Observations of the radio emission field around the γ-ray source 2EG J1834-2138

Free access article

Issue		Astron. Astrophys. Suppl. Ser. Volume 128, Number 3, March II 1998


Page(s)		423 - 428
DOI		http://dx.doi.org/10.1051/aas:1998153

DOI: 10.1051/aas:1998153

A&A Supplement series, Vol. 128, March II 1998, 423-428

Received July 2; accepted August 4, 1997

Observations of the radio emission field around the -ray source 2EG J1834-2138

J.A. Combi and G.E. Romero

Send offprint request: J.A. Combi, first address

Instituto Argentino de Radioastronomıa, C.C.5, (1894) Villa Elisa, Bs. As., Argentina
Theoretical Physics Lab., Department of Physics, University of La Plata, C.C. 67, 1900 La Plata, Argentina
Instituto Astronômico e Geofısico, Universidade de São Paulo, Av. M. Stefano 4200, CEP 043010-904 São Paulo SP, Brazil

Abstract:

We present results of a study of the radio emission field around the best estimate position of the low-latitude EGRET source 2EG . The identification of this -ray source with the gravitational lensed AGN PKS 1830-211 has been recently proposed by Mattox et al. (1997). Additional support for this identification is provided here. Contamination produced by the diffuse disk emission has been removed from new radio images of the surrounding region of 2EG allowing a determination of the fine radio structure. Several previously unnoticed supernova remnants have been found within a few degrees from the -ray source. However, the only strong radio source within the 95% source location confidence contour of 2EG is PKS 1830-211. In addition, both spectrum and variability analysis of the EGRET data support the identification of both sources.

keywords: gamma rays: observations -- radio continuum: galaxies -- galaxies: active -- galaxies: quasars: PKS 1830-211

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