Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-08-30
Astrophys.J. 618 (2004) L45-L48
Astronomy and Astrophysics
Astrophysics
5 pages, color figures, uses emulateapj.cls and apjfonts.sty, submitted to ApJ Letters
Scientific paper
10.1086/427626
We present an analysis of a Chandra observation of the field surrounding the low-mass X-ray binary 4U 1755-33, which has been in quiescence since 1996. In 2003, Angelini and White reported the appearance of a narrow 7 arcmin long jetlike feature centered on the position of 4U 1755-33 using the XMM-Newton telescope. Though the source and jet are not visibly apparent in our Chandra/ACIS-S image, there is a significant excess (4-6 sigma) of counts in a region that encloses the jet when compared to adjacent regions. We examined a knot of emission in the jet that was detected by XMM-Newton but not by Chandra and calculated that if the knot flux observed by XMM-Newton was concentrated in a point source, Chandra would have easily detected it; we therefore conclude that this knot of emission is diffuse. In summary, we suggest that the jetlike feature found previously in the XMM-Newton data is quite diffuse and likely a true jet, and is not due to a chance alignment of discrete point sources or point-like regions of emission associated with internal shocks.
McClintock Jeffrey E.
Miller John Mcl.
Murray Stephen S.
Park Shinae Q.
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