A NICER view of a highly absorbed flare in GRS 1915+ 105

J Neilsen, J Homan, JF Steiner, G Marcel… - The Astrophysical …, 2020 - iopscience.iop.org
After 26 yr in outburst, the black hole X-ray binary GRS 1915+ 105 dimmed considerably in
early 2018; its flux dropped sharply in mid-2019, and it has remained faint ever since. This …

Self-consistent Black Hole Accretion Spectral Models and the Forgotten Role of Coronal Comptonization of Reflection Emission

JF Steiner, JA García, W Eikmann… - The Astrophysical …, 2017 - iopscience.iop.org
Continuum and reflection spectral models have each been widely employed in measuring
the spins of accreting black holes. However, the two approaches have not been …

Reflection Spectroscopy of the Black Hole Binary XTE J1752− 223 in Its Long-stable Hard State

JA García, JF Steiner, V Grinberg… - The Astrophysical …, 2018 - iopscience.iop.org
We present a detailed spectral analysis of the black hole binary XTE J1752− 223 in the hard
state of its 2009 outburst. Regular monitoring of this source by the Rossi X-ray Timing …

Insight-HXMT Study of the Inner Accretion Disk in the Black Hole Candidate EXO 1846–031

XQ Ren, Y Wang, SN Zhang, R Soria… - The Astrophysical …, 2022 - iopscience.iop.org
We study the spectral evolution of the black hole candidate EXO 1846− 031 during its 2019
outburst, in the 1–150 keV band, with the Hard X-ray Modulation Telescope. The continuum …

[HTML][HTML] ALMA/NICER observations of GRS 1915+ 105 indicate a return to a hard state

KII Koljonen, T Hovatta - Astronomy & Astrophysics, 2021 - aanda.org
Context. GRS 1915+ 105 is a transient black hole X-ray binary consistently emitting 10–
100% of the Eddington luminosity in the X-ray band over the last three decades until mid …

Stronger reflection from black hole accretion disks in soft X-ray states

JF Steiner, RA Remillard, JA García… - The Astrophysical …, 2016 - iopscience.iop.org
ABSTRACT We analyze 15,000 spectra of 29 stellar-mass black hole (BH) candidates
collected over the 16 year mission lifetime of Rossi X-ray Timing Explorer using a simple …

A 'high-hard'outburst of the black hole X-ray binary GS 1354− 64

KII Koljonen, DM Russell… - Monthly Notices of …, 2016 - academic.oup.com
We study in detail the evolution of the 2015 outburst of GS 1354− 64 (BW Cir) at optical, UV
and X-ray wavelengths using Faulkes Telescope South/Las Cumbres Observatory Global …

Spectral analysis of χ class data of GRS 1915+ 105 using TCAF solution

A Banerjee, A Bhattacharjee, D Debnath… - … in Astronomy and …, 2020 - iopscience.iop.org
The class variable source GRS 1915+ 105 exhibits a wide range of time variabilities on
timescales of a few seconds to a few days. Depending on the count rates in different energy …

Comparing X-ray color selection in separating X-ray binary classes using Color-Color-Intensity diagrams

N Islam, SD Vrtilek, B Boroson, DW Kim, E O'Sullivan… - New Astronomy, 2021 - Elsevier
X-ray binaries exhibit a wide range of properties but there are few accepted methods to
determine the nature of the compact object. Color-Color-Intensity diagrams have been …