A CRITICAL ANALYSIS OF THE PROPOSED ASSOCIATIONS BETWEEN GAMMA-RAY SOURCES AND RADIO SUPERNOVA REMNANTS

DUBNER, G.; GIACANI, E.

Kruger Park - Mpumalanga

Workshop; The Cosmic Kaleidoscope: Pulsars and their nebulae, SNRs and more; 2012

The search for multispectral counterparts for high-energy sources is vitalto identify the nature of the powerful emission. Particularly, radiocontinuum observations are very useful since they permit the identificationof very distant extragalactic point-sources, whose radio emission reach usalmost unabsorbed, and for imaging and investigate the spectrum  ofextended emission associated with Galactic sources. Also, atomic andmolecular spectral lines studies allow us to understand the interstellarenvironment and to set constraints to the distance. All this baggage ofinformation has helped in many cases to disclose the origin of theradiation detected by the gamma-ray observatories. Recently Ferrand &Safi-Harb (2012) presented a census of observations of supernova remnants(SNRs) from X-rays to Tev gamma-rays (http://www.physics.umanitoba.ca/snr/SNRcat/) where they summarize theavailable high-energy data and their correlation with radio data. Someidentifications are positive beyond doubt, while in many other cases theassociation with SNRs  is still uncertain. In this contribution we analyzethe quality of the proposed associations aiming at identifying what arethe  radio studies needed to confirm or reject the suggestedidentifications.