Follow-up radio and X-ray observations of 4U1630-47

Astronomy and Astrophysics – Astronomy

Scientific paper

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Radio, X-Ray, Binaries, Black Holes, Transients

Scientific paper

Observations with the Australia Telescope Compact Array of the black hole binary 4U1630-47, performed on December 21, 25, 27 and 29, failed to detect a radio counterpart to the outbursting X-ray source (ATEL #675) on any of the four dates. Measured rms noise levels are respectively 0.12, 0.10, 0.26, 0.25 mJy at 4.8 GHz and a factor about two lower at 8.6 GHz. When the 4 data sets are added together, this results in a 3 sigma upper limit of 0.14 mJy at 8.6 GHz and 0.30 mJy at 4.8 GHz.

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