Study of HESS J1857 with HAWC for a Multi-wavelength Analysis

HAWC Collaboration

doi:10.22323/1.501.0867

Study of HESS J1857 with HAWC for a Multi-wavelength Analysis

HAWC Collaboration

Department of Physics

Shanghai Jiao Tong University
Universidad Nacional Autónoma de México
Universidad Autonoma de Chiapas
University of Costa Rica
Universidad Michoacana de San Nicolas de Hidalgo
Michigan State University
Temple University
University of Turin
Instituto Nacional de Astrofisica Optica y Electronica
Polish Academy of Sciences
Universidad de Guadalajara
Max Planck Institute for Nuclear Physics
University of Wisconsin–Madison
Stanford University
Los Alamos National Laboratory
University of Maryland, College Park
Instituto Tecnologico de Estudios Superiores de Monterrey
Michigan Technological University
Sungkyunkwan University
Universidad Politecnica de Pachuca
University of Utah

Research output: Contribution to journal › Conference article › peer-review

Abstract

The High Energy Stereoscopic System (H.E.S.S.) collaboration reported the emission of two extended sources, HESS J1857+027 and HESS J1858+020, separated by ∼ 1^◦, both lacking known counterparts. However, in the 3HWC catalog, the High-Altitude Water Cherenkov (HAWC) collaboration reported the emission of 3HWC J1857+027. We present a multi-source fitting analysis of the HESS J1857 region with ∼2860 days of observations from the HAWC observatory as part of a multi-wavelength study effort to better understand the emission mechanisms of HESS J1857+026. With the improved performance and enriched statistics, we can now resolve the emission from both sources in the region beyond tens of TeV and observe a cutoff in the emission for J1857 for energies beyond ∼30 TeV.

Original language	English
Article number	867
Journal	Proceedings of Science
Volume	501
DOIs	https://doi.org/10.22323/1.501.0867
State	Published - 30 Dec 2025
Event	39th International Cosmic Ray Conference, ICRC 2025 - Geneva, Switzerland Duration: 15 Jul 2025 → 24 Jul 2025

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10.22323/1.501.0867

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@article{d0d5d8ed62e24cb9aaec68c427cbcb39,

title = "Study of HESS J1857 with HAWC for a Multi-wavelength Analysis",

abstract = "The High Energy Stereoscopic System (H.E.S.S.) collaboration reported the emission of two extended sources, HESS J1857+027 and HESS J1858+020, separated by ∼ 1◦, both lacking known counterparts. However, in the 3HWC catalog, the High-Altitude Water Cherenkov (HAWC) collaboration reported the emission of 3HWC J1857+027. We present a multi-source fitting analysis of the HESS J1857 region with ∼2860 days of observations from the HAWC observatory as part of a multi-wavelength study effort to better understand the emission mechanisms of HESS J1857+026. With the improved performance and enriched statistics, we can now resolve the emission from both sources in the region beyond tens of TeV and observe a cutoff in the emission for J1857 for energies beyond ∼30 TeV.",

author = "\{HAWC Collaboration\} and Ramiro Torres-Escobedo and R. Alfaro and C. Alvarez and A. Andr{\'e}s and E. Anita-Rangel and M. Araya and Arteaga-Vel{\'a}zquez, \{J. C.\} and \{Avila Rojas\}, D. and \{Ayala Solares\}, \{H. A.\} and R. Babu and P. Bangale and E. Belmont-Moreno and A. Bernal and Caballero-Mora, \{K. S.\} and T. Capistr{\'a}n and A. Carrami{\~n}ana and F. Carre{\'o}n and S. Casanova and \{Couti{\~n}o de Le{\'o}n\}, S. and \{De la Fuente\}, E. and D. Depaoli and P. Desiati and \{Di Lalla\}, N. and \{Diaz Hernandez\}, R. and Dingus, \{B. L.\} and DuVernois, \{M. A.\} and D{\'i}az-V{\'e}lez, \{J. C.\} and K. Engel and T. Ergin and C. Espinoza and K. Fang and N. Fraija and S. Fraija and Garc{\'i}a-Gonz{\'a}lez, \{J. A.\} and F. Garfias and N. Ghosh and Mu{\~n}oz, \{A. Gonzalez\} and Gonz{\'a}lez, \{M. M.\} and Goodman, \{J. A.\} and S. Groetsch and J. Gyeong and Harding, \{J. P.\} and S. Hern{\'a}ndez-Cadena and I. Herzog and D. Huang and P. H{\"u}ntemeyer and A. Iriarte and S. Kaufmann and D. Kieda and Rho, \{C. D.\}",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s); 39th International Cosmic Ray Conference, ICRC 2025 ; Conference date: 15-07-2025 Through 24-07-2025",

year = "2025",

month = dec,

day = "30",

doi = "10.22323/1.501.0867",

language = "English",

volume = "501",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

}

TY - JOUR

T1 - Study of HESS J1857 with HAWC for a Multi-wavelength Analysis

AU - HAWC Collaboration

AU - Torres-Escobedo, Ramiro

AU - Alfaro, R.

AU - Alvarez, C.

AU - Andrés, A.

AU - Anita-Rangel, E.

AU - Araya, M.

AU - Arteaga-Velázquez, J. C.

AU - Avila Rojas, D.

AU - Ayala Solares, H. A.

AU - Babu, R.

AU - Bangale, P.

AU - Belmont-Moreno, E.

AU - Bernal, A.

AU - Caballero-Mora, K. S.

AU - Capistrán, T.

AU - Carramiñana, A.

AU - Carreón, F.

AU - Casanova, S.

AU - Coutiño de León, S.

AU - De la Fuente, E.

AU - Depaoli, D.

AU - Desiati, P.

AU - Di Lalla, N.

AU - Diaz Hernandez, R.

AU - Dingus, B. L.

AU - DuVernois, M. A.

AU - Díaz-Vélez, J. C.

AU - Engel, K.

AU - Ergin, T.

AU - Espinoza, C.

AU - Fang, K.

AU - Fraija, N.

AU - Fraija, S.

AU - García-González, J. A.

AU - Garfias, F.

AU - Ghosh, N.

AU - Muñoz, A. Gonzalez

AU - González, M. M.

AU - Goodman, J. A.

AU - Groetsch, S.

AU - Gyeong, J.

AU - Harding, J. P.

AU - Hernández-Cadena, S.

AU - Herzog, I.

AU - Huang, D.

AU - Hüntemeyer, P.

AU - Iriarte, A.

AU - Kaufmann, S.

AU - Kieda, D.

AU - Rho, C. D.

PY - 2025/12/30

Y1 - 2025/12/30

N2 - The High Energy Stereoscopic System (H.E.S.S.) collaboration reported the emission of two extended sources, HESS J1857+027 and HESS J1858+020, separated by ∼ 1◦, both lacking known counterparts. However, in the 3HWC catalog, the High-Altitude Water Cherenkov (HAWC) collaboration reported the emission of 3HWC J1857+027. We present a multi-source fitting analysis of the HESS J1857 region with ∼2860 days of observations from the HAWC observatory as part of a multi-wavelength study effort to better understand the emission mechanisms of HESS J1857+026. With the improved performance and enriched statistics, we can now resolve the emission from both sources in the region beyond tens of TeV and observe a cutoff in the emission for J1857 for energies beyond ∼30 TeV.

AB - The High Energy Stereoscopic System (H.E.S.S.) collaboration reported the emission of two extended sources, HESS J1857+027 and HESS J1858+020, separated by ∼ 1◦, both lacking known counterparts. However, in the 3HWC catalog, the High-Altitude Water Cherenkov (HAWC) collaboration reported the emission of 3HWC J1857+027. We present a multi-source fitting analysis of the HESS J1857 region with ∼2860 days of observations from the HAWC observatory as part of a multi-wavelength study effort to better understand the emission mechanisms of HESS J1857+026. With the improved performance and enriched statistics, we can now resolve the emission from both sources in the region beyond tens of TeV and observe a cutoff in the emission for J1857 for energies beyond ∼30 TeV.

UR - https://www.scopus.com/pages/publications/105029022886

U2 - 10.22323/1.501.0867

DO - 10.22323/1.501.0867

M3 - Conference article

AN - SCOPUS:105029022886

SN - 1824-8039

VL - 501

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 867

T2 - 39th International Cosmic Ray Conference, ICRC 2025

Y2 - 15 July 2025 through 24 July 2025

ER -

Study of HESS J1857 with HAWC for a Multi-wavelength Analysis

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