Spectrum and Morphology of the Very-High-Energy Source HAWC J2019+368

TL;DR

This paper presents a detailed analysis of the very-high-energy gamma-ray source HAWC J2019+368, resolving it into two sources, and studies its morphology and spectrum, linking it to a pulsar and nebula system.

Contribution

It provides the first detailed morphological and spectral analysis of HAWC J2019+368, associating it with a pulsar and nebula, and resolving the region into two sources.

Findings

Resolved the region into two sources: HAWC J2019+368 and J2016+371.

Associated HAWC J2019+368 with PSR J2021+3651 and its nebula.

Modeled the spectrum revealing a 7 kyr pulsar and nebula system.

Abstract

The MGRO J2019+37 region is one of the brightest sources in the sky at TeV energies. It was detected in the 2 year HAWC catalog as 2HWC J2019+367 and here we present a detailed study of this region using data from HAWC. This analysis resolves the region into two sources: HAWC J2019+368 and HAWC J2016+371. We associate HAWC J2016+371 with the evolved supernova remnant CTB 87, although its low significance in this analysis prevents a detailed study at this time. An investigation of the morphology (including possible energy dependent morphology) and spectrum for HAWC J2019+368 is the focus of this work. We associate HAWC J2019+368 with PSR J2021+3651 and its X-ray pulsar wind nebula, the Dragonfly nebula. Modeling the spectrum measured by HAWC and Suzaku reveals a $\sim$7 kyr pulsar and nebula system producing the observed emission at X-ray and ${\gamma}$-ray energies.