GX 339-4 in a very low luminosity state

Details GX 339-4 in a very low luminosity state GX 339-4 in a very low luminosity state

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003atel..196....1g&link_type=abstract

The Astronomer's Telegram, #196

Astronomy and Astrophysics

Astronomy

11

Radio, X-Ray, Black Holes, Transients

Scientific paper

A 30 ksec Chandra ACIS-S observation on MJD 52911 reveals the black hole X-ray binary GX 339-4 to have entered a very low luminosity state following a more than 2-year-long outburst period (ATEL #85, #95, #107, #120). The X-ray spectrum is well fitted by an absorbed power-law with photon index 2+/-0.2 and absorption column N_H=7+/-1x10e21 cm^-2. The (unabsorbed) 0.4-11 keV flux is of 3.8e-13 erg sec^-1 cm^-2, with a corresponding luminosity of 4.6e31x(d/kpc)^2 erg sec^-1, comparable to the faintest ever measured from GX 339-4.

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