A recent Swift/XRT observation of GX 339-4 during its faint optical flux

Details A recent Swift/XRT observation of GX 339-4 during its faint optical flux A recent Swift/XRT observation of GX 339-4 during its faint optical flux

Nov 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atel.2281....1y&link_type=abstract

The Astronomer's Telegram, #2281

Astronomy and Astrophysics

Astronomy

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

Scientific paper

We report on the X-ray luminosity of the black hole X-ray binary GX 339-4, which was reported to fade in the optical and reach its lowest optical flux since the start of its 2006-7 outburst (ATels #968, #1027, #2270). A Swift XRT observation in PC mode was performed on 2009-10-30.35 UT with an exposure of 2984 seconds. The source appeared to be weak with about 25 net counts in the 0.3-10 keV band; it is substantially fainter than previous XRT observations in March 2009.

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