MAGIC observations of the diffuse γ -ray emission in the vicinity of the Galactic center
D. Kerszberg; E. Colombo; J. Palacio; W. Bhattacharyya; G. Busetto; M. Hütten; A. Chilingaryan; P. Majumdar; L. Maraschi; W. Rhode; N. Giglietto; J. Besenrieder; U. Barres de Almeida; M. Mariotti; A. Berti; J. Herrera; B. Machado de Oliveira Fraga; A. Fernández-Barral; S. Tsujimoto; K. Nishijima; P. Da Vela; S. Sakurai; F. Leone; J. M. Paredes; Ž. Bošnjak; R. J. García López; V. Vagelli; P. G. Prada Moroni; V. A. Acciari; R. Carosi; F. Dazzi; D. Hadasch; D. Morcuende; V. Vitale; B. Banerjee; M. Takahashi; K. Ishio; E. Moretti; M. Manganaro; A. Somero; E. Prandini; V. Fallah Ramazani; A. Stamerra; Y. Chai; L. Bellizzi; V. Neustroev; H. Kubo; J. Becerra González; M. Doro; L. Di Venere; Y. Suda; A. Fattorini; A. Rugliancich; S. Fukami; C. Nigro; L. A. Antonelli; M. Minev; A. Arbet Engels; L. Foffano; S. Gasparyan; V. Moreno; E. Molina; T. Saito; Y. Iwamura; C. Fruck; K. Noda; D. Sobczynska; P. Peñil; N. Torres-Albà; G. Maneva; C. Righi; P. Temnikov; ; J. M. Miranda; N. Godinović; A. Babić; S. M. Colak; S. Ansoldi; S. Nozaki; S. Loporchio; J. Rico; M. Will and D. Zarić; D. Mazin; P. Munar-Adrover; D. Elsaesser; L. Jouvin; C. F. Vigorito; W. Bednarek; D. Dorner; A. Biland; M. Vazquez Acosta; D. Green; T. Surić; S. Lombardi; S. Covino; A. De Angelis; M. V. Fonseca; I. Šnidarić; A. Hahn; K. Mannheim; I. Puljak; M. Peresano; O. Blanch; R. Mirzoyan; D. Baack; E. Bernardini; S. Paiano; J. Kushida; U. Colin; F. Di Pierro; L. Nogués; C. Maggio; M. Delfino; S. Cikota; D. Paneque; R. López-Coto; J. L. Contreras; S. Masuda; J. Hoang; S. Inoue; E. Lindfors; M. López; F. Longo; D. Hrupec; M. Ribó; D. Dominis Prester; D. Miceli; L. Saha; J. Cortina; J. van Scherpenberg; M. Palatiello; A. López-Oramas; M. Nöthe; K. Satalecka; T. Terzić; E. Do Souto Espiñeira; M. Strzys; F. Tavecchio; T. Inada; N. Sahakyan; L. Font; B. De Lotto; D. Ninci; K. Nilsson; M. Makariev; L. Tosti; J. Sitarek; D. Strom; M. Teshima; C. Bigongiari; M. Gaug; G. Ceribella; A. Moralejo; M. Martínez; M. Persic; D. Depaoli; M. Mallamaci; F. Giordano; I. Vovk; A. Donini; D. Lelas; M. Garczarczyk; T. Schweizer; G. Bonnoli; V. D’Elia; J. Delgado; D. Fidalgo; G. Vanzo; K. Schmidt; G. Ferrara; D. Guberman; S. Mićanović; R. Paoletti; J. A. Barrio; A. Lamastra
https://urn.fi/URN:NBN:fi-fe2021042827132
Tiivistelmä
Aims. In the presence of a sufficient amount of target material, γ-rays can be used as a tracer in the search for sources of Galactic cosmic rays (CRs). Here we present deep observations of the Galactic center (GC) region with the MAGIC telescopes and use them to infer the underlying CR distribution and to study the alleged PeV proton accelerator at the center of our Galaxy.
Methods. We used data from ≈100 h observations of the GC region conducted with the MAGIC telescopes over five years (from 2012 to 2017). Those were collected at high zenith angles (58−70 deg), leading to a larger energy threshold, but also an increased effective collection area compared to low zenith observations. Using recently developed software tools, we derived the instrument response and background models required for extracting the diffuse emission in the region. We used existing measurements of the gas distribution in the GC region to derive the underlying distribution of CRs. We present a discussion of the associated biases and limitations of such an approach.
Kokoelmat
- Rinnakkaistallenteet [19207]