Increased radio and optical activity in GX 339-4

Details Increased radio and optical activity in GX 339-4 Increased radio and optical activity in GX 339-4

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004atel..230....1b&link_type=abstract

The Astronomer's Telegram, #230

Astronomy and Astrophysics

Astronomy

10

Radio, Optical, Binaries, Black Holes, Transients

Scientific paper

Recent optical and radio observations of the black hole X-ray binary jet source GX 339-4 reveal it to be in a brighter optical and radio state since observations were last made in 2003. On UT 2004 Feb 05.34, observations made with the 1.3m CTIO telescope using ANDICAM yielded V=17.7, compared to UT 2003 Oct 27.00 when V=19.5. Radio observations with the Australia Telescope Compact Array measure a flux density at 8.2 GHz of ~0.6 mJy on 2004 Feb 4/5, compared to an upper limit of <0.1 mJy on 2003 Dec 22 (see also ATEL #196).

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