Oscar Chaparro-Amaro
A5081872513- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Gamma-ray bursts and supernovae
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Radiation Detection and Scintillator Technologies
- Pulsars and Gravitational Waves Research
- Astrophysical Phenomena and Observations
- Radiation Therapy and Dosimetry
- Advanced Proteomics Techniques and Applications
- Radio Astronomy Observations and Technology
- Cosmology and Gravitation Theories
- Inorganic Fluorides and Related Compounds
- Error Correcting Code Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Bioinformatics and Genomic Networks
- Machine Learning in Bioinformatics
- Nuclear Physics and Applications
- Solar and Space Plasma Dynamics
- Image and Signal Denoising Methods
- Advanced Chemical Physics Studies
- Blind Source Separation Techniques
- Algorithms and Data Compression
- Sparse and Compressive Sensing Techniques
Instituto Politécnico Nacional
2020-2024
Campbell Collaboration
2023
Autonomous University of Chiapas
2023
RWTH Aachen University
2021
National Institute of Astrophysics, Optics and Electronics
2021
Universidad Nacional Autónoma de México
2021
Barnard College
2021
California University of Pennsylvania
2021
Abstract Galactic gamma-ray diffuse emission (GDE) is emitted by cosmic rays (CRs), ultra-relativistic protons, and electrons, interacting with gas electromagnetic radiation fields in the interstellar medium. Here we present analysis of teraelectronvolt from a region plane over range longitude l ∈ [43°, 73°], using data collected High Altitude Water Cherenkov (HAWC) detector. Spectral, longitudinal, latitudinal distributions are shown. The spectrum compatible arising CR population an index...
We report the first detection of a TeV γ-ray flux from solar disk (6.3σ), based on 6.1 years data High Altitude Water Cherenkov (HAWC) observatory. The 0.5–2.6 spectrum is well fit by power law, dN/dE=A(E/1 TeV)−γ, with A=(1.6±0.3)×10−12 TeV−1 cm−2 s−1 and γ=3.62±0.14. shows strong indication anticorrelation activity. These results extend bright, hard GeV emission observed Fermi-LAT, seemingly due to hadronic Galactic cosmic rays showering nuclei in atmosphere. However, current theoretical...
Abstract We present the results of dark matter (DM) searches in a sample 31 dwarf irregular (dIrr) galaxies within field view HAWC Observatory. dIrr are DM-dominated objects which astrophysical gamma-ray emission is estimated to be negligible with respect secondary flux expected by annihilation or decay weakly interacting massive particles (WIMPs). While we do not see any statistically significant DM signal galaxies, exclusion limits (95% C.L.) for cross section and lifetime WIMP candidates...
The open-source Multi-Mission Maximum likelihood (3ML) Framework allows for the common analysis of diverse datasets. ability to consistently fit and characterize astronomical data across many decades in energy is key understanding origin emission we measure with different instruments. 3ML uses plugins encapsulate interfaces instrument response functions. user can then define a model one or multiple sources describe given region interest. determine locations, spatial shapes, spectra model....
Context. Ground-based γ-ray astronomy is still a rather young field of research, with strong historical connections to particle physics. This why most observations are conducted by experiments proprietary data and analysis software, as usual in the physics field. However, recent years, this paradigm has been slowly shifting toward development use open-source formats tools, driven upcoming observatories such Cherenkov Telescope Array (CTA). In context, community-driven, shared format (the...
Abstract The latest High Altitude Water Cherenkov (HAWC) point-like source catalog up to 56 TeV reported the detection of two sources in region Galactic plane at galactic longitude 52° < ℓ 55°, 3HWC J1930+188 and J1928+178. first one is associated with a known source, supernova remnant SNR G054.1+00.3. It was discovered by currently operating Imaging Atmospheric Telescope (IACT), Very Energetic Radiation Array System (VERITAS), detected Energy Stereoscopic (H.E.S.S), identified as...
Abstract The Galactic Halo is a key target for indirect dark matter detection. High Altitude Water Cherenkov (HAWC) observatory high-energy (∼300 GeV to >100 TeV) gamma-ray detector located in central Mexico. HAWC operates via the water technique and has both wide field of view ∼ 2 sr >95% duty cycle, making it ideal analyses highly extended sources. We made use these properties new background-estimation optimized sources probe large region signals. With this approach, we set improved...
Full detector simulation was among the largest CPU consumer in all CERN experiment software stacks for first two runs of Large Hadron Collider (LHC). In early 2010's, projections were that demands would scale linearly with luminosity increase, compensated only partially by an increase computing resources. The extension fast approaches to more use cases, covering a larger fraction budget, is part solution due intrinsic precision limitations. remainder corresponds speeding-up several factors,...
The Galactic gamma-ray diffuse emission is produced by the interaction of cosmic rays with ambient gas and electromagnetic radiation fields in interstellar medium (ISM). Studying this helps reconstruct particle transport mechanisms distribution Galaxy. In work, we analyze TeV a chosen region plane using data collected High Altitude Water Cherenkov (HAWC) detector. energy spatial distributions have been studied after subtracting extended point sources detected greater than 5 sigma...
Current knowledge of the relative abundances and energy spectra elemental mass groups cosmic rays in $10$ TeV - $1$ PeV interval is uncertain. This situation prevents carrying out precision tests that may lead to distinguish among existing hypotheses on origin propagation galaxy. In order learn more about composition these particles, we have employed HAWC data from hadron induced air showers determine three rays: protons, helium heavy nuclei with $Z > 2$. The were estimated by using Gold...
Abstract This paper reports on the γ -ray properties of 2018 Galactic nova V392 Per, spanning photon energies ∼0.1 GeV–100 TeV by combining observations from Fermi Gamma-ray Space Telescope and HAWC Observatory. As one most rapidly evolving signals yet observed for a nova, GeV -rays with power-law spectrum an index Γ = 2.0 ± 0.1 were detected over 8 days following Per’s optical maximum. constrain signal during this time also before after. We observe no statistically significant evidence...
The Galactic gamma-ray diffuse emission (GDE) is emitted by cosmic rays (CRs), ultra-relativistic protons and electrons, interacting with gas electromagnetic radiation fields in the interstellar medium. Here we present analysis of TeV from a region Plane over range longitude $l\in[43^\circ,73^\circ]$, using data collected High Altitude Water Cherenkov (HAWC) detector. Spectral, longitudinal latitudinal distributions are shown. spectrum compatible arising CR population an "index" similar to...
Abstract Full detector simulation was among the largest CPU consumers in all CERN experiment software stacks for first two runs of Large Hadron Collider. In early 2010s, it projected that demands would scale linearly with increasing luminosity, only partial compensation from computing resources. The extension fast approaches to cover more use cases represent a larger fraction budget is part solution, because intrinsic precision limitations. remainder corresponds speeding up by several...
Galaxy clusters' dynamics constitute a major piece of evidence for the existence dark matter in astrophysical structures. The decay or annihilation particles is hypothesized to produce steady flux very-high-energy gamma rays correlated with direction cluster galaxies. Virgo cluster, being only ~16 Mpc away and spanning several degrees across sky an excellent target search signatures particle interactions. High Altitude Water Cherenkov (HAWC) observatory, due its wide field view sensitivity...
Thanks to recent technological development, a new generation of cosmic ray experiments have been developed with more sensitivity study these particles in the primary energy interval from 10 TeV 1 PeV, such as HAWC. Due its design and high altitude, HAWC gamma-ray observatory can provide bridge between data direct indirect detectors. In 2017 collaboration published first result on total spectrum rays, which covers range 500 TeV. This work updates previous by extending measured all-particle...
Background showers triggered by hadrons represent over 99.9% of all particles arriving at ground-based gamma-ray observatories. An important stage in the data analysis these observatories, therefore, is removal hadron-triggered showers. Currently, High-Altitude Water Cherenkov (HAWC) observatory employs an algorithm based on a single cut two variables, unlike other observatories (e.g. H.E.S.S., VERITAS), which employ large number variables to separate primary particles. In this work, we...
The High Altitude Water Cherenkov (HAWC) Observatory is a wide-field-of-view gamma-ray observatory that optimized to detect gamma rays between ~300 GeV and several hundred TeV. HAWC Collaboration recently released their third source catalog (3HWC), which contains 65 sources. One of these sources, the ultra-high-energy 3HWC J1908+063, may exhibit hardening spectral index at highest energies (above 56 TeV). At least two populations particles are needed satisfactorily explain energy emission....
Many gamma-ray bursts (GRBs) have been observed from radio wavelengths, and a few at very-high energies (VHEs, > 100GeV). The HAWC observatory is well suited to study transient phenomena VHEs due its large field of view duty cycle. These features allow for searches VHE emission can probe different model assumptions duration spectra. In this paper, we use data collected by between December 2014 May 2020 search in the energy range 80 800 GeV coming sample 47 short GRBs that triggered Fermi,...
Two cosmic-ray experiments, PAMELA and AMS-02, measured an abnormal positron excess above 10 GeV. This is well understood, but it has been considered direct evidence of dark matter. However, this could be produced by nearby pulsars too. The HAWC collaboration previously studied the extended gamma-ray emission two pulsars, Geminga PSR B0656+14, found no significant contribution to from these pulsars. previous study led reinterpretation our result initiated concept inverse Compton (IC) halos....
In this work, the image block matching based on dissimilarity measure is investigated. Moreover, an unsupervised approach implemented to yield that algorithms have low complexity (in numbers of operations) compared full search algorithm. The state-of-the-art experiments only use discrete cosine transform as a domain transform. addition, some images were tested evaluate algorithms. However, these not evaluated according specific characteristics. So, in paper, improved version presented tackle...
In this paper, we present the implementation of Density Functional Theory (DFT) method using Geant4-DNA framework in Single Instruction Data (SISD) mode. Furthermore, is improved terms execution time within GeantV project with vectorization techniques such as Multiple (SIMD). Within framework, a set SIMD strategies molecular calculation algorithms one-electron operators, two-electron operator, quadrature grids, and functionals, was implemented VecCore library. The applications developed work...
The extragalactic background light (EBL) contains all the radiation emitted by nuclear and accretion processes in stars compact objects since epoch of recombination. Measuring EBL density directly is challenging, especially near- to far-infrared waveband, mainly due zodiacal foreground. Instead, gamma-ray astronomy offers possibility indirectly set limits on studying effects absorption very high energy (VHE:$>$100 GeV) spectra distant blazars. High Altitude Water Cherenkov gamma ray...
The high-energy Diffuse Gamma-Ray Background (DGRB) is expected to be produced by unresolved isotropically distributed astrophysical objects, potentially including dark matter annihilation or decay emissions in galactic extragalactic structures. DGRB has only been observed below 1 TeV; above this energy, upper limits have reported. Observations stringent on the energy could significant multi-messenger implications, such as constraining origin of TeV-PeV neutrinos detected IceCube. High...