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MOST Observations of GX 339-4

ATel #1960; Dick Hunstead (Sydney), Duncan Campbell-Wilson (Sydney), Tom Maccarone (Southampton), Piergiorgio Casella (Amsterdam), Diana Hannikainen (Metsahovi Observatory)
on 11 Mar 2009; 07:17 UT
Credential Certification: Tom Maccarone (tjm@phys.soton.ac.uk)

Subjects: Radio, Request for Observations, Binary, Black Hole, Transient

Referred to by ATel #: 1962, 2270

We observed GX 339-4 with the Molonglo Observatory Synthesis Telescope (MOST) on March 6. A detection was made, at a flux of 3.5 +- 1 mJy. The Swift BAT measurement, taken from the BAT team's web page (http://heasarc.gsfc.nasa.gov/docs/swift/results/transients/weak/GX339-4.lc.txt) indicates a soft gamma-ray count rate of 0.015 cts/sec/cm^2. This combination of radio and gamma-ray flux is consistent with the correlations found in previous measurements of GX 339-4 (e.g. Hannikainen et al. 1998, A&A, 337, 460; Corbel et al. 2000, A&A, 359, 251). Additional MOST observations are likely to take place this upcoming weekend. We encourage further observations at all wavelengths.