Strong radio flare in XTE J1746-322 = IGR J17464-3213

Astronomy and Astrophysics – Astronomy

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Radio, X-Ray, Gamma Ray, Request For Observations, Binaries, Black Holes, Transients

Scientific paper

We report a strong radio flare from the X-ray transient and black hole candidate XTE J1746-322 = IGR J17464-3213 (ATEL #132; ATEL #133) = H1743-322 (ATEL #136; ATEL #138; IAUC 8105). Observations with the Very Large Array (VLA) on April 6 and 8 2003 show the source increased in flux density by almost a factor 5 at 4.9 GHz, from 20.1+/-0.3 to 96+/-2 mJy. The radio spectrum also steepened from roughly flat on April 6, to sharply falling with frequency on April 8.

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