Very Long Baseline Interferometry Observations of the Proposed Radio Counterpart of an EGRET Source. (arXiv:2009.07247v1 [astro-ph.GA])

Very Long Baseline Interferometry Observations of the Proposed Radio Counterpart of an EGRET Source. (arXiv:2009.07247v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Veres_P/0/1/0/all/0/1">Patrik Mil&#xe1;n Veres</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gabanyi_K/0/1/0/all/0/1">Krisztina &#xc9;va Gab&#xe1;nyi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Frey_S/0/1/0/all/0/1">S&#xe1;ndor Frey</a>

We present high-resolution radio interferometric imaging observations of the
radio source NVSS J182659+343113 (hereafter J1826+3431), the proposed radio
counterpart of the ${gamma}$-ray source, 3EG J1824+3441 detected by the
Energetic Gamma Ray Experiment Telescope (EGRET) on board the Compton Gamma Ray
Observatory satellite. We analyzed eight epochs of archival multi-frequency
very long baseline interferometry data. We imaged the asymmetric core-jet
structure of the source, and detected apparent superluminal motion in the jet.
At the highest observing frequency, 15.3 GHz, the core shows high brightness
temperature indicating Doppler boosting. Additionally, the radio features
undergo substantial flux density variability. These findings strengthen the
previous claim of the association of the blazar J1826+3431 with the possible
${gamma}$-ray source, 3EG J1824+3441.

We present high-resolution radio interferometric imaging observations of the
radio source NVSS J182659+343113 (hereafter J1826+3431), the proposed radio
counterpart of the ${gamma}$-ray source, 3EG J1824+3441 detected by the
Energetic Gamma Ray Experiment Telescope (EGRET) on board the Compton Gamma Ray
Observatory satellite. We analyzed eight epochs of archival multi-frequency
very long baseline interferometry data. We imaged the asymmetric core-jet
structure of the source, and detected apparent superluminal motion in the jet.
At the highest observing frequency, 15.3 GHz, the core shows high brightness
temperature indicating Doppler boosting. Additionally, the radio features
undergo substantial flux density variability. These findings strengthen the
previous claim of the association of the blazar J1826+3431 with the possible
${gamma}$-ray source, 3EG J1824+3441.

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