TeV emission of Galactic plane sources with HAWC and H.E.S.S
Abstract
The High Altitude Water Cherenkov (HAWC) observatory and the High Energy Stereoscopic System (H.E.S.S.) are two leading instruments in the ground-based very-high-energy gamma-ray domain. HAWC employs the water Cherenkov detection (WCD) technique, while H.E.S.S. is an array of Imaging Atmospheric Cherenkov Telescopes (IACTs). The two facilities therefore differ in multiple aspects, including their observation strategy, the size of their field of view and their angular resolution, leading to different analysis approaches. Until now, it has been unclear if the results of observations by both types of instruments are consistent: several of the recently discovered HAWC sources have been followed up by IACTs, resulting in a confirmed detection only in a minority of cases. With this paper, we go further and try to resolve the tensions between previous results by performing a new analysis of the H.E.S.S. Galactic plane survey data, applying an analysis technique comparable between H.E.S.S. and HAWC. Events above 1 TeV are selected for both datasets, the point spread function of H.E.S.S. is broadened to approach that of HAWC, and a similar background estimation method is used. This is the first detailed comparison of the Galactic plane observed by both instruments. H.E.S.S. can confirm the gamma-ray emission of four HAWC sources among seven previously undetected by IACTs, while the three others have measured fluxes below the sensitivity of the H.E.S.S. dataset. Remaining differences in the overall gamma-ray flux can be explained by the systematic uncertainties. Therefore, we confirm a consistent view of the gamma-ray sky between WCD and IACT techniques.
Keywords
Cite
@article{arxiv.2107.01425,
title = {TeV emission of Galactic plane sources with HAWC and H.E.S.S},
author = {H. Abdalla and F. Aharonian and F. Ait Benkhali and E. O. Angüner and C. Arcaro and C. Armand and T. Armstrong and H. Ashkar and M. Backes and V. Baghmanyan and V. Barbosa Martins and A. Barnacka and M. Barnard and Y. Becherini and D. Berge and K. Bernlöhr and B. Bi and M. Böttcher and C. Boisson and J. Bolmont and M. de Bony de Lavergne and M. Breuhaus and R. Brose and F. Brun and P. Brun and M. Bryan and M. Büchele and T. Bulik and T. Bylund and S. Caroff and A. Carosi and T. Chand and S. Chandra and A. Chen and G. Cotter and M. Curyło and J. Damascene Mbarubucyeye and I. D. Davids and J. Davies and C. Deil and J. Devin and L. Dirson and A. Djannati-Ataï and A. Dmytriiev and A. Donath and V. Doroshenko and L. Dreyer and C. Duffy and J. Dyks and K. Egberts and F. Eichhorn and S. Einecke and G. Emery and J. -P. Ernenwein and K. Feijen and S. Fegan and A. Fiasson and G. Fichet de Clairfontaine and G. Fontaine and S. Funk and M. Füßling and S. Gabici and Y. A. Gallant and G. Giavitto and L. Giunti and D. Glawion and J. F. Glicenstein and D. Gottschall and M. -H. Grondin and J. Hahn and M. Haupt and G. Hermann and J. A. Hinton and W. Hofmann and C. Hoischen and T. L. Holch and M. Holler and M. Hörbe and D. Horns and D. Huber and M. Jamrozy and D. Jankowsky and F. Jankowsky and I. Jung-Richardt and E. Kasai and M. A. Kastendieck and K. Katarzyński and U. Katz and D. Khangulyan and B. Khélifi and S. Klepser and W. Kluźniak and Nu. Komin and R. Konno and K. Kosack and D. Kostunin and M. Kreter and G. Lamanna and A. Lemière and M. Lemoine-Goumard and J. -P. Lenain and F. Leuschner and C. Levy and T. Lohse and I. Lypova and J. Mackey and J. Majumdar and D. Malyshev and D. Malyshev and V. Marandon and P. Marchegiani and A. Marcowith and A. Mares and G. Martí-Devesa and R. Marx and G. Maurin and P. J. Meintjes and M. Meyer and A. M. W. Mitchell and R. Moderski and L. Mohrmann and A. Montanari and C. Moore and P. Morris and E. Moulin and J. Muller and T. Murach and K. Nakashima and A. Nayerhoda and M. de Naurois and H. Ndiyavala and J. Niemiec and L. Oakes and P. O Brien and H. Odaka and S. Ohm and L. Olivera-Nieto and E. de Ona Wilhelmi and M. Ostrowski and S. Panny and M. Panter and R. D. Parsons and G. Peron and B. Peyaud and Q. Piel and S. Pita and V. Poireau and A. Priyana Noel and D. A. Prokhorov and H. Prokoph and G. Pühlhofer and M. Punch and A. Quirrenbach and S. Raab and R. Rauth and P. Reichherzer and A. Reimer and O. Reimer and Q. Remy and M. Renaud and F. Rieger and L. Rinchiuso and C. Romoli and G. Rowell and B. Rudak and V. Sahakian and S. Sailer and H. Salzmann and D. A. Sanchez and A. Santangelo and M. Sasaki and J. Schäfer and F. Schüssler and H. M. Schutte and U. Schwanke and M. Seglar-Arroyo and M. Senniappan and A. S. Seyffert and N. Shafi and J. N. S. Shapopi and K. Shiningayamwe and R. Simoni and A. Sinha and H. Sol and A. Specovius and S. Spencer and M. Spir-Jacob and Ł. Stawarz and L. Sun and R. Steenkamp and C. Stegmann and S. Steinmassl and C. Steppa and T. Takahashi and T. Tavernier and A. M. Taylor and R. Terrier and J. H. E. Thiersen and D. Tiziani and M. Tluczykont and L. Tomankova and C. Trichard and M. Tsirou and R. Tuffs and Y. Uchiyama and D. J. van der Walt and C. van Eldik and C. van Rensburg and B. van Soelen and G. Vasileiadis and J. Veh and C. Venter and P. Vincent and J. Vink and H. J. Völk and Z. Wadiasingh and S. J. Wagner and J. Watson and F. Werner and R. White and A. Wierzcholska and Yu Wun Wong and A. Yusafzai and M. Zacharias and R. Zanin and D. Zargaryan and A. A. Zdziarski and A. Zech and S. J. Zhu and A. Zmija and J. Zorn and S. Zouari and N. Żywucka and A. Albert and R. Alfaro and C. Alvarez and J. C. Arteaga-Velázquez and K. P. Arunbabu and D. Avila Rojas and V. Baghmanyan and E. Belmont-Moreno and S. Y. BenZvi and C. Brisbois and K. S. Caballero-Mora and T. Capistrán and A. Carramiñana and S. Casanova and U. Cotti and J. Cotzomi and S. Coutiño de León and E. De la Fuente and C. de León and R. Diaz Hernandez and J. C. Díaz-Vélez and B. L. Dingus and M. A. DuVernois and M. Durocher and R. W. Ellsworth and K. Engel and C. Espinoza and K. L. Fan and M. Fernández Alonso and N. Fraija and A. Galván-Gámez and D. Garcia and J. A. García-González and F. Garfias and G. Giacinti and M. M. González and J. A. Goodman and J. P. Harding and S. Hernandez and B. Hona and D. Huang and F. Hueyotl-Zahuantitla and P. Hüntemeyer and A. Iriarte and A. Jardin-Blicq and V. Joshi and D. Kieda and W. H. Lee and H. León Vargas and J. T. Linnemann and A. L. Longinotti and G. Luis-Raya and R. López-Coto and K. Malone and O. Martinez and I. Martinez-Castellanos and J. Martínez-Castro and J. A. Matthews and P. Miranda-Romagnoli and J. A. Morales-Soto and E. Moreno and M. Mostafá and A. Nayerhoda and L. Nellen and M. Newbold and M. U. Nisa and R. Noriega-Papaqui and N. Omodei and A. Peisker and Y. Pérez Araujo and E. G. Pérez-Pérez and C. D. Rho and D. Rosa-González and E. Ruiz-Velasco and F. Salesa Greus and A. Sandoval and M. Schneider and H. Schoorlemmer and J. Serna-Franco and A. J. Smith and R. W. Springer and P. Surajbali and K. Tollefson and I. Torres and R. Torres-Escobedo and R. Turner and F. Ureña-Mena and L. Villaseñor and T. Weisgarber and E. Willox and H. Zhou},
journal= {arXiv preprint arXiv:2107.01425},
year = {2021}
}