Observation of TeV gamma rays from the Cygnus region with the ARGO-YBJ experiment

6533b837fe1ef96bd12a3263

RESEARCH PRODUCT

Observation of TeV gamma rays from the Cygnus region with the ARGO-YBJ experiment

Carla Bleve Q. Q. Zhu B. S. Wang Zhaxisangzhu Hongbo Hu C. F. Feng B. Bartoli Carlo Vigorito S. M. Mari A. F. Yuan X. D. Sheng Zhengguo Cao Paolo Montini T. Di Girolamo G. Liguori B. D'ettorre Piazzoli R. Iuppa L. L. Ma Haibing Hu Jilong Zhang Y. Q. Guo E. Giroletti Y. B. Chen H. J. Li Chang-chun Ning Zhaoyang Feng H. R. Wu F. Ruggieri Y. Zhang P. Bernardini S. W. Cui D. Martello B. Panico Labaciren Jianli Zhang L. Xue M. Iacovacci M. Zha M. Y. Liu P. R. Shen X. Y. Zhang B. Z. Dai J. K. K. Liu Antonio Budano P. Pistilli H. M. Zhang X. X. Zhou C. Cattaneo H. Y. Jia X. H. Ding Hong-peng Lu Q. Y. Yang Zhaxiciren P. Creti A. K. Calabrese Melcarne P. F. Zhang Cristian Stanescu P. Branchini A. Surdo Roberto Cardarelli Danzengluobu G. Zizzi Q. Huang X. J. Bi G. Marsella Zhenyong Feng F. R. Zhu S. Vernetto C. Liu Bingwei Xu X. X. Li S. Catalanotti Paolo Camarri Z. G. Yao H.h. He M. Dattoli M. Panareo Huaguang Wang Y. H. Tan X. H. Ma Q. B. Gou I. De Mitri J. B. Zhao P. Salvini Fudong Shi A. Pagliaro S. Mastroianni J. Y. Li T. L. Chen I. Bolognino S. Z. Chen Giovanni Mancarella G. Di Sciascio X. C. Yang R. Santonico Irina James L. Perrone F. Galeazzi Longzhou Zhang C. Y. Wu C. Q. Liu G. D'alí Staiti P. Vallania

subject

Astrophysics::High Energy Astrophysical Phenomena general – pulsars: individual (MGRO J2019+37 [Gamma rays]Flux FOS: Physical sciences Astrophysics 01 natural sciences Pulsar wind nebula general – pulsar 0103 physical sciences MILAGRO 010303 astronomy & astrophysics DETECTOR Argo Physics CALIBRATION High Energy Astrophysical Phenomena (astro-ph.HE)010308 nuclear & particles physics MGRO J2031+41)Settore FIS/01 - Fisica Sperimentale Gamma ray Astronomy and Astrophysics individual (MGRO J2019+37 MGRO J2031+41)PLANE 3. Good health Medium energy Crab Nebula gamma ray 13. Climate action Space and Planetary Science GALACTIC SOURCES J2032+4130 Milagro gamma rays; general – pulsars; individual (MGRO J2019+37 MGRO J2031+41)EMISSION Astrophysics - High Energy Astrophysical Phenomena

description

We report the observation of TeV gamma-rays from the Cygnus region using the ARGO-YBJ data collected from 2007 November to 2011 August. Several TeV sources are located in this region including the two bright extended MGRO J2019+37 and MGRO J2031+41. According to the Milagro data set, at 20 TeV MGRO J2019+37 is the most significant source apart from the Crab Nebula. No signal from MGRO J2019+37 is detected by the ARGO-YBJ experiment, and the derived flux upper limits at 90% confidence level for all the events above 600 GeV with medium energy of 3 TeV are lower than the Milagro flux, implying that the source might be variable and hard to be identified as a pulsar wind nebula. The only statistically significant (6.4 standard deviations) gamma-ray signal is found from MGRO J2031+41, with a flux consistent with the measurement by Milagro.

year	journal	country	edition	language
2012-01-10

10.1088/2041-8205/745/2/l22 http://hdl.handle.net/2108/77910