activity
19972020
most citedInsights Into the High-Energy Gamma-ray Emission of Markarian 501 from Extensive Multifrequency Observations in the Fermi Era

239 citations · 2.2k across the 42 of their papers we have counts for

collaborators

39 papers

astro-ph.HE2020★ 40 cited

A decade of multi-wavelength observations of the TeV blazar 1ES 1215+303: Extreme shift of the synchrotron peak frequency and long-term optical-gamma-ray flux increase

Janeth Valverde, Deirdre Horan, Denis Bernard +86

Blazars are known for their variability on a wide range of timescales at all wavelengths. Most studies of TeV gamma-ray blazars focus on short timescales, especially during flares.…

astro-ph.HE2020★ 34 cited

A parsec-scale wobbling jet in the high-synchrotron peaked blazar PG 1553+113

Rocco Lico, J. Liu, M. Giroletti +6

PG 1553+113 is the first blazar showing an approximately two-year quasi-periodic pattern in its gamma-ray light curve. Such quasi-periodicity might have a geometrical origin, possi…

astro-ph.HE2018★ 37 cited

Multi-Epoch VLBA Imaging of Twenty New TeV Blazars: Apparent Jet Speeds

B. Glenn Piner, Philip G. Edwards

We present 88 multi-epoch Very Long Baseline Array (VLBA) images (most at an observing frequency of 8 GHz), of 20 TeV blazars, all of the HBL class, that have not been previously s…

astro-ph.GA2016★ 1 cited

Parsec-scale Structure and Kinematics of Faint TeV HBLs

B. Glenn Piner, Philip G. Edwards

We present new multi-epoch Very Long Baseline Array (VLBA) observations of a set of TeV blazars drawn from our VLBA program to monitor all TeV-detected high-frequency peaked BL Lac…

astro-ph.HE2015

Parsec scale polarization properties of the TeV blazar Markarian 421

R. Lico, M. Giroletti, M. Orienti +15

In this work we present a polarization analysis at radio frequencies of Markarian 421, one of the closest (z=0.03) TeV blazars. The observations were obtained, both in total and in…

astro-ph.HE2014★ 50 cited

First-Epoch VLBA Imaging of Twenty New TeV Blazars

B. Glenn Piner, Philip G. Edwards

We present Very Long Baseline Array (VLBA) images of 20 TeV blazars (HBLs) not previously well-studied on the parsec scale. Observations were made between August and December 2013,…