Other
Scientific paper
Mar 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003head....7.1720a&link_type=abstract
American Astronomical Society, HEAD meeting #7, #17.20; Bulletin of the American Astronomical Society, Vol. 35, p.627
Other
Scientific paper
We report an XMM-Newton observation of the Low mass X-ray Binary (LMXB) and black hole candidate 4U1755-33. This source had been a bright persistent source for at least 25 yrs, but in 1995 entered an extended quiescent phase. 4U1755-33 was not detected with an upper limit to the 2--10 keV luminosity of 5 X 1031d4kpc2 ergs s-1 (where d4kpc is the distance in units of 4 kpc) -- consistent with the luminosity of other black hole candidates in a quiescent state. An unexpected result is the discovery of a narrow 7 arc min long X-ray jet centered on the position of 4U1755-33. The spectrum of the jet is similar to that of jets observed from other galactic and extragalactic sources, and may have been ejected from 4U1755-33 when it was bright. Jets are a feature of accreting black holes, and the detection of a fossil jet provides additional evidence supporting the black hole candidacy of 4U1755-33. The spectral properties of three bright serendipitous sources in the field are reported and it is suggested these are background active galactic nuclei sources.
Angelini Leonardo
White Nicholas E.
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