A radio galaxy as possible counterpart of IGR J21247+5058

Details A radio galaxy as possible counterpart of IGR J21247+5058 A radio galaxy as possible counterpart of IGR J21247+5058

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004atel..235....1r&link_type=abstract

The Astronomer's Telegram, #235

Other

14

Radio, Infra-Red, Optical, X-Ray, Gamma Ray, Agn, Binaries, Black Holes, Quasars

Scientific paper

Within the 2 arcmin-radius position error circle of the recently discovered INTEGRAL source IGR J21247+5058 (ATEL #229) is located the core of the bright radio source 4C 50.55 (also known as GPSR 93.319+0.394, KR2, NRAO 659 or BG 2122+50, among other names). The core has a flat radio spectrum with a peak flux density of 237 mJy/beam at 1.4 GHz. It is at the center of an elongated structure of 10 x 3 arcmin that ends in two large radio lobes that have peak flux densities of 288 mJy/beam (NW) and 92 mJy/beam (SE), and spectral indexes alpha~-0.6 (where S_nu is proportional to nu^+alpha), compatible with optically thin synchrotron radiation (see NVSS contour plot).

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