@Article{StecchiniDAmJabCasBra:2020:CoSpIn,
author = "Stecchini, Paulo Eduardo Freire and D'Amico, Fl{\'a}vio and
Jablonski, Francisco Jos{\'e} and Castro, M. and Braga,
Jo{\~a}o",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Universidade Estadual de Campinas
(UNICAMP)} and {Instituto Nacional de Pesquisas Espaciais
(INPE)}",
title = "Broadband X-ray analysis of 1E1740.7-2942: constraints on spin,
inclination, and a tentative black hole mass",
journal = "Monthly Notices of the Royal Astronomical Society",
year = "2020",
volume = "493",
number = "2",
pages = "2694--2705",
month = "Apr.",
keywords = "accretion, accretion discs, black hole physics, X-rays: binaries,
X-rays: individual: 1E 1740.7, 2942.",
abstract = "1E 1740.7-2942 is one of the strongest hard X-ray emitters in the
Galactic Centre region, believed to be a black hole in a high-mass
X-ray binary system. Although extensively studied in X-rays, many
aspects about the underlying nature of the system are still
unknown. For example, X-ray data analyses of 1E1740.7-2942 to date
have not yet unveiled the signature of a reflection component,
whose modelling could be used to estimate parameters such as the
spin of the black hole and inclination of the disc. We report here
on the determination of these parameters from the analysis of the
reflection component present in a public NuSTAR observation which
has not been subject to any previous study. We include XMM-Newton
and INTEGRAL data to build a combined spectrum, enabling a joint
analysis of both the disc and comptonization components. Results
point to a relatively high inclination disc greater than or
similar to 50 degrees (3 a) and a near-maximum speed rotating
black hole. The former is in agreement with a previous radio study
and the latter is reported here for the first time. Lastly, we
follow the methodology of recent efforts to weigh black holes with
only X-ray spectra and find results that suggest a black hole mass
of about 5 M-circle dot for 1E 1740.7-2942.",
doi = "10.1093/mnras/staa417",
url = "http://dx.doi.org/10.1093/mnras/staa417",
issn = "0035-8711 and 1365-2966",
language = "en",
targetfile = "stecchini_broadband.pdf",
urlaccessdate = "28 abr. 2024"
}