The Stereoscopic Analog Trigger of the MAGIC Telescopes

Dazzi, F.; Schweizer, T.; Ceribella, Giovanni; Corti, Daniele; Dettlaff, A.; Garcia, J. Rodriguez; Häfner, D.; Herranz, D.; López-Moya, Marcos; Mariotti, M.; Maier, Ronald; Metz, Stephan; Mirzoyan, R.; Nakajima, D.; Saito, T.; Shayduk, M.; Sitarek, J.; Strom, D.; Teshima, M.; Tran, Si Bui Quang; Will, Martin

doi:10.1109/tns.2021.3079262

Cited by 16 publications

(10 citation statements)

References 22 publications

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“…To reach a lower energy threshold, MAGIC has developed a stereoscopic analog trigger (SumTriggerII) [8]. Using SumTriggerII, MAGIC has been able to detect the Geminga pulsar in the energy range 15 GeV-75 GeV [9]: the first time that a middle-aged pulsar has been detected up to these energies.…”

Section: Geminga Pulsar Detection From 15 Gevmentioning

confidence: 99%

Grimoire¹ of the MAGIC telescopes

Manganaro

2023

J. Phys.: Conf. Ser.

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The MAGIC (Major Atmospheric Gamma-ray Imaging Cherenkov) telescopes are a system of two Cherenkov telescopes located on the Canary island of La Palma (Spain), at the Roque de Los Muchachos Observatory, and operating in stereo mode since 2009. Their design and dedicated trigger system allows to reach an energy threshold of 50 GeV, which can be lowered to 15 GeV when using the Sum-Trigger-II. This made it possible to observe sources at the limit of detection for imaging atmospheric Cherenkov telescopes (z∼1) and to deeply study the Geminga pulsar tail emission. A strategy of alert follow-ups from other facilities and the fast repositioning of the telescopes made possible the detection of the first neutrino associated with a blazar and of gamma-ray bursts in the very-high-energy (VHE, E>100 GeV) gamma-ray band, respectively. Moreover, the discovery of GRB190114C allowed a test of general relativity through the study of the Lorentz Invariant Violation. Recently MAGIC observed the first VHE gamma-ray nova, RS Ophiuchi, revealing that protons are accelerated to hundreds of gigaelectronvolts in the nova shock. In this talk we will go through the MAGIC recent highlights in the study of galactic and extragalactic sources, spanning from multimessenger astronomy to astroparticle and fundamental physics.

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Section: Geminga Pulsar Detection From 15 Gevmentioning

confidence: 99%

Grimoire¹ of the MAGIC telescopes

Manganaro

2023

J. Phys.: Conf. Ser.

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“…We collected the data in stereoscopic mode with the Sum-Trigger-II system. This system is designed to improve the performance of the telescopes in the sub-100 GeV energy range (Dazzi et al 2021).…”

Section: Magic Observations and Data Analysismentioning

confidence: 99%

“…Since then, the performance of the MAGIC telescopes has significantly improved (Aleksić et al 2016a). In this paper, we report results from an analysis of 11.5 years of Fermi-LAT data, together with ∼90 hours of data from new MAGIC stereoscopic observations of J0218, collected from November 2018 to November 2019, using the low-energy threshold Sum-Trigger-II system (Dazzi et al 2021). The structure of the paper is as follows: Section 2.1 describes the Fermi-LAT data analysis.…”

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confidence: 99%

Search for Very High-energy Emission from the Millisecond Pulsar PSR J0218+4232

Acciari

Ansoldi²,

Antonelli

et al. 2021

ApJ

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PSR J0218+4232 is one of the most energetic millisecond pulsars known and has long been considered as one of the best candidates for very high-energy (VHE; >100 GeV) γ-ray emission. Using 11.5 yr of Fermi Large Area Telescope (LAT) data between 100 MeV and 870 GeV, and ∼90 hr of Major Atmospheric Gamma Imaging Cherenkov (MAGIC) observations in the 20 GeV to 20 TeV range, we searched for the highest energy γ-ray emission from PSR J0218+4232. Based on the analysis of the LAT data, we find evidence for pulsed emission above 25 GeV, but see no evidence for emission above 100 GeV (VHE) with MAGIC. We present the results of searches for γ-ray emission, along with theoretical modeling, to interpret the lack of VHE emission. We conclude that, based on the experimental observations and theoretical modeling, it will remain extremely challenging to detect VHE emission from PSR J0218+4232 with the current generation of Imaging Atmospheric Cherenkov Telescopes, and maybe even with future ones, such as the Cherenkov Telescope Array.

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“…The data set consists of 72.7 hr of good quality data, spread over 73 nights. The second half of the dataset (since MJD 58122) has been taken with the novel Sum-Trigger-II [12]. That part of the dataset was analyzed with a dedicated low-energy analysis procedures including a special image cleaning [13,14].…”

Section: Observations and Data Analysismentioning

confidence: 99%