Performance of the ASTRI Mini-Array at the Observatorio del Teide

Lombardi, S.; Antonelli, Luc; Bigongiari, C.; Cardillo, M.; Gallozzi, S.; Green, J. G.; Lucarelli, F.; Saturni, F. G.

doi:10.22323/1.395.0884

Cited by 21 publications

(33 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, with the current MAGIC telescopes, more than ∼3600 hours would be required to detect 20-200 TeV emission at the tail. Such observations could be possible with the new generation of γ-ray observatories, CTA/ASTRI (Bernlöhr et al 2013;Lombardi et al 2021).…”

Section: Discussionmentioning

confidence: 99%

MAGIC observations provide compelling evidence of hadronic multi-TeV emission from the putative PeVatron SNR G106.3+2.7

Abe

Acciari

et al. 2023

A&A

View full text Add to dashboard Cite

Context. Certain types of supernova remnants (SNRs) in our Galaxy are assumed to be PeVatrons, capable of accelerating cosmic rays (CRs) to ∼ PeV energies. However, conclusive observational evidence for this has not yet been found. The SNR G106.3+2.7, detected at 1-100 TeV energies by different γ-ray facilities, is one of the most promising PeVatron candidates. This SNR has a cometary shape, which can be divided into a head and a tail region with different physical conditions. However, in which region the 100 TeV emission is produced has not yet been identified because of the limited position accuracy and/or angular resolution of existing observational data. Additionally, it remains unclear as to whether the origin of the γ-ray emission is leptonic or hadronic. Aims. With the better angular resolution provided by new MAGIC data compared to earlier γ-ray datasets, we aim to reveal the acceleration site of PeV particles and the emission mechanism by resolving the SNR G106.3+2.7 with 0.1 • resolution at TeV energies. Methods. We observed the SNR G106.3+2.7 using the MAGIC telescopes for 121.7 hours in total -after quality cuts-between May 2017 and August 2019. The analysis energy threshold is ∼ 0.2 TeV, and the angular resolution is 0.07-0.1 • . We examined the γ-ray spectra of different parts of the emission, whilst benefitting from the unprecedented statistics and angular resolution at these energies provided by our new data. We also used measurements at other wavelengths such as radio, X-rays, GeV γ-rays, and 10 TeV γ-rays to model the emission mechanism precisely. Results. We detect extended γ-ray emission spatially coincident with the radio continuum emission at the head and tail of SNR G106.3+2.7. The fact that we detect a significant γ-ray emission with energies above 6.0 TeV from only the tail region suggests that the emissions above 10 TeV detected with air shower experiments (Milagro, HAWC, Tibet ASγ and LHAASO) are emitted only from the SNR tail. Under this assumption, the multi-wavelength spectrum of the head region can be explained with either hadronic or leptonic models, while the leptonic model for the tail region is in contradiction with the emission above 10 TeV and X-rays. In contrast, the hadronic model could reproduce the observed spectrum at the tail by assuming a proton spectrum with a cutoff energy of ∼ 1 PeV for that region. Such high-energy emission in this middle-aged SNR (4-10 kyr) can be explained by considering a scenario where protons escaping from the SNR in the past interact with surrounding dense gases at present. Conclusions. The γ-ray emission region detected with the MAGIC telescopes in the SNR G106.3+2.7 is extended and spatially coincident with the radio continuum morphology. The multi-wavelength spectrum of the emission from the tail region suggests proton acceleration up to ∼ PeV, while the emission mechanism of the head region could either be hadronic or leptonic.

show abstract

Section: Discussionmentioning

confidence: 99%

MAGIC observations provide compelling evidence of hadronic multi-TeV emission from the putative PeVatron SNR G106.3+2.7

Abe

Acciari

et al. 2023

A&A

View full text Add to dashboard Cite

show abstract

“…A complete description of the telescope can be found in several papers and references therein (see e.g. [15]). Here we summarize some general info together with those features that are of main interest for the analysis presented in this paper.…”

Section: The Astri-hornmentioning

confidence: 99%

Gain variations as induced by the diffuse night sky background: the ASTRI-Horn experience

Impiombato

Compagnino

Mineo

et al. 2022

Preprint

View full text Add to dashboard Cite

ASTRI-Horn is the prototype of the nine telescopes that form the ASTRI Mini-Array, under construction at the Teide Observatory in Spain, devoted to observe the sky above 10 TeV. It adopts an innovative optical design based on a dual-mirror Schwarzschild-Couder configuration, and the camera, composed by a matrix of monolithic multipixel silicon photomultipliers (SiPMs) is managed by ad-hoc tailored front-end electronics based on a peak-detector operation mode. During the Crab Nebula campaign in 2018-2019, ASTRI-Horn was affected by gain variations induced by high levels of night sky background. This paper reports the work performed to detect and quantify the effects of these gain variations in shower images. The analysis requested the use of simultaneous observations of the night sky background flux in the wavelength band 300-650 nm performed with the auxiliary instrument UVscope, a calibrated multi-anode photomultiplier working in single counting mode. As results, a maximum gain reduction of 15% was obtained, in agreement with the value previously computed from the variance of the background level in each image. This ASTRI-Horn gain reduction was caused by current limitation of the voltage supply. The analysis presented in this paper provides a method to evaluate possible variations in the nominal response of SiPMs when scientific observations are performed in the presence of high night sky background as in dark or gray conditions.

show abstract

“…However, the characteristics of the area, the possibility to exploit available site infrastructures, the safety of operations and the impact on the activities of Teide observatory were also considered. The number of telescopes of the ASTRI Mini-Array guarantees a sensitivity better than existing facilities already at 10 TeV in the northern hemisphere and at 15 TeV in the case of the southern ones [8]. The position of the telescopes and their spacing has been analysed using Monte Carlo simulations.…”

Section: Pos(icrc2021)897mentioning

confidence: 99%

The ASTRI Mini-Array at Teide Observatory

Antonelli¹

2021

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

View full text Add to dashboard Cite

The ASTRI Mini-Array is an international project led by the Italian National Institute of Astrophysics (INAF) with the participation of the Instituto de Astrofisica de Canarias, Brazil and South Africa to be installed at the Teide Observatory, in Tenerife, to observe the Very High Energy sky in the range of a few TeV up to 100 TeV and beyond. The ASTRI Mini-Array technology is based on the ASTRI-Horn prototype, a small-sized Cherenkov telescope (SST) developed by INAF within the Cherenkov Telescope Array (CTA) Project and located in Italy at the INAF "M.C. Fracastoro" observing station (Mt. Etna, Sicily). The telescope is characterized by a dual-mirror optical system and curved focal surface covered by a SiPM sensors camera managed by a fast front-end electronics. The ASTRI Mini-Array is composed of nine ASTRI-Horn-like telescopes. It is going to be developed by the ASTRI Collaboration in all aspects from the design, construction and implementation of the entire hardware and software system, including a dedicated off-site Data Center, to the final scientific products. The ASTRI Mini-Array is going to be operated as an observation facility led by INAF and thanks to its sensitivity, especially at energies greater than 1 TeV, represents the key instrument to perform very soon a ground breaking achievement in the field of extreme gamma rays, up to 100 TeV and beyond. In this contribution, the project status and the expected performance of the ASTRI Mini-Array will be reviewed.

show abstract

Performance of the ASTRI Mini-Array at the Observatorio del Teide

Cited by 21 publications

References 7 publications

MAGIC observations provide compelling evidence of hadronic multi-TeV emission from the putative PeVatron SNR G106.3+2.7

MAGIC observations provide compelling evidence of hadronic multi-TeV emission from the putative PeVatron SNR G106.3+2.7

Gain variations as induced by the diffuse night sky background: the ASTRI-Horn experience

The ASTRI Mini-Array at Teide Observatory

Contact Info

Product

Resources

About