Dr. Vikas Joshi
Dr. Vikas Joshi
As a member of HAWC, H.E.S.S., and SWGO collaboration, I am currently involved in the reconstruction and analysis of very-high-energy gamma-ray data. Before coming to ECAP, I did my graduate studies at MPIK Heidelberg.
Presentations
- HAWC High Energy Upgrade with a Sparse Outrigger Array
Contributed poster at the International Cosmic Ray Conference (ICRC) 2017
Publications
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2025
- Alfaro, R., et al. "Study of Long-term Spectral Evolution and X-Ray and γ-Ray Correlation of Blazars Seen by HAWC." Astrophysical Journal 980.1 (2025).
DOI: 10.3847/1538-4357/ad9d3d
BibTeX: Download
2024
- Albert, A., et al. "Precise Measurements of TeV Halos around Geminga and Monogem Pulsars with HAWC." Astrophysical Journal 974.2 (2024).
DOI: 10.3847/1538-4357/ad738e
BibTeX: Download - Albert, A., et al. "TeV Analysis of a Source-rich Region with the HAWC Observatory: Is HESS J1809-193 a Potential Hadronic PeVatron?" Astrophysical Journal 972.1 (2024).
DOI: 10.3847/1538-4357/ad59a6
BibTeX: Download - Albert, A., et al. "Search for decaying dark matter in the Virgo cluster of galaxies with HAWC." Physical Review D 109.4 (2024).
DOI: 10.1103/PhysRevD.109.043034
BibTeX: Download - Alfaro, R., et al. "Galactic Gamma-Ray Diffuse Emission at TeV Energies with HAWC Data." Astrophysical Journal 961.1 (2024).
DOI: 10.3847/1538-4357/ad00b6
BibTeX: Download - Alfaro, R., et al. "Ultra-high-energy gamma-ray bubble around microquasar V4641 Sgr." Nature 634.8034 (2024): 557-560.
DOI: 10.1038/s41586-024-07995-9
BibTeX: Download - Alvarado, A., et al. "Cosmic-ray energy reconstruction using machine learning techniques." Proceedings of the 38th International Cosmic Ray Conference, ICRC 2023, Nagoya, JPN Sissa Medialab Srl, 2024.
BibTeX: Download - Andrés, A., et al. "Constraining the TeV Halo Population in M31." Proceedings of the 38th International Cosmic Ray Conference, ICRC 2023, Nagoya, JPN Sissa Medialab Srl, 2024.
BibTeX: Download - Glombitza, Jonas, et al. "Application of graph networks to γ/hadron separation in IACT image analyses." Proceedings of the 38th International Cosmic Ray Conference, ICRC 2023, Nagoya, JPN Sissa Medialab Srl, 2024.
BibTeX: Download - Mostafá, Miguel, et al. "Recent results from the High Altitude Water Cherenkov Observatory." Proceedings of the 38th International Cosmic Ray Conference, ICRC 2023, Nagoya, JPN Sissa Medialab Srl, 2024.
BibTeX: Download
2023
- Abeysekara, A. U., et al. "The High-Altitude Water Cherenkov (HAWC) observatory in México: The primary detector." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 1052 (2023).
DOI: 10.1016/j.nima.2023.168253
BibTeX: Download - Aharonian, F., et al. "Detection of extended γ -ray emission around the Geminga pulsar with H.E.S.S." Astronomy & Astrophysics 673 (2023).
DOI: 10.1051/0004-6361/202245776
BibTeX: Download - Aharonian, F., et al. "HESS J1809-193: A halo of escaped electrons around a pulsar wind nebula?" Astronomy & Astrophysics 672 (2023).
DOI: 10.1051/0004-6361/202245459
BibTeX: Download - Aharonian, F., et al. "Constraints on the Intergalactic Magnetic Field Using Fermi-LAT and H.E.S.S. Blazar Observations." Astrophysical Journal Letters 950.2 (2023): L16.
DOI: 10.3847/2041-8213/acd777
BibTeX: Download - Albert, A., et al. "Detailed Analysis of the TeV γ-Ray Sources 3HWC J1928+178, 3HWC J1930+188, and the New Source HAWC J1932+192." Astrophysical Journal 942.2 (2023).
DOI: 10.3847/1538-4357/ac8de3
BibTeX: Download - Albert, A., et al. "Discovery of Gamma Rays from the Quiescent Sun with HAWC." Physical Review Letters 131.5 (2023).
DOI: 10.1103/PhysRevLett.131.051201
BibTeX: Download - Albert, A., et al. "An optimized search for dark matter in the galactic halo with HAWC." Journal of Cosmology and Astroparticle Physics 2023.12 (2023).
DOI: 10.1088/1475-7516/2023/12/038
BibTeX: Download - Albert, A., et al. "HAWC Detection of a TeV Halo Candidate Surrounding a Radio-quiet Pulsar." Astrophysical Journal Letters 944.2 (2023).
DOI: 10.3847/2041-8213/acb5ee
BibTeX: Download - Albert, A., et al. "HAWC Study of the Very-high-energy γ-Ray Spectrum of HAWC J1844−034." Astrophysical Journal 954.2 (2023).
DOI: 10.3847/1538-4357/ace967
BibTeX: Download - Alfaro, Ruben, et al. "High-altitude characterization of the Hunga pressure wave with cosmic rays by the HAWC observatory." Advances in Space Research (2023).
DOI: 10.1016/j.asr.2023.09.049
BibTeX: Download - Alfaro, R., et al. "Searching for TeV Dark Matter in Irregular Dwarf Galaxies with HAWC Observatory." Astrophysical Journal 945.1 (2023).
DOI: 10.3847/1538-4357/acb5f1
BibTeX: Download - Glombitza, Jonas, et al. "Application of graph networks to background rejection in Imaging Air Cherenkov Telescopes." Journal of Cosmology and Astroparticle Physics 2023.11 (2023).
DOI: 10.1088/1475-7516/2023/11/008
BibTeX: Download
2022
- Abeysekara, A. U., et al. "Study of the eHWC J1825-134 Region at Highest Energies with HWAC." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin, DEU Sissa Medialab Srl, 2022.
BibTeX: Download - Abeysekara, A. U., et al. "A GeV to TeV view of shell-type SNRs." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin, DEU Sissa Medialab Srl, 2022.
BibTeX: Download - Abeysekara, A. U., et al. "A search for spectral hardening in HAWC sources above 56 TeV." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin, DEU Sissa Medialab Srl, 2022.
BibTeX: Download - Abeysekara, A. U., et al. "Characterizing γ-ray sources with HAL (HAWC Accelerated Likelihood) and 3ML." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin, DEU Sissa Medialab Srl, 2022.
BibTeX: Download - Abeysekara, A. U., et al. "Limits on Diffuse Dark Matter with HAWC." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin, DEU Sissa Medialab Srl, 2022.
BibTeX: Download - Abeysekara, A. U., et al. "Limits on the Diffuse Gamma-Ray Background with HAWC." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin, DEU Sissa Medialab Srl, 2022.
BibTeX: Download - Abeysekara, A. U., et al. "Particle Acceleration in the Cygnus Superbubble." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin, DEU Sissa Medialab Srl, 2022.
BibTeX: Download - Abeysekara, A. U., et al. "Spectral and Energy Morphology Analysis Study of HAWC J2031+415." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin, DEU Sissa Medialab Srl, 2022.
BibTeX: Download - Abeysekara, A. U., et al. "Study of the morphology of the region surrounding eHWC J1850+001." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin, DEU Sissa Medialab Srl, 2022.
BibTeX: Download - Abeysekara, A. U., et al. "The Ultra-High-Energy Source MGRO J1908+06." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin, DEU Sissa Medialab Srl, 2022.
BibTeX: Download - Abeysekara, A. U., et al. "The gamma-ray emission from 3HWC J1928+178." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin, DEU Sissa Medialab Srl, 2022.
BibTeX: Download - Aharonian, F., et al. "A deep spectromorphological study of the γ -ray emission surrounding the young massive stellar cluster Westerlund 1." Astronomy & Astrophysics 666 (2022).
DOI: 10.1051/0004-6361/202244323
BibTeX: Download - Aharonian, F., et al. "Evidence for γ-ray emission from the remnant of Kepleras supernova based on deep H.E.S.S. observations." Astronomy & Astrophysics 662 (2022).
DOI: 10.1051/0004-6361/202243096
BibTeX: Download - Albert, Andrea, et al. "Searching for >177 TeV Gamma Rays in the Vicinity of Mrk 501 with HAWC." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Berlin Sissa Medialab Srl, 2022.
BibTeX: Download - Albert, A., et al. "HAWC Study of the Ultra-high-energy Spectrum of MGRO J1908+06." Astrophysical Journal 928.2 (2022).
DOI: 10.3847/1538-4357/ac56e5
BibTeX: Download - Albert, A., et al. "Long-term Spectra of the Blazars Mrk 421 and Mrk 501 at TeV Energies Seen by HAWC." Astrophysical Journal 929.2 (2022).
DOI: 10.3847/1538-4357/ac58f6
BibTeX: Download - Albert, A., et al. "Cosmic ray spectrum of protons plus helium nuclei between 6 and 158 TeV from HAWC data." Physical Review D 105.6 (2022).
DOI: 10.1103/PhysRevD.105.063021
BibTeX: Download - Albert, A., et al. "Probing the Extragalactic Mid-infrared Background with HAWC." Astrophysical Journal 933.2 (2022).
DOI: 10.3847/1538-4357/ac7714
BibTeX: Download - Albert, A., et al. "γ-Ray Emission from Classical Nova V392 Per: Measurements from Fermi and HAWC." Astrophysical Journal 940.2 (2022).
DOI: 10.3847/1538-4357/ac966a
BibTeX: Download - Alfaro, R., et al. "Study of the Very High Energy Emission of M87 through its Broadband Spectral Energy Distribution." Astrophysical Journal 934.2 (2022).
DOI: 10.3847/1538-4357/ac7b78
BibTeX: Download - Alfaro, R., et al. "Gamma/hadron separation with the HAWC observatory." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 1039 (2022).
DOI: 10.1016/j.nima.2022.166984
BibTeX: Download - Breuhaus, M., et al. "Galactic gamma-ray and neutrino emission from interacting cosmic-ray nuclei." Astronomy & Astrophysics 661 (2022).
DOI: 10.1051/0004-6361/202141318
BibTeX: Download - Chibueze, J. O., et al. "A MeerKAT, e-MERLIN, HESS, and Swift search for persistent and transient emission associated with three localized FRBs." Monthly Notices of the Royal Astronomical Society 515.1 (2022): 1365-1379.
DOI: 10.1093/mnras/stac1601
BibTeX: Download - Grasso, D., et al. "Galactic Gamma-Ray Diffuse Emission at TeV energies with HAWC Data." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin, DEU Sissa Medialab Srl, 2022.
BibTeX: Download - Hwang, Se Yeon, et al. "Studying High-Mass Microquasars with HAWC." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin, DEU Sissa Medialab Srl, 2022.
BibTeX: Download - Lara, Alejandro, et al. "Galactic Cosmic Ray increase associated with an interplanetary magnetic cloud observed by HAWC." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual Sissa Medialab Srl, 2022.
BibTeX: Download - Olivera-Nieto, Laura, et al. "Standardized Formats for Gamma-Ray Analysis Applied to HAWC Observatory Data." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin, DEU Sissa Medialab Srl, 2022.
BibTeX: Download - Un Nisa, Mehr, et al. "Search for TeV decaying dark matter from the Virgo cluster of galaxies." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin, DEU Sissa Medialab Srl, 2022.
BibTeX: Download - Ureña-Mena, Fernando, et al. "Modeling the non-flaring VHE emission from M87 as detected by the HAWC gamma ray observatory." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin, DEU Sissa Medialab Srl, 2022.
BibTeX: Download
2021
- Abdalla, H., et al. "Search for Dark Matter Annihilation Signals from Unidentified Fermi-LAT Objects with HESS." Astrophysical Journal 918.1 (2021).
DOI: 10.3847/1538-4357/abff59
BibTeX: Download - Abeysekara, A. U., et al. "HAWC observations of the acceleration of very-high-energy cosmic rays in the Cygnus Cocoon." Nature Astronomy (2021).
DOI: 10.1038/s41550-021-01318-y
BibTeX: Download - Albert, A., et al. "Evidence that Ultra-high-energy Gamma Rays Are a Universal Feature near Powerful Pulsars." Astrophysical Journal Letters 911.2 (2021).
DOI: 10.3847/2041-8213/abf4dc
BibTeX: Download - Albert, A., et al. "Probing the Sea of Cosmic Rays by Measuring Gamma-Ray Emission from Passive Giant Molecular Clouds with HAWC." Astrophysical Journal 914.2 (2021).
DOI: 10.3847/1538-4357/abfc47
BibTeX: Download - Albert, A., et al. "HAWC Search for High-mass Microquasars." Astrophysical Journal Letters 912.1 (2021).
DOI: 10.3847/2041-8213/abf35a
BibTeX: Download - Albert, A., et al. "Spectrum and morphology of the very-high-energy source HAWC J2019+368." Astrophysical Journal 911.2 (2021).
DOI: 10.3847/1538-4357/abecda
BibTeX: Download - Albert, A., et al. "Evidence of 200 TeV photons from HAWC J1825-134." Astrophysical Journal Letters 907.2 (2021).
DOI: 10.3847/2041-8213/abd77b
BibTeX: Download - Albert, A., et al. "A Survey of Active Galaxies at TeV Photon Energies with the HAWC Gamma-Ray Observatory." Astrophysical Journal 907.2 (2021).
DOI: 10.3847/1538-4357/abca9a
BibTeX: Download - Alvarez, C., et al. "HAWC as a Ground-Based Space-Weather Observatory." Solar Physics 296.6 (2021).
DOI: 10.1007/s11207-021-01827-z
BibTeX: Download - Solares, H. A.Ayala, et al. "Multimessenger gamma-ray and neutrino coincidence alerts using hawc and icecube subthreshold data." Astrophysical Journal 906.1 (2021).
DOI: 10.3847/1538-4357/abcaa4
BibTeX: Download - Taylor, Andrew M., et al. "Revealing x-ray and gamma ray temporal and spectral similarities in the GRB 190829A afterglow." Science 372.6546 (2021): 1081-1085.
DOI: 10.1126/science.abe8560
BibTeX: Download
2020
- Abdalla, H., et al. "Very high energy gamma-ray emission from two blazars of unknown redshift and upper limits on their distance." Monthly Notices of the Royal Astronomical Society 494.4 (2020): 5590-5602.
DOI: 10.1093/mnras/staa999
BibTeX: Download - Abdalla, H., et al. "Detection of very-high-energy γ -ray emission from the colliding wind binary η Car with H.E.S.S." Astronomy & Astrophysics 635 (2020).
DOI: 10.1051/0004-6361/201936761
BibTeX: Download - Akiyama, S., et al. "Interplanetary Magnetic Flux Rope Observed at Ground Level by HAWC." Astrophysical Journal 905.1 (2020).
DOI: 10.3847/1538-4357/abc344
BibTeX: Download - Albert, A., et al. "HAWC and Fermi-LAT Detection of Extended Emission from the Unidentified Source 2HWC J2006+341." Astrophysical Journal Letters 903.1 (2020).
DOI: 10.3847/2041-8213/abbfae
BibTeX: Download - Albert, A., et al. "HAWC J2227+610 and Its Association with G106.3+2.7, a New Potential Galactic PeVatron." Astrophysical Journal Letters 896.2 (2020).
DOI: 10.3847/2041-8213/ab96cc
BibTeX: Download - Albert, A., et al. "Constraints on Lorentz Invariance Violation from HAWC Observations of Gamma Rays above 100 TeV." Physical Review Letters 124.13 (2020).
DOI: 10.1103/PhysRevLett.124.131101
BibTeX: Download - Albert, A., et al. "3HWC: The Third HAWC Catalog of Very-high-energy Gamma-Ray Sources." Astrophysical Journal 905.1 (2020).
DOI: 10.3847/1538-4357/abc2d8
BibTeX: Download - Albert, A., et al. "Search for gamma-ray spectral lines from dark matter annihilation in dwarf galaxies with the High-Altitude Water Cherenkov observatory." Physical Review D 101.10 (2020).
DOI: 10.1103/PhysRevD.101.103001
BibTeX: Download - Albert, A., et al. "Constraining the local burst rate density of primordial black holes with HAWC." Journal of Cosmology and Astroparticle Physics 2020.4 (2020).
DOI: 10.1088/1475-7516/2020/04/026
BibTeX: Download - Albert, A., et al. "Multiple Galactic Sources with Emission Above 56 TeV Detected by HAWC." Physical Review Letters 124.2 (2020).
DOI: 10.1103/PhysRevLett.124.021102
BibTeX: Download - Giacinti, G., et al. "Halo fraction in TeV-bright pulsar wind nebulae." Astronomy & Astrophysics 636 (2020).
DOI: 10.1051/0004-6361/201936505
BibTeX: Download
2019
- Brisbois, Chad, and Vikas Joshi. "Electron spectrum of the dragonfly pulsar wind nebula from X-ray to TeV." Proceedings of the 36th International Cosmic Ray Conference, ICRC 2019, Madison, WI Sissa Medialab Srl, 2019.
BibTeX: Download - Joshi, Vikas, and Harm Schoorlemmer. "Air shower reconstruction using HAWC and the Outrigger array." Proceedings of the 36th International Cosmic Ray Conference, ICRC 2019, Madison, WI Sissa Medialab Srl, 2019.
BibTeX: Download