The gravitational lens J1131-1231 - How to avoid missing an opportunity

Details The gravitational lens J1131-1231 - How to avoid missing an opportunity The gravitational lens J1131-1231 - How to avoid missing an opportunity

2008-11-20

arxiv.org/abs/0811.3421v1

Astronomy and Astrophysics

Astrophysics

3 pages. Proceedings of the "9th EVN Symposium on The role of VLBI in the Golden Age for Radio Astronomy", see http://pos.si

Scientific paper

So far the lens J1131-1231 has been studied only at optical and X-ray wavelengths. A detection in the radio was almost missed as a result of an incorrect position and archive problems. A direct analysis of NVSS uv data - in contrast to the catalogue or images alone - provided sufficient evidence of a detection to justify further radio investigations. The system was subsequently observed with MERLIN and the EVN in e-VLBI mode. Even though MERLIN seems to show the lensed star-forming regions and the compact cores, a preliminary analysis of the EVN data only shows an AGN in the lens itself but not the lensed cores. Additional VLA observations will be carried out soon.

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