ATCA radio observations of GX 339-4
ATel #1007; S. Corbel (CEA Saclay & Univ Paris 7), T. Tzioumis (ATNF), C. Brocksopp (MSSL) and R. Fender (Univ Southampton).
on 20 Feb 2007; 11:10 UT
Distributed as an Instant Email Notice Transients
Credential Certification: S. CORBEL (corbel@discovery.saclay.cea.fr)
Subjects: Radio, Request for Observations, Black Hole, Transient
Referred to by ATel #: 1058
Following the recent reactivation of GX 339-4 in X-rays as detected by
INTEGRAL (see ATel #1000), we have conducted several radio observations
with the Australia Telescope Compact Array (ATCA) located in Narrabri,
Australia.
We report the results of the observations (at 3.5 and 6 cm) covering the
period from February 4 to February 18. GX 339-4 has been detected in all
radio observations and is very variable on timescale of days with flux
density ranging from 1 to 25 mJy.
The spectral shape also changes over time ranging from flat to very steep
spectrum, likely suggesting that GX 339-4 is currently undergoing a series
of plasma ejection events (similar to the oscillations a la GRS 1915+105).
