245 citations · 3.8k across the 69 of their papers we have counts for
70 papers
Towards a standard procedure for the measurement of the multi-photon component in a CW telecom heralded single-photon source
E. Rebufello, F. Piacentini, M. López +8
Single-photon sources are set to be a fundamental tool for metrological applications as well as for quantum information related technologies. Because of their upcoming widespread d…
The detection of the blazar S4 0954+65 at very-high-energy with the MAGIC telescopes during an exceptionally high optical state
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +169
The very-high-energy (VHE, GeV) -ray MAGIC observations of the blazar S4 0954+65, were triggered by an exceptionally high flux state of emission in the optical. Th…
Indirect dark matter searches in the dwarf satellite galaxy Ursa Major II with the MAGIC Telescopes
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +142
The dwarf spheroidal galaxy Ursa Major II (UMaII) is believed to be one of the most dark-matter dominated systems among the Milky Way satellites and represents a suitable target fo…
Constraining Lorentz invariance violation using the Crab Pulsar emission observed up to TeV energies by MAGIC
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +142
Spontaneous breaking of Lorentz symmetry at energies on the order of the Planck energy or lower is predicted by many quantum gravity theories, implying non-trivial dispersion relat…
Performance of the MAGIC telescopes under moonlight
D. Guberman, P. Colin
MAGIC, a system of two imaging atmospheric Cherenkov telescopes, achieves its best performance under dark conditions, i.e. in absence of moonlight or twilight. Since operating the…
MAGIC observations of the microquasar V404 Cygni during the 2015 outburst
M. L. Ahnen, S. Ansoldi, L. A. Antonelli +142
The microquasar V404 Cygni underwent a series of outbursts in 2015, June 15-31, during which its flux in hard X-rays (20-40 keV) reached about 40 times the Crab Nebula flux. Becaus…
Observation of the Black Widow B1957+20 millisecond pulsar binary system with the MAGIC telescopes
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +145
B1957+20 is a millisecond pulsar located in a black widow type compact binary system with a low mass stellar companion. The interaction of the pulsar wind with the companion star w…
Performance of the MAGIC telescopes under moonlight
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +143
MAGIC, a system of two imaging atmospheric Cherenkov telescopes, achieves its best performance under dark conditions, i.e. in absence of moonlight or twilight. Since operating the…
First Multi-wavelength Campaign on the Gamma-ray-loud Active Galaxy IC 310
M. L. Ahnen, S. Ansoldi, L. A. Antonelli +160
The extragalactic VHE gamma-ray sky is rich in blazars. These are jetted active galactic nuclei viewed at a small angle to the line-of-sight. Only a handful of objects viewed at a…
MAGIC detection of very high energy gamma-ray emission from the low-luminosity blazar 1ES 1741+196
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +159
We present the first detection of the nearby (z=0.084) low-luminosity BL Lac object 1ES 1741+196 in the very high energy (VHE: E100 GeV) band. This object lies in a triplet of i…
A measurement of the ionization efficiency of nuclear recoils in silicon
F. Izraelevitch, D. Amidei, A. Aprahamian +26
We have measured the ionization efficiency of silicon nuclear recoils with kinetic energy between 1.8 and 20 keV. We bombarded a silicon-drift diode with a neutron beam to perform…
Multiband variability studies and novel broadband SED modeling of Mrk 501 in 2009
M. L. Ahnen, S. Ansoldi, L. A. Antonelli +290
We present an extensive study of the BL Lac object Mrk 501 based on a data set collected during the multi-instrument campaign spanning from 2009 March 15 to 2009 August 1 which inc…
Observations of Sagittarius A* during the pericenter passage of the G2 object with MAGIC
M. L. Ahnen, S. Ansoldi, L. A. Antonelli +153
Context. We present the results of a multi-year monitoring campaign of the Galactic Center (GC) with the MAGIC telescopes. These observations were primarily motivated by reports th…
A search for spectral hysteresis and energy-dependent time lags from X-ray and TeV gamma-ray observations of Mrk 421
A. U. Abeysekara, S. Archambault, A. Archer +220
Blazars are variable emitters across all wavelengths over a wide range of timescales, from months down to minutes. It is therefore essential to observe blazars simultaneously at di…
Detection of very high energy gamma-ray emission from the gravitationally-lensed blazar QSO B0218+357 with the MAGIC telescopes
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +151
Context. QSO B0218+357 is a gravitationally lensed blazar located at a redshift of 0.944. The gravitational lensing splits the emitted radiation into two components, spatially indi…
Long-term multi-wavelength variability and correlation study of Markarian 421 from 2007 to 2009
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +176
We study the multi-band variability and correlations of the TeV blazar Mrk 421 on year time scales, which can bring additional insight on the processes responsible for its broadban…
Super-orbital variability of LS I +61°303 at TeV energies
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +150
The gamma-ray binary LS I +61303 is a well established source from centimeter radio up to very high energy (VHE; E100 GeV). Its broadband emission shows a periodicity…
Deep observation of the NGC 1275 region with MAGIC: search of diffuse gamma-ray emission from cosmic rays in the Perseus cluster
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +154
Clusters of galaxies are expected to be reservoirs of cosmic rays (CRs) that should produce diffuse gamma-ray emission due to their hadronic interactions with the intra-cluster med…
Multiwavelength Study of Quiescent States of Mrk 421 with Unprecedented Hard X-Ray Coverage Provided by NuSTAR in 2013
M. Baloković, D. Paneque, G. Madejski +305
We present coordinated multiwavelength observations of the bright, nearby BL Lac object Mrk 421 taken in 2013 January-March, involving GASP-WEBT, Swift, NuSTAR, Fermi-LAT, MAGIC, V…
Very-high-energy gamma-rays from the Universe's middle age: detection of the z=0.940 blazar PKS 1441+25 with MAGIC
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +246
The flat-spectrum radio quasar PKS 1441+25 at a redshift of z = 0.940 is detected between 40 and 250 GeV with a significance of 25.5 σ using the MAGIC telescopes. Together with the…
Teraelectronvolt pulsed emission from the Crab pulsar detected by MAGIC
MAGIC Collaboration, S. Ansoldi, L. A. Antonelli +139
Aims: To investigate the extension of the very-high-energy spectral tail of the Crab pulsar at energies above 400 GeV. Methods: We analyzed 320 hours of good quality data of…
Status of the DAMIC direct dark matter search experiment
DAMIC Collaboration, A. Aguilar-Arevalo, D. Amidei +31
The DAMIC experiment uses fully depleted, high resistivity CCDs to search for dark matter particles. With an energy threshold 50 eV, and excellent energy and spatial r…
Very-high-energy γ-ray observations of novae and dwarf novae with the MAGIC telescopes
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +148
Context. In the last five years the Fermi Large Area Telescope (LAT) instrument detected GeV γ-ray emission from five novae. The GeV emission can be interpreted in terms of an inve…
Feasibility of VHE gamma ray detection by an array of imaging atmospheric Cherenkov telescopes using the fluorescence technique
J. L. Contreras, J. Rosado, F. Arqueros +3
The last 20 years have seen the development of new techniques in Astroparticle Physics providing access to the highest end of the electromagnetic spectrum. It has been shown that s…