
- Calibration and Measurement Techniques
- Geomagnetism and Paleomagnetism Studies
- Satellite Image Processing and Photogrammetry
- Precipitation Measurement and Analysis
- Advanced Fluorescence Microscopy Techniques
- Particle Accelerators and Free-Electron Lasers
Kavli Institute for Particle Astrophysics and Cosmology
2023-2025
Menlo School
2024-2025
Stanford University
2023-2025
SLAC National Accelerator Laboratory
2023-2024
Columbia University
2019-2021
We present the point-spread function (PSF) modeling for weak lensing shear measurement using full six years of Dark Energy Survey (DES Y6) data. review PSF estimation procedure PIFF (PSFs In Full FOV) software package and describe key improvements made to diagnostics since DES year three (Y3) analysis: (i) use external Gaia infrared photometry catalogs ensure higher purity stellar sample used model fitting, (ii) addition color-dependent modeling, first any analysis, (iii) inclusion...
Our understanding of the $\gamma$-ray sky has improved dramatically in past decade, however, unresolved background (UGRB) still a potential wealth information about faintest sources pervading Universe. Statistical cross-correlations with tracers cosmic structure can indirectly identify populations that most characterize background. In this study, we analyze angular correlation between and matter distribution Universe as traced by gravitational lensing, leveraging more than decade...
Spatial variations in the cosmic electron density after reionization generate microwave background anisotropies via Thomson scattering, a process known as ``patchy screening" effect. In this paper, we propose new estimator for patchy screening effect that is designed to mitigate biases from dominant foreground signals. We use it measure cross-correlation between \textit{unWISE} galaxies and screening, latter measured by Atacama Cosmology Telescope \textit{Planck} satellite. report first...
Abstract We present an investigation of the quiescent and transient X-ray binaries (XRBs) Galactic Center (GC). extended our Chandra analysis non-thermal sources, located in central parsec, from Hailey et al. (2018), using additional 4.6 Msec ACIS-S data obtained 2012–2018. The individual spectra 12 sources fit to absorbed power-law model with a mean photon index Γ ≈ 2 show no Fe emission lines. Long-term variability was detected nine them, confirming that majority are XRBs. Frequent...
Thomson scattering of cosmic microwave background (CMB) photons imprints various properties the baryons around galaxies on CMB. One such imprint, called patchy screening, is a direct probe gas density profile galaxies. It usefully complements information from kinematic and thermal Sunyaev-Zel'dovich effects does not require individual redshifts. In this paper, we derive new estimators screening ``temperature inversion'' (TI) ``signed'' estimators, analogous to gradient inversion estimator...
Abstract The Vera C. Rubin Observatory’s LSST Camera (LSSTCam) pixel response has been characterized using laboratory measurements with a grid of artificial stars. We quantify the contributions to photometry, centroid, point-spread function size, and shape measurement errors due small anomalies in LSSTCam CCDs. main sources those are quantum efficiency variations area induced by amplifier segmentation boundaries “tree-rings”—circular silicon doping concentration. This study stars projected...
Abstract 2HWC J1928+177 is a Galactic TeV gamma-ray source detected by the High Altitude Water Cherenkov (HAWC) Observatory up to ∼56 TeV. The HAWC source, later confirmed Energy Stereoscopic System, still remains unidentified as dark accelerator since there no apparent supernova remnant or pulsar wind nebula in lower-energy bands. radio PSR J1928+1746, coinciding with position, has X-ray counterpart. Our SED modeling shows that inverse Compton scattering putative can account for emission...
Abstract We report NuSTAR and Chandra observations of two X-ray transients, SWIFT J174540.7−290015 (T15) J174540.2−290037 (T37), which were discovered by the Neil Gehrels Swift Observatory in 2016 within r ∼ 1 pc Sgr A*. detected bright outbursts from T15 T37, likely soft hard states, with 3–79 keV luminosities 8 × 10 36 3 37 erg s −1 , respectively. No have previously been transients our ACIS analysis puts an upper limit L X ≲ 2 31 on their quiescent 2–8 luminosities. pulsations,...
Thomson scattering of cosmic microwave background (CMB) photons imprints various properties the baryons around galaxies on CMB. One such imprint, called patchy screening, is a direct probe gas density profile galaxies. It usefully complements information from kinematic and thermal Sunyaev-Zel'dovich effects does not require individual redshifts. In this paper, we derive new estimators screening "temperature inversion" (TI) "signed" estimators, analogous to gradient inversion estimator CMB...
The LSST Camera for the Vera C. Rubin Observatory has been constructed at SLAC National Accelerator Laboratory. covers a 3.5-degree field of view with 3.2 gigapixels. goal survey is to provide well-understood astronomical source catalog community. Camera's focal plane populated by 189 sensors on science that are combination E2V CCD250 and ITL STA3800 deep-depletion, back-illuminated devices, accompanying eight guide sensors, four wavefront sensors. Nine grouped as "Raft" three identical...
The Vera C. Rubin Observatory's LSST Camera (LSSTCam) pixel response has been characterized using laboratory measurements with a grid of artificial stars. We quantify the contributions to photometry, centroid, point-spread function size, and shape measurement errors due small anomalies in LSSTCam CCDs. main sources those are quantum efficiency variations area induced by amplifier segmentation boundaries "tree-rings" - circular silicon doping concentration. This study stars projected on...
In 2018, we reported our discovery of a dozen quiescent X-ray binaries in the central parsec (pc) Galaxy (Hailey et al. 2018). recent follow-up paper (Mori 2021), published an extended analysis these sources and other (XRBs) pc beyond, showing that most if not all 12 non-thermal are likely black hole low-mass binary (BH-LMXB) candidates. response, Maccarone 2022 (TM22 hereafter) argued, primarily on claim neutron star (NS-LMXBs) often do have short outburst recurrence times (<~ 10 yr), they...