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

¹ Instituto Argentino de Radioastronomía, C.C.5, (1894) Villa Elisa, Bs. As., Argentina
² Theoretical Physics Lab., Department of Physics, University of La Plata, C.C. 67, 1900 La Plata, Argentina
³ Instituto Astronômico e Geofísico, Universidade de São Paulo, Av. M. Stefano 4200, CEP 043010-904 São Paulo SP, Brazil

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

Received: 2 July 1997
Accepted: 4 August 1997

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 γ-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 γ-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.