Related papers: HAWC Timing Calibration

Searching for Dark Matter Sub-structure with HAWC

Simulations of dark matter show a discrepancy between the expected number of Galactic dark matter sub-halos and how many have been optically observed. Some of these unseen satellites may exist as dark dwarf galaxies: sub-halos like dwarf…

High Energy Astrophysical Phenomena · Physics 2019-07-24 A. U. Abeysekara , A. Albert , R. Alfaro , C. Alvarez , R. Arceo , J. C. Arteaga-Velázquez , D. Avila Rojas , H. A. Ayala Solares , E. Belmont-Moreno , S. Y. BenZvi , C. Brisbois , K. S. Caballero-Mora , A. Carramiñana , S. Casanova , J. Cotzomi , S. Coutiño de León , C. De León , E. De la Fuente , S. Dichiara , B. L. Dingus , M. A. DuVernois , J. C. Díaz-Vélez , K. Engel , C. Espinoza , H. Fleischhack , N. Fraija , A. Galván-Gámez , J. A. García-González , M. M. González , J. A. Goodman , J. P. Harding , B. Hona , F. Hueyotl-Zahuantitla , P. Hüntemeyer , A. Iriarte , A. Lara , W. H. Lee , H. León Vargas , J. T. Linnemann , A. L. Longinotti , G. Luis-Raya , J. Lundeen , K. Malone , S. S. Marinelli , O. Martinez , I. Martinez-Castellanos , J. Martínez-Castro , J. A. Matthews , P. Miranda-Romagnoli , E. Moreno , M. Mostafá , A. Nayerhoda , L. Nellen , M. Newbold , M. U. Nisa , R. Noriega-Papaqui , E. G. Pérez-Pérez , Z. Ren , C. D. Rho , C. Rivière , D. Rosa-González , M. Rosenberg , H. Salazar , F. Salesa Greus , A. Sandoval , M. Schneider , G. Sinnis , A. J. Smith , R. W. Springer , K. Tollefson , I. Torres , G. Vianello , T. Weisgarber , J. Wood , T. Yapici , A. Zepeda , H. Zhou , J. D. Álvarez

Measurement of the Cherenkov light spectrum and of the polarization with the HEGRA-IACT-system

The HEGRA system of Imaging Atmospheric Cherenkov Telescopes (IACTs) detects Cherenkov light produced by air showers. The concept of stereoscopic observation with the five HEGRA telescopes allows the reconstruction of various shower…

Astrophysics · Physics 2007-05-23 M. Doering , K. Bernloehr , G. Hermann , W. Hofmann , H. Lampeitl

Use of Machine Learning for gamma/hadron separation with HAWC

Background showers triggered by hadrons represent over 99.9% of all particles arriving at ground-based gamma-ray observatories. An important stage in the data analysis of these observatories, therefore, is the removal of hadron-triggered…

High Energy Astrophysical Phenomena · Physics 2022-09-21 T. Capistrán , K. L. Fan , J. T. Linnemann , I. Torres , P. M. Saz Parkinson , P. L. H. Yu

Atmospheric monitoring and array calibration in CTA using the Cherenkov Transparency Coefficient

The Cherenkov Telescope Array (CTA) will be the next generation observatory employing different types of Cherenkov telescopes for the detection of particle showers initiated by very-high-energy gamma rays. A good knowledge of the Earth's…

Instrumentation and Methods for Astrophysics · Physics 2018-01-22 Stanislav Stefanik , Raquel de los Reyes , Dalibor Nosek

HAWC response to atmospheric electricity activity

The HAWC Gamma Ray observatory consists of 300 water Cherenkov detectors (WCD) instrumented with four photo multipliers tubes (PMT) per WCD. HAWC is located between two of the highest mountains in Mexico. The high altitude (4100 m asl), the…

Instrumentation and Methods for Astrophysics · Physics 2019-08-14 Alejandro Lara , Graciela Binimelis de Raga , Olivia Enríquez-Rivera

Calibration of the Cherenkov Telescope Array using Cosmic Ray Electrons

Cosmic ray electrons represent a background for gamma-ray observations with Cherenkov telescopes, initiating air-showers which are difficult to distinguish from photon-initiated showers. This similarity, however, and the presence of cosmic…

High Energy Astrophysical Phenomena · Physics 2016-08-16 R. D. Parsons , J. A. Hinton , H. Schoorlemmer

Optic detectors calibration for measuring ultra-high energy extensive air showers Cherenkov radiation by 532 nm laser

Calibration of a PMT matrix is crucial for the treatment of the data obtained with Cherenkov tracking detector. Furthermore, due to high variability of the aerosol abundance in the atmosphere depending on season, weather etc. A constant…

Instrumentation and Methods for Astrophysics · Physics 2015-09-02 Stanislav Knurenko , Yuri Egorov , Igor Petrov

Design study of an air-Cherenkov telescope for harsh environments with efficient air-shower detection at 100 TeV

Telescopes, designed with semi-conductor based photo sensors, have the potential to detect Cherenkov or fluorescence light emitted by cosmic-rays in the atmosphere. Such telescopes promise a high duty cycle and efficiency in remote harsh…

Instrumentation and Methods for Astrophysics · Physics 2015-11-06 Jan Auffenberg , Thomas Bretz , Lukas Middendorf , Tim Niggemann , Leif Rädel , Merlin Schaufel , Sebastian Schoenen , Johannes Schumacher , Christopher Wiebusch

A general data quality inspection for Gamma-Ray Bursts searches with HAWC

The High Altitude Water Cherenkov (HAWC) is a wide field-of-view gamma-ray observatory sensitive to gamma-rays in the 300 GeV - 100 TeV energy range, located in Mexico at an altitude of 4,100 m above sea level. The detector consists of 300…

High Energy Astrophysical Phenomena · Physics 2017-08-15 Cederik de León , Humberto Salazar , Luis Villaseñor

Calibration of the Sensitivity of Imaging Atmospheric Cherenkov Telescopes using a Reference Light Source

The sensitivity of an Imaging Atmospheric Cherenkov telescope is calibrated by shining, from a distant pulsed monochromatic light source, a defined photon flux onto the mirror. The light pulse is captured and reconstructed by the telescope…

Astrophysics · Physics 2009-10-30 A. Frass , C. Koehler , G. Hermann , M. Hess , W. Hofmann

The HAWC real-time flare monitor for rapid detection of transient events

We present the development of a real-time flare monitor for the High Altitude Water Cherenkov (HAWC) observatory. The flare monitor has been fully operational since 2017 January and is designed to detect very high energy (VHE; $E\gtrsim100$…

High Energy Astrophysical Phenomena · Physics 2017-07-26 A. U. Abeysekara , R. Alfaro , C. Alvarez , J. D. Álvarez , R. Arceo , J. C. Arteaga-Velázquez , D. Avila Rojas , H. A. Ayala Solares , A. S. Barber , N. Bautista-Elivar , J. Becerra Gonzalez , A. Becerril , E. Belmont-Moreno , S. Y. BenZvi , A. Bernal , J. Braun , C. Brisbois , K. S. Caballero-Mora , T. Capistrán , A. Carramiñana , S. Casanova , M. Castillo , U. Cotti , J. Cotzomi , S. Coutiño de León , E. De la Fuente , C. De León , J. C. Díaz-Vélez , B. L. Dingus , M. A. DuVernois , R. W. Ellsworth , K. Engel , D. W. Fiorino , N. Fraija , J. A. García-González , F. Garfias , M. Gerhardt , M. M. González , A. González Muñoz , J. A. Goodman , Z. Hampel-Arias , J. P. Harding , S. Hernandez , A. Hernandez-Almada , B. Hona , C. M. Hui , P. Hüntemeyer , A. Iriarte , A. Jardin-Blicq , V. Joshi , S. Kaufmann , D. Kieda , R. J. Lauer , W. H. Lee , D. Lennarz , H. León Vargas , J. T. Linnemann , A. L. Longinotti , D. López-Cámara , R. López-Coto , G. Luis Raya , R. Luna-García , K. Malone , S. S. Marinelli , O. Martinez , I. Martinez-Castellanos , J. Martínez-Castro , H. Martínez-Huerta , J. A. Matthews , P. Miranda-Romagnoli , E. Moreno , M. Mostafá , L. Nellen , M. Newbold , M. U. Nisa , R. Noriega-Papaqui , R. Pelayo , E. G. Pérez-Pérez , J. Pretz , Z. Ren , C. D. Rho , C. Rivière , D. Rosa-González , M. Rosenberg , E. Ruiz-Velasco , H. Salazar , F. Salesa Greus , A. Sandoval , M. Schneider , H. Schoorlemmer , G. Sinnis , A. J. Smith , R. W. Springer , P. Surajbali , I. Taboada , O. Tibolla , K. Tollefson , I. Torres , T. N. Ukwatta , G. Vianello , T. Weisgarber , S. Westerhoff , I. G. Wisher , J. Wood , T. Yapici , P. W. Younk , A. Zepeda , H. Zhou

Search for very-high-energy gamma-ray counterparts of gravitational waves with HAWC

The High-Altitude Water Cherenkov Observatory (HAWC) is a large field of view (~2 sr) continuously operating experiment sensitive to very-high energy (VHE) gamma rays (~0.3-100 TeV). These characteristics make it well suited for observing…

High Energy Astrophysical Phenomena · Physics 2019-08-20 Israel Martinez-Castellanos

Raman LIDARs for the atmospheric calibration along the line-of-sight of CTA

The Cherenkov Telescope Array (CTA) is the next generation ground based observatory for gamma ray astronomy at very high energies. Employing more than 100 Imaging Atmospheric Cherenkov Telescopes in the northern and southern hemispheres, it…

Instrumentation and Methods for Astrophysics · Physics 2019-09-23 Otger Ballester , Oscar Blanch , Joan Boix , Johan Bregeon , Patrick Brun , Merve Colak , Michele Doro , Vania Da Deppo , Lluis Font , Omar Gabella , Rafael Garcia , Markus Gaug , Camilla Maggio , Manel Martinez , Oscar Martinez , Pere Munar Adrover , Raul Ramos , Stephane Rivoire , Samo Stanic , David Villar , George Vasileiadis , Longlong Wang , Marko Zavrtanik

All-sky sensitivity of HAWC to Gamma-Ray Bursts

The High Altitude Water Cherenkov (HAWC) Observatory is a ground-based TeV gamma-ray observatory in the state of Puebla, Mexico at an altitude of 4100 m. Its 22,000 m$^2$ instrumented area, wide field of view ($\sim$2 sr), and >95% uptime…

High Energy Astrophysical Phenomena · Physics 2019-08-13 Joshua Wood

Detection of TeV Gamma-Rays from extended sources with Milagro

The Milagro gamma-ray observatory employs a water Cherenkov detector to observe extensive air showers produced by high-energy particles impacting in the Earth's atmosphere. A 4800 m$^{2}$ pond instrumented with 723 8" PMTs detects Cherenkov…

Astrophysics · Physics 2019-08-14 P. M. Saz Parkinson

Method and portable bench for tests of the laser optical calibration system components for the Baikal-GVD underwater neutrino Cherenkov telescope

The large-scale deep underwater Cherenkov neutrino telescopes like Baikal-GVD, ANTARES or KM3NeT, require calibration and testing methods of their optical modules. These methods usually include laser-based systems which allow to check the…

Instrumentation and Methods for Astrophysics · Physics 2021-12-22 V. A. Allakhverdyan , A. D. Avrorin , A. V. Avrorin , V. M. Aynutdinov , R. Bannasch , Z. Bardačová , I. A. Belolaptikov , I. V. Borina , V. B. Brudanin , N. M. Budnev , V. Y. Dik , G. V. Domogatsky , A. A. Doroshenko , R. Dvornický , A. N. Dyachok , Zh. -A. M. Dzhilkibaev , E. Eckerová , T. V. Elzhov , L. Fajt f S. V. Fialkovski , A. R. Gafarov , K. V. Golubkov , N. S. Gorshkov , T. I. Gress , M. S. Katulin , K. G. Kebkal , O. G. Kebkal , E. V. Khramov , M. M. Kolbin , K. V. Konischev , K. A. Kopański , A. V. Korobchenko , A. P. Koshechkin , V. A. Kozhin , M. V. Kruglov , M. K. Kryukov , V. F. Kulepov , Pa. Malecki , Y. M. Malyshkin , M. B. Milenin , R. R. Mirgazov , D. V. Naumov , V. Nazari , W. Noga , D. P. Petukhov , E. N. Pliskovsky , M. I. Rozanov , V. D. Rushay , E. V. Ryabov , G. B. Safronov , B. A. Shaybonov , M. D. Shelepov , F. Šimkovic , A. E. Sirenko , A. V. Skurikhin , A. G. Solovjev , M. N. Sorokovikov , I. Štekl , A. P. Stromakov , E. O. Sushenok , O. V. Suvorova , V. A. Tabolenko , B. A. Tarashansky , Y. V. Yablokova , S. A. Yakovlev , D. N. Zaborov

Calibration of the Air Shower Energy Scale of the Water and Air Cherenkov Techniques in the LHAASO experiment

The Wide Field-of-View Cherenkov Telescope Array (WFCTA) and the Water Cherenkov Detector Arrays (WCDA) of LHAASO are designed to work in combination for measuring the energy spectra of various cosmic ray species over a very wide energy…

Instrumentation and Methods for Astrophysics · Physics 2021-09-22 F. Aharonian , Q. An , Axikegu , L. X. Bai , Y. X. Bai , Y. W. Bao , D. Bastieri , X. J. Bi , Y. J. Bi , H. Cai , J. T. Cai , Z. Cao Z. Cao , J. Chang , J. F. Chang , X. C. Chang , B. M. Chen , J. Chen , L. Chen , L. Chen , L. Chen , M. J. Chen , M. L. Chen , Q. H. Chen , S. H. Chen , S. Z. Chen , T. L. Chen , X. L. Chen , Y. Chen , N. Cheng , Y. D. Cheng , S. W. Cui , X. H. Cui , Y. D. Cui , B. Z. Dai , H. L. Dai , Z. G. Dai , Danzengluobu , D. della Volpe , B. DEttorre Piazzoli , X. J. Dong , J. H. Fan , Y. Z. Fan , Z. X. Fan , J. Fang , K. Fang , C. F. Feng , L. Feng , S. H. Feng , Y. L. Feng , B. Gao , C. D. Gao , Q. Gao , W. Gao , M. M. Ge , L. S. Geng , G. H. Gong , Q. B. Gou , M. H. Gu , J. G. Guo , X. L. Guo , Y. Q. Guo , Y. Y. Guo , Y. A. Han , H. H. He , H. N. He , J. C. He , S. L. He , X. B. He , Y. He , M. Heller , Y. K. Hor , C. Hou , X. Hou , H. B. Hu , S. Hu , S. C. Hu , X. J. Hu , D. H. Huang , Q. L. Huang , W. H. Huang , X. T. Huang , Z. C. Huang , F. Ji , X. L. Ji , H. Y. Jia , K. Jiang , Z. J. Jiang , C. Jin , D. Kuleshov , K. Levochkin , B. B. Li , C. Li , C. Li , F. Li , H. B. Li , H. C. Li , H. Y. Li , J. Li , K. Li , W. L. Li , X. Li , X. Li , X. R. Li , Y. Li , Y. Z. Li , Z. Li , Z. Li , E. W. Liang , Y. F. Liang , S. J. Lin , B. Liu , C. Liu , D. Liu , H. Liu , H. D. Liu , J. Liu , J. L. Liu , J. S. Liu , J. Y. Liu , M. Y. Liu , R. Y. Liu , S. M. Liu , W. Liu , Y. N. Liu , Z. X. Liu , W. J. Long , R. Lu , H. K. Lv , B. Q. Ma , L. L. Ma , X. H. Ma , J. R. Mao , A. Masood , W. Mitthumsiri , T. Montaruli , Y. C. Nan , B. Y. Pang , P. Pattarakijwanich , Z. Y. Pei , M. Y. Qi , D. Ruffolo , V. Rulev , A. Saiz , L. Shao , O. Shchegolev , X. D. Sheng , J. R. Shi , H. C. Song , Yu. V. Stenkin , V. Stepanov , Q. N. Sun , X. N. Sun , Z. B. Sun , P. H. T. Tam , Z. B. Tang , W. W. Tian , B. D. Wang , C. Wang , H. Wang , H. G. Wang , J. C. Wang , J. S. Wang , L. P. Wang , L. Y. Wang , R. N. Wang , W. Wang , W. Wang , X. G. Wang , X. J. Wang , X. Y. Wang , Y. D. Wang , Y. J. Wang , Y. P. Wang , Z. Wang , Z. Wang , Z. H. Wang , Z. X. Wang , D. M. Wei , J. J. Wei , Y. J. Wei , T. Wen , C. Y. Wu , H. R. Wu , S. Wu , X. Wu , X. F. Wu , S. Q. Xi , J. Xia , J. J. Xia , G. M. Xiang , G. Xiao , H. B. Xiao , G. G. Xin , Y. L. Xin , Y. Xing , D. L. Xu , R. X. Xu , L. Xue , D. H. Yan , C. W. Yang , F. F. Yang , J. Y. Yang , L. L. Yang , M. J. Yang , R. Z. Yang , S. B. Yang , Y. H. Yao , Z. G. Yao , Y. M. Ye , L. Q. Yin , N. Yin , X. H. You , Z. Y. You , Y. H. Yu , Q. Yuan , H. D. Zeng , T. X. Zeng , W. Zeng , Z. K. Zeng , M. Zha , X. X. Zhai , B. B. Zhang , H. M. Zhang , H. Y. Zhang , J. L. Zhang , J. W. Zhang , L. Zhang , L. Zhang , L. X. Zhang , P. F. Zhang , P. P. Zhang , R. Zhang , S. R. Zhang , S. S. Zhang , X. Zhang , X. P. Zhang , Y. Zhang , Y. Zhang , Y. F. Zhang , Y. L. Zhang , B. Zhao , J. Zhao , L. Zhao , L. Z. Zhao , S. P. Zhao , F. Zheng , Y. Zheng , B. Zhou , H. Zhou , J. N. Zhou , P. Zhou , R. Zhou , X. X. Zhou , C. G. Zhu , F. R. Zhu , H. Zhu , K. J. Zhu , X. Zuo

Recent results from the Milagro TeV gamma-ray observatory

Milagro is a gamma-ray observatory employing a water Cherenkov detector to observe extensive air showers produced by high-energy particles impacting in the Earth's atmosphere. We discuss the first detection of TeV gamma-rays from the…

Astrophysics · Physics 2007-05-23 P. M. Saz Parkinson

Performance of the Stereoscopic System of the HEGRA Imaging Air Cherenkov Telescopes: Monte Carlo Simulations & Observations

Based on the Monte Carlo simulations we have studied the performance of the HEGRA system of imaging air Cherenkov telescopes (IACTs) in its present configuration of 4 IACTs as well as in its future final configuration of 5 IACTs. Here we…

Astrophysics · Physics 2009-10-31 A. Konopelko , M. Hemberger , F. Aharonian

Gamma-ray light curves for the BL Lac Mrk 421 using HAWC data derived with a new approach

The HAWC gamma ray observatory is located at the Sierra Negra Volcano in Puebla, Mexico, at an altitude of 4,100 meters. HAWC is a wide field of view array of 300 water Cherenkov detectors that are continuously surveying 2sr of the sky…

High Energy Astrophysical Phenomena · Physics 2019-08-27 J. A. García-González , M. M. González , N. Fraija