Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008atel.1588....1k&link_type=abstract
The Astronomer's Telegram, #1588
Astronomy and Astrophysics
Astronomy
4
X-Ray, Black Holes, Transients
Scientific paper
Following the discovery of the unusual optical and X-ray flaring activity in GX 339-4 (ATel #1586), we analyzed the two recent Swift XRT observations of the source taken on 2008 June 20 and 24. GX 339-4 is clearly detected in both observations. The first observation is 1985 sec long and the spectrum can be fit with an absorbed power-law model with a hydrogen column density of (4.1+/-1.1)e21 cm^-2 and a photon index of 1.45+/-0.15.
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