The HI absorption distance of HESS J1943+213 favours its extragalactic nature

Abstract

The H.E.S.S. collaboration (Abramowski et al. 2011) dicovered a new TeV point-like source HESS J1943+213 in the Galactic plane and suggested three possible low-energy-band counterparts: a $\gamma$-ray binary, a pulsar wind nebula (PWN), or a BL Lacertae object. We measure the distance to the radio counterpart G57.76-1.29 of HESS J1943+213. We analyze Very Large Array observations to obtain a reliable HI absorption spectrum.The resulting distance limit is $\ge$ 16 kpc. This distance strongly supports that HESS J1943+213 is an extragalactic source, consistent with the preferred counterpart of the HESS collaboration.

3 figures, 2 pages, A&A accepted

References in corpus (6)

• The VLA Galactic Plane Survey
• Discovery of the radio and X-ray counterpart of TeV Gamma-ray source HESS J1731-347
• The Distance of the SNR Kes 75 and PWN PSR J1846-0258 System
• Radio and X-ray images of SNR G18.8+0.3 interacting with molecular clouds
• HESS J1943+213: a candidate extreme BL Lacertae object
• Chandra observation of the TeV source HESS J1834-087

Cited by in corpus (5)

• Extreme Blazars Studied with Fermi-LAT and Suzaku: 1ES 0347-121 and Blazar Candidate HESS J1943+213
• The host galaxy and Fermi-LAT counterpart of HESS J1943+213
• VLBI search for the radio counterpart of HESS J1943+213
• EVN Observations of HESS J1943+213: Evidence for an Extreme TeV BL Lac Object
• HESS J1943+213: a non-classical high-frequency-peaked BL Lac object