A5017923730- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Dark Matter and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Neutrino Physics Research
- Particle Detector Development and Performance
- Pulsars and Gravitational Waves Research
- Astronomical Observations and Instrumentation
- Particle Accelerators and Free-Electron Lasers
- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Particle physics theoretical and experimental studies
- Astronomy and Astrophysical Research
- Radiation Detection and Scintillator Technologies
- Spectroscopy and Laser Applications
- Atmospheric aerosols and clouds
- Galaxies: Formation, Evolution, Phenomena
- Solar and Space Plasma Dynamics
- Calibration and Measurement Techniques
- Atmospheric chemistry and aerosols
- Air Quality Monitoring and Forecasting
- Stellar, planetary, and galactic studies
- Meteorological Phenomena and Simulations
- Geophysics and Gravity Measurements
Technical University of Munich
2018-2024
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2023-2024
Max Planck Institute for Physics
2014-2023
MAGIC Telescopes
2014-2022
Universidad Complutense de Madrid
2021
Deutsches Elektronen-Synchrotron DESY
2021
Max Planck Society
2011-2021
University of Udine
2021
Institute for High Energy Physics
2018-2021
Goethe University Frankfurt
2021
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...
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...
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...
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...
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...
Aims. We investigate the extension of very high-energy spectral tail Crab Pulsar at energies above 400 GeV.
We performed a 4.5-month multi-instrument campaign (from radio to VHE gamma rays) on Mrk421 between January 2009 and June 2009, which included VLBA, F-GAMMA, GASP-WEBT, Swift, RXTE, Fermi-LAT, MAGIC, Whipple, among other instruments collaborations. was found in its typical (non-flaring) activity state, with flux of about half that the Crab Nebula, yet light curves show significant variability at all wavelengths, highest being X-rays. determined power spectral densities (PSD) most wavelengths...
The flat-spectrum radio quasar PKS 1441+25 at a redshift of z = 0.940 is detected between 40 and 250 GeV with significance 25.5σ using the MAGIC telescopes. Together gravitationally lensed blazar QSO B0218+357 (z 0.944), most distant very high energy (VHE) to date. observations were triggered by an outburst in 2015 April seen energies Large Area Telescope on board Fermi. Multi-wavelength suggest subdivision state into two distinct flux states. In band covered MAGIC, variability timescale...
It is widely believed that the bulk of Galactic cosmic rays are accelerated in supernova remnants (SNRs). However, no observational evidence presence particles PeV energies SNRs has yet been found. The young historical SNR Cassiopeia A (Cas A) appears as one best candidates to study acceleration processes. Between December 2014 and October 2016 we observed Cas with MAGIC telescopes, accumulating 158 hours good-quality data. We derived spectrum source from 100 GeV 10 TeV. also analysed...
We present a measurement of the extragalactic background light (EBL) based on joint likelihood analysis 32 gamma-ray spectra for 12 blazars in redshift range z = 0.03 to 0.944, obtained by MAGIC telescopes and Fermi-LAT. The EBL is part diffuse radiation spanning ultraviolet, visible infrared bands. Major contributors are emitted stars through history universe, fraction it which was absorbed dust galaxies re-emitted at longer wavelengths. can be studied indirectly its effect very-high energy...
On January 14, 2019, the Major Atmospheric Gamma Imaging Cherenkov telescopes detected GRB 190114C above 0.2 TeV, recording most energetic photons ever observed from a gamma-ray burst. We use this unique observation to probe an energy dependence of speed light in vacuo for as predicted by several quantum gravity models. Based on set assumptions possible intrinsic spectral and temporal evolution, we obtain competitive lower limits quadratic leading order modification.
Extended and delayed emission around distant TeV sources induced by the effects of propagation gamma rays through intergalactic medium can be used for measurement magnetic field (IGMF). We search GeV from hard-spectrum blazar 1ES 0229+200 with goal to detect or constrain IGMF-dependent secondary flux generated during medium. analyze most recent MAGIC observations over a 5 year time span complement them historic data H.E.S.S. VERITAS telescopes along 12-year long exposure Fermi/LAT telescope....
We report the results of observation nearby satellite galaxy Segue 1 performed by MAGIC-I ground-based gamma-ray telescope between November 2008 and March 2009 for a total 43.2 hours. No significant emission was found above background. Differential upper limits on flux are derived assuming various power-law slopes possible spectrum. Integral also calculated several spectra different energy thresholds. The values order 10^{-11} ph cm^{-2}$ s^{-1} 100 GeV 10^{-12} cm^{-2} 200 GeV. is currently...
We report on the detection of very-high energy (VHE, E > 100 GeV) γ-ray emission from NGC 1275, central radio galaxy Perseus cluster galaxies. The source has been detected by MAGIC telescopes with a statistical significance 6.6σ above GeV in 46 h stereo observations carried out between August 2010 and February 2011. measured differential spectrum 70 500 can be described power law steep spectral index Γ = −4.1 ± 0.7stat 0.3syst, average flux is Fγ (1.3 0.2stat 0.3syst) × 10-11 cm-2 s-1. These...
Among more than fifty blazars detected in very high energy (VHE, E>100GeV) gamma-rays, only three belong to the subclass of Flat Spectrum Radio Quasars (FSRQs). MAGIC observed FSRQ PKS 1510-089 February-April 2012 during a activity state (HE, E>100 MeV) gamma-ray band by AGILE and Fermi. observations result detection source with significance 6.0 sigma. In agreement previous VHE source, we find no statistically significant variability daily, weekly or monthly time scales. The other two...
We report on the observation of $\gamma$-rays above 25\,GeV from Crab pulsar (PSR B0532+21) using MAGIC I telescope. Two data sets observations during winter period 2007/2008 and 2008/2009 are used. In order to discuss spectral shape 100\,MeV 100\,GeV, one year public {\it Fermi} Large Area Telescope ({\it Fermi}-LAT) also analyzed complement data. The extrapolation exponential cutoff spectrum determined with Fermi-LAT is inconsistent measurements, which requires a modification standard...
We use 73 h of stereoscopic data taken with the MAGIC telescopes to investigate very high-energy (VHE) gamma-ray emission Crab pulsar. Our show a highly significant pulsed signal in energy range from 50 400 GeV both main pulse (P1) and interpulse (P2) phase regions. provide widest spectra date VHE components peaks, these extend satellite-borne observatories. The good resolution background rejection system allows us cross-check correctness each spectral point pulsar by comparison...