activity
19972026
most citedA Multi-wavelength View of the TeV Blazar Markarian 421: Correlated Variability, Flaring, and Spectral Evolution

223 citations · 2k across the 64 of their papers we have counts for

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Showing 2025Show all

9 papers · 1 filter

astro-ph.HE2025★ 1 cited

Prompt Searches for Very-High-Energy γ-Ray Counterparts to IceCube Astrophysical Neutrino Alerts

J. Abhir, A. Biland, K. Brand +817

The search for sources of high-energy astrophysical neutrinos can be significantly advanced through a multi-messenger approach, which seeks to detect the gamma rays that accompany…

astro-ph.HE2025

Probing a cosmogenic origin of astrophysical neutrinos and cosmic rays using gamma-ray observations of TXS 0506+056

A. Acharyya, A. Archer, P. Bangale +58

In September 2017, a high-energy neutrino event detected by the IceCube Neutrino Observatory (IceCube-170922A) was associated, at the level, with a gamma-ray flare from the bl…

astro-ph.HE2025★ 3 cited

Constraints on Axion-Like Particles from VERITAS Observations of a Flaring Radio Galaxy in the Perseus Cluster

C. B. Adams, A. Archer, P. Bangale +62

Background: Axion-like particles (ALPs) are hypothetical particles that emerge in numerous theoretical extensions to the Standard Model. Their coupling to electromagnetic field imp…

astro-ph.HE2025

HAWC, VERITAS, Fermi-LAT and XMM-Newton follow-up observations of the unidentified ultra-high-energy gamma-ray source LHAASO J2108+5157

The VERITAS collaboration, C. B. Adams, P. Bangale +142

We report observations of the ultra-high-energy gamma-ray source LHAASO J21085157, utilizing VERITAS, HAWC, Fermi-LAT, and XMM-Newton. VERITAS has collected 40 hours of d…

astro-ph.HE2025

Multi-wavelength Study of HESS J0632+057: New Insights into Pulsar-Disk Interaction

Jaegeun Park, Hongjun An, Chanho Kim +60

We present an analysis of new multi-wavelength observations of the TeV gamma-ray binary HESS J0632+057, conducted using SALT, Swift, NuSTAR, and VERITAS in 2023--2024. By combining…

astro-ph.HE2025

Multiwavelength observation of a candidate pulsar halo LHAASO J0621+3755 and the first X-ray detection of PSR J0622+3749

C. B. Adams, A. Archer, P. Bangale +71

Pulsar halos are regions around middle-aged pulsars extending out to tens of parsecs. The large extent of the halos and well-defined central cosmic-ray accelerators make this new c…