O. Blanch

ORCID: 0000-0002-8380-1633
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About
Contact & Profiles
Research Areas
  • Astrophysics and Cosmic Phenomena
  • Gamma-ray bursts and supernovae
  • Dark Matter and Cosmic Phenomena
  • Radio Astronomy Observations and Technology
  • Astrophysical Phenomena and Observations
  • Particle Detector Development and Performance
  • Neutrino Physics Research
  • Radiation Detection and Scintillator Technologies
  • Pulsars and Gravitational Waves Research
  • Particle physics theoretical and experimental studies
  • Astronomical Observations and Instrumentation
  • Particle Accelerators and Free-Electron Lasers
  • Atmospheric Ozone and Climate
  • Astronomy and Astrophysical Research
  • Cosmology and Gravitation Theories
  • Solar and Space Plasma Dynamics
  • Calibration and Measurement Techniques
  • High-Energy Particle Collisions Research
  • Geophysics and Gravity Measurements
  • Galaxies: Formation, Evolution, Phenomena
  • Noncommutative and Quantum Gravity Theories
  • Adaptive optics and wavefront sensing
  • Stellar, planetary, and galactic studies
  • Gyrotron and Vacuum Electronics Research
  • Nuclear Physics and Applications

Institute for High Energy Physics
2016-2025

Universitat de Barcelona
2024

Institut d'Estudis Espacials de Catalunya
2024

Instituto de Astrofísica de Canarias
2024

Universidad de La Laguna
2024

Institute of Science and Technology
2024

Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2003-2023

Durham University
2023

Université Paris Cité
2007-2023

Turku Centre for Computer Science
2023

Ground-based gamma-ray astronomy has had a major breakthrough with the impressive results obtained using systems of imaging atmospheric Cherenkov telescopes. huge potential in astrophysics, particle physics and cosmology. CTA is an international initiative to build next generation instrument, factor 5-10 improvement sensitivity 100 GeV 10 TeV range extension energies well below above TeV. will consist two arrays (one north, one south) for full sky coverage be operated as open observatory....

10.1007/s10686-011-9247-0 article EN cc-by-nc Experimental Astronomy 2011-11-22

Using data collected at the Pierre Auger Observatory during past 3.7 years, we demonstrated a correlation between arrival directions of cosmic rays with energy above 6 × 10 19 electron volts and positions active galactic nuclei (AGN) lying within ∼75 megaparsecs. We rejected hypothesis an isotropic distribution these least 99% confidence level from prescribed priori test. The observed is compatible that highest-energy particles originate nearby extragalactic sources whose flux has not been...

10.1126/science.1151124 article EN Science 2007-11-09

The Cherenkov Telescope Array, CTA, will be the major global observatory for very high energy gamma-ray astronomy over next decade and beyond. scientific potential of CTA is extremely broad: from understanding role relativistic cosmic particles to search dark matter. an explorer extreme universe, probing environments immediate neighbourhood black holes voids on largest scales. Covering a huge range in photon 20 GeV 300 TeV, improve all aspects performance with respect current instruments....

10.1142/10986 preprint EN 2018-02-26

The energy spectrum of cosmic rays above 2.5 x 10;{18} eV, derived from 20,000 events recorded at the Pierre Auger Observatory, is described. spectral index gamma particle flux, J proportional, variantE;{-gamma}, energies between 4 eV and 10;{19} 2.69+/-0.02(stat)+/-0.06(syst), steepening to 4.2+/-0.4(stat)+/-0.06(syst) higher energies. hypothesis a single power law rejected with significance greater than 6 standard deviations. data are consistent prediction by Greisen Zatsepin Kuz'min.

10.1103/physrevlett.101.061101 article EN Physical Review Letters 2008-08-04

We describe the measurement of depth maximum, X{max}, longitudinal development air showers induced by cosmic rays. Almost 4000 events above 10;{18} eV observed fluorescence detector Pierre Auger Observatory in coincidence with at least one surface station are selected for analysis. The average shower maximum was found to evolve energy a rate (106{-21}{+35}) g/cm{2}/decade below 10{18.24+/-0.05} eV, and (24+/-3) this energy. measured shower-to-shower fluctuations decrease from about 55 26...

10.1103/physrevlett.104.091101 article EN Physical Review Letters 2010-03-01

We present the first joint analysis of gamma-ray data from MAGIC Cherenkov telescopes and Fermi Large Area Telescope (LAT) to search for signals dark matter annihilation in dwarf satellite galaxies. combine 158 hours Segue 1 observations with 6-year 15 galaxies by -LAT. obtain limits on cross-section particle masses between 10 GeV 100 TeV—the widest mass range ever explored a single analysis. These improve previously published -LAT results up factor two at certain masses. Our new inclusive...

10.1088/1475-7516/2016/02/039 article EN Journal of Cosmology and Astroparticle Physics 2016-02-01

Very high energy (VHE) γ-ray emission from the flat spectrum radio quasar (FSRQ) PKS 1222+21 (4C 21.35, z = 0.432) was detected with MAGIC Cherenkov telescopes during a short observation (∼0.5 hr) performed on 2010 June 17. The detection coincides high-energy MeV/GeV activity measured by Large Area Telescope (LAT) board Fermi satellite. VHE extends about 70 GeV up to at least 400 and can be well described power-law dN/dE ∝ E−Γ photon index Γ 3.75 ± 0.27stat 0.2syst. averaged integral flux...

10.1088/2041-8205/730/1/l8 article EN The Astrophysical Journal Letters 2011-02-25

The Cherenkov Telescopes Array (CTA) is planned as the future instrument for very-high-energy (VHE) gamma-ray astronomy with a wide energy range of four orders magnitude and an improvement in sensitivity compared to current instruments about order magnitude. Monte Carlo simulations are crucial tool design CTA. ultimate goal these find most cost-effective solution given physics goals thus or find, cost, best suited different types targets Apart from uncertain component cost estimates, main...

10.1016/j.astropartphys.2012.10.002 article EN cc-by Astroparticle Physics 2012-10-22

Abstract A neutrino with energy ∼290 TeV, IceCube-170922A, was detected in coincidence the BL Lac object TXS 0506+056 during enhanced gamma-ray activity, chance being rejected at ∼3 σ level. We monitored very-high-energy (VHE) band Major Atmospheric Gamma-ray Imaging Cherenkov (MAGIC) telescopes for ∼41 hr from 1.3 to 40.4 days after detection. Day-timescale variability is clearly resolved. interpret quasi-simultaneous and broadband electromagnetic observations a novel one-zone...

10.3847/2041-8213/aad083 article EN cc-by The Astrophysical Journal Letters 2018-08-08

We provide an updated assessment of the power Cherenkov Telescope Array (CTA) to search for thermally produced dark matter at TeV scale, via associated gamma-ray signal from pair-annihilating particles in region around Galactic centre. find that CTA will open a new window discovery potential, significantly extending range robustly testable models given standard cuspy profile density distribution. Importantly, even cored profile, projected sensitivity be sufficient probe various...

10.1088/1475-7516/2021/01/057 article EN cc-by Journal of Cosmology and Astroparticle Physics 2021-01-27

10.1016/j.nima.2009.11.018 article EN Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 2010-01-01

The surface detector array of the Pierre Auger Observatory is sensitive to Earth-skimming tau neutrinos that interact in Earth's crust. Tau leptons from ${\ensuremath{\nu}}_{\ensuremath{\tau}}$ charged-current interactions can emerge and decay atmosphere produce a nearly horizontal shower with significant electromagnetic component. data collected between 1 January 2004 31 August 2007 are used place an upper limit on diffuse flux at EeV energies. Assuming...

10.1103/physrevlett.100.211101 article EN Physical Review Letters 2008-05-27

Supermassive black holes with masses of millions to billions solar are commonly found in the centers galaxies. Astronomers seek image jet formation using radio interferometry, but still suffer from insufficient angular resolution. An alternative method resolve small structures is measure time variability their emission. Here, we report on gamma-ray observations galaxy IC 310 obtained MAGIC telescopes revealing doubling scales faster than 4.8 min. Causality constrains size emission region be...

10.1126/science.1256183 article EN Science 2014-11-07

We present the results of stereoscopic observations satellite galaxy Segue 1 with MAGIC Telescopes, carried out between 2011 and 2013. With almost 160 hours good-quality data, this is deepest observational campaign on any dwarf performed so far in very high energy range electromagnetic spectrum. search large data sample for signals dark matter particles mass 100 GeV 20 TeV. For we use full likelihood analysis method, which provides optimal sensitivity to characteristic gamma-ray spectral...

10.1088/1475-7516/2014/02/008 article EN cc-by Journal of Cosmology and Astroparticle Physics 2014-02-06

Aims. We investigate the extension of very high-energy spectral tail Crab Pulsar at energies above 400 GeV.

10.1051/0004-6361/201526853 article EN Astronomy and Astrophysics 2015-11-13
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