Search Results - "Giesbrecht Paiva, J. G."
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1
Multimessenger Characterization of Markarian 501 during Historically Low X-Ray and γ-Ray Activity
Published in The Astrophysical journal. Supplement series (01-06-2023)“…Abstract We study the broadband emission of Mrk 501 using multiwavelength observations from 2017 to 2020 performed with a multitude of instruments, involving,…”
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2
Performance and first measurements of the MAGIC Stellar Intensity Interferometer
Published 07-02-2024“…In recent years, a new generation of optical intensity interferometers has emerged, leveraging the existing infrastructure of Imaging Atmospheric Cherenkov…”
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3
Constraints on axion-like particles with the Perseus Galaxy Cluster with MAGIC
Published 15-01-2024“…Axion-like particles (ALPs) are pseudo-Nambu-Goldstone bosons that emerge in various theories beyond the standard model. These particles can interact with…”
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4
Performance of the joint LST-1 and MAGIC observations evaluated with Crab Nebula data
Published 03-10-2023“…A&A 680, A66 (2023) Aims. LST-1, the prototype of the Large-Sized Telescope for the upcoming Cherenkov Telescope Array Observatory, is concluding its…”
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5
Search for Gamma-ray Spectral Lines from Dark Matter Annihilation up to 100 TeV towards the Galactic Center with MAGIC
Published 20-12-2022“…Line-like features in TeV $\gamma$-rays constitute a ''smoking gun'' for TeV-scale particle dark matter and new physics. Probing the Galactic Center region…”
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6
MAGIC observations provide compelling evidence of the hadronic multi-TeV emission from the putative PeVatron SNR G106.3+2.7
Published 28-11-2022“…A&A 671, A12 (2023) The SNR G106.3+2.7, detected at 1--100 TeV energies by different $\gamma$-ray facilities, is one of the most promising PeVatron candidates…”
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7
Long-term multi-wavelength study of 1ES 0647+250
Published 23-11-2022“…A&A 670, A49 (2023) The BL Lac object 1ES 0647+250 is one of the few distant $\gamma$-ray emitting blazars detected at very high energies (VHE, $\gtrsim$100…”
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Gamma-ray observations of MAXI J1820+070 during the 2018 outburst
Published 06-10-2022“…MAXI J1820+070 is a low-mass X-ray binary with a black hole as a compact object. This binary underwent an exceptionally bright X-ray outburst from March to…”
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9
Search for Gamma-Ray Spectral Lines from Dark Matter Annihilation up to 100 TeV toward the Galactic Center with MAGIC
Published in Physical review letters (10-02-2023)“…Linelike features in TeV γ rays constitute a "smoking gun" for TeV-scale particle dark matter and new physics. Probing the Galactic Center region with…”
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10
MAGIC detection of GRB 201216C at z = 1.1
Published in Monthly notices of the Royal Astronomical Society (01-01-2024)“…ABSTRACT Gamma-ray bursts (GRBs) are explosive transient events occurring at cosmological distances, releasing a large amount of energy as electromagnetic…”
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Gamma-ray observations of MAXI J1820+070 during the 2018 outburst
Published in Monthly notices of the Royal Astronomical Society (01-12-2022)“…ABSTRACT MAXI J1820+070 is a low-mass X-ray binary with a black hole (BH) as a compact object. This binary underwent an exceptionally bright X-ray outburst…”
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12
Gamma-ray observations of MAXI J1820+070 during the 2018 outburst
Published in Monthly notices of the Royal Astronomical Society (23-09-2022)“…ABSTRACT MAXI J1820+070 is a low-mass X-ray binary with a black hole (BH) as a compact object. This binary underwent an exceptionally bright X-ray outburst…”
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13
Constraints on axion-like particles with the Perseus Galaxy Cluster with MAGIC
Published in PHYSICS OF THE DARK UNIVERSE (01-05-2024)“…Axion-like particles (ALPs) are pseudo-Nambu–Goldstone bosons that emerge in various theories beyond the standard model. These particles can interact with…”
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14
Insights from the first flaring activity of a high-synchrotron-peaked blazar with X-ray polarization and VHE gamma rays
Published 30-10-2024“…We study a flaring activity of the HSP Mrk421 that was characterized from radio to very-high-energy (VHE; E $>0.1$TeV) gamma rays with MAGIC, Fermi-LAT, Swift,…”
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15
Multi-wavelength study of OT 081: broadband modelling of a transitional blazar
Published 29-10-2024“…OT 081 is a well-known, luminous blazar that is remarkably variable in many energy bands. We present the first broadband study of the source which includes…”
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16
Standardised formats and open-source analysis tools for the MAGIC telescopes data
Published 27-09-2024“…Instruments for gamma-ray astronomy at Very High Energies ($E>100\,{\rm GeV}$) have traditionally derived their scientific results through proprietary data and…”
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17
Constraints on Lorentz invariance violation from the extraordinary Mrk 421 flare of 2014 using a novel analysis method
Published 11-06-2024“…The Lorentz Invariance Violation (LIV), a proposed consequence of certain quantum gravity (QG) scenarios, could instigate an energy-dependent group velocity…”
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The variability patterns of the TeV blazar PG 1553+113 from a decade of MAGIC and multi-band observations
Published 04-03-2024“…PG 1553+113 is one of the few blazars with a convincing quasi-periodic emission in the gamma-ray band. The source is also a very high-energy (VHE; >100 GeV)…”
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19
Insights into the broad-band emission of the TeV blazar Mrk 501 during the first X-ray polarization measurements
Published 16-01-2024“…We present the first multi-wavelength study of Mrk 501 including very-high-energy (VHE) gamma-ray observations simultaneous to X-ray polarization measurements…”
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20
First characterization of the emission behavior of Mrk421 from radio to VHE gamma rays with simultaneous X-ray polarization measurements
Published 17-12-2023“…We perform the first broadband study of Mrk421 from radio to TeV gamma rays with simultaneous measurements of the X-ray polarization from IXPE. The data were…”
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