2002/10/17 by P. Kaaret, S. Corbel, J. A. Tomsick +8 · 4 citations
Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Astrophysics and Cosmic Phenomena #Black hole (networking) #Flux (metallurgy) #Full width at half maximum #Jet (fluid) #Neutron star #Optics #Physics #Pulsars and Gravitational Waves Research #X-ray #X-ray transient #astro-ph
paper · pdf · doi:10.1086/344540
published as Astrophys.J.582:945-953,2003 · accepted for publication in ApJ, 11 pages, several figures in color
arxiv created 2002/10/17 · openalex publication_date 2003/01/10 · arxiv updated 2009/12/01 · openalex created_date 2020/11/23 · openalex updated_date 2026/08/05
We report on X-ray observations of the large-scale jets recently discovered in the radio and detected in X-rays from the black hole candidate X-ray transient and microquasar XTE J1550-564. On 2002 March 11, X-ray emission was detected 23'' to the west of the black hole candidate and was extended along the jet axis with an FWHM of 1 2 and a full width at 10% of maximum intensity of 5''. The morphology of the X-ray emission matched well to that of the radio emission at the same epoch. The jet moved by 0 52 ± 0 13 between 2002 March 11 and June 19. The apparent speed during that interval was 5.2 ± 1.3 mas day -1 . This is significantly less than the average apparent speed of 18.1 ± 0.4 mas day -1 from 1998 to 2002, assuming that the jet was ejected in 1998 September, and indicates that the jet has decelerated. The X-ray spectrum is adequately described by a power law with a photon index near 1.8 subject to interstellar absorption. The unabsorbed X-ray flux was 3.4 × 10 -13 ergs cm -2 s -1 in the 0.3-8 keV band in 2002 March and decreased to 2.9 × 10 -13 ergs cm -2 s -1 in June. We also detect X-rays from the eastern jet in 2002 March and show that it has decelerated and dimmed since the previous detections in 2000.