The compact radio counterpart of J20187+4041 near the flaring source AGL 2021+4029 and 3EG J2020+4017

PARAGI, Z., TREJO-CRUZ, A., GIACANI, E., DUBNER, G., BYKOV, A., VAN LANGEVELDE, H.

Foca, Izmir (Turquía)

Workshop; 7th Microquasar Workshop: microquasar and beyond; 2008

We present radio results from short e-EVN (EuropeanVLBI network) observations of the counterpart to IGR J20187+4041, a hard X-ray source projected against the gamma Cygni supernova remnant (SNR). The brightest unidentified EGRET source 3EG J2020+4017 is also located in the gamma Cygni region, though its relation to IGR J20187+4041 has not been well established yet. The e-EVN observations were carried out following the AGILE detection of gamma-ray flaring activity in the region. Our observations show that the radio counterpart to the IGR source has a compact structure on the  10 mas scales that could be related to a compact object, but no radio flaring activity has been observed. e-VLBI is a technique which makes it possible to image the structure of radio sources at the highest angular resolution on a very short timescale.