@Article{DAmicoHeRoPeGrPeTo:2001:DeHaXr,
author = "D'Amico, Fl{\'a}vio and Heindl, W. A. and Rothschild, R. E. and
Peterson, L. E. and Gruber, D. E. and Pelling, M. and Tomsick, J.
A.",
title = "HEXTE studies of SCO X-1 spectra: detections of hard X-ray tails
beyond 200 Kev",
journal = "Advances in Space Research",
year = "2001",
volume = "28",
number = "2-3",
pages = "389--394",
keywords = "ASTROF{\'{\I}}SICA, espectro raio X, estrela de neutron,
binarias raio X, buracos negros, X ray spectra, neutron stars, X
ray binaries, black holes.",
abstract = "Using the HEXTE experiment on-board the RXTE satellite, we
performed a search for hard X-ray tails in Sco X-1 spectra. We
found strong evidence for the presence of such a non-thermal
component on several occasions. Using the PCAIRXTE we were able to
track the position of the source along the Z diagram, and we
observed that the presence of the hard X-ray tail is not confined
to a particular region. However, we found a correlation between
the power law index of the non-thermal component and the position
of the source in the Z diagram, suggesting that the hard X-ray
spectrum (i.e., E > 50 keV)becomes flatter as the mass accretion
rate increases. We were also able to study the temporal variation
of the appearance/absence of the hard X-ray component. With our
derived luminosities, we were also able to test the idea that
X-ray luminosities can be used to distinguish between X-ray binary
systems containing neutron stars and black holes.",
issn = "0273-1177",
label = "9618",
language = "en",
targetfile = "1-s2.0-S0273117701004367-main.pdf",
urlaccessdate = "2024, May 18"
}