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Center for Astrophysics Harvard & Smithsonian: Cambridge, Massachusetts, US

2019-04-01 to present | Astrophysicist (Smithsonian Astrophysical Observatory)
Employment
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James Steiner

Works (50 of 202)

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Page 1 of 5

Dimming GRS 1915+105 observed with NICER and Insight–HXMT

Astronomy & Astrophysics
2025-02 | Journal article
Contributors: M. Zhou; V. Grinberg; A. Santangelo; C. Bambi; Q. Bu; C. M. Diez; L. Kong; J. F. Steiner; Y. Tuo
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Crossref

Characterizing the Broadband Reflection Spectrum of MAXI J1803-298 during Its 2021 Outburst with NuSTAR and NICER

The Astrophysical Journal
2024-12-01 | Journal article
Contributors: Oluwashina K. Adegoke; Javier A. García; Riley M. T. Connors; Yuanze Ding; Guglielmo Mastroserio; James F. Steiner; Adam Ingram; Fiona A. Harrison; John A. Tomsick; Erin Kara et al.
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Crossref

Connecting the X-Ray/UV Variability of Fairall 9 with NICER: A Possible Warm Corona

The Astrophysical Journal
2024-12-01 | Journal article
Contributors: Ethan R. Partington; Edward M. Cackett; Rick Edelson; Keith Horne; Jonathan Gelbord; Erin Kara; Christian Malacaria; Jake A. Miller; James F. Steiner; Andrea Sanna
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Crossref

Evaluation of Several Explanations of the Strong X-Ray Polarization of the Black Hole X-Ray Binary 4U 1630-47

The Astrophysical Journal Letters
2024-12-01 | Journal article
Contributors: Henric Krawczynski; Yajie Yuan; Alexander Y. Chen; Kun Hu; Nicole Rodriguez Cavero; Sohee Chun; Ephraim Gau; James F. Steiner; Michal Dovčiak
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Crossref

Self-consistent Disk-reflection Analysis of the Black Hole Candidate X-Ray Binary MAXI J1813−095 with NICER, Swift, Chandra, and NuSTAR

The Astrophysical Journal
2024-11-01 | Journal article
Contributors: Santiago Ubach; James F. Steiner; Jiachen Jiang; Javier García; Riley M. T. Connors; Guglielmo Mastroserio; Ye Feng; John A. Tomsick
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Crossref

IXPE View of BH XRBs during the First 2.5 Years of the Mission

Galaxies
2024-09-25 | Journal article
Contributors: Michal Dovčiak; Jakub Podgorný; Jiří Svoboda; James F. Steiner; Philip Kaaret; Henric Krawczynski; Adam Ingram; Vadim Kravtsov; Lorenzo Marra; Fabio Muleri et al.
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Crossref
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Impact of reflection Comptonization on x-ray reflection spectroscopy: The case of EXO 1846-031

Physical Review D
2024-08-13 | Journal article
Contributors: Songcheng Li; Honghui Liu; Cosimo Bambi; James F. Steiner; Zuobin Zhang
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Crossref

Long term variability of Cygnus X-1

Astronomy & Astrophysics
2024-07 | Journal article
Contributors: Ole König; Guglielmo Mastroserio; Thomas Dauser; Mariano Méndez; Jingyi Wang; Javier A. García; James F. Steiner; Katja Pottschmidt; Ralf Ballhausen; Riley M. Connors et al.
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Crossref

An IXPE-led X-Ray Spectropolarimetric Campaign on the Soft State of Cygnus X-1: X-Ray Polarimetric Evidence for Strong Gravitational Lensing

The Astrophysical Journal Letters
2024-07-01 | Journal article
Contributors: James F. Steiner; Edward Nathan; Kun Hu; Henric Krawczynski; Michal Dovčiak; Alexandra Veledina; Fabio Muleri; Jiri Svoboda; Kevin Alabarta; Maxime Parra et al.
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Crossref

Dramatic Drop in the X-Ray Polarization of Swift J1727.8–1613 in the Soft Spectral State

The Astrophysical Journal Letters
2024-05-01 | Journal article
Contributors: Jiří Svoboda; Michal Dovčiak; James F. Steiner; Philip Kaaret; Jakub Podgorný; Juri Poutanen; Alexandra Veledina; Fabio Muleri; Roberto Taverna; Henric Krawczynski et al.
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Crossref

The First High-contrast Images of Near High-mass X-Ray Binaries with Keck/NIRC2

The Astrophysical Journal
2024-05-01 | Journal article
Contributors: M. Prasow-Émond; J. Hlavacek-Larrondo; K. Fogarty; É. Artigau; D. Mawet; P. Gandhi; J. F. Steiner; J. Rameau; D. Lafrenière; A. Fabian et al.
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Crossref

Discovery of a variable energy-dependent X-ray polarization in the accreting neutron star GX 5−1

Astronomy & Astrophysics
2024-04 | Journal article
Contributors: Sergio Fabiani; Fiamma Capitanio; Rosario Iaria; Juri Poutanen; Andrea Gnarini; Francesco Ursini; Ruben Farinelli; Anna Bobrikova; James F. Steiner; Jiri Svoboda et al.
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Crossref

IXPE observation confirms a high spin in the accreting black hole 4U 1957+115

Astronomy & Astrophysics
2024-04 | Journal article
Contributors: L. Marra; M. Brigitte; N. Rodriguez Cavero; S. Chun; J. F. Steiner; M. Dovčiak; M. Nowak; S. Bianchi; F. Capitanio; A. Ingram et al.
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Crossref

Highly Coherent Quasiperiodic Oscillations in the “Heartbeat” Black Hole X-Ray Binary IGR J17091–3624

The Astrophysical Journal
2024-03-01 | Journal article
Contributors: Jingyi Wang; Erin Kara; Jeroen Homan; James F. Steiner; Diego Altamirano; Tomaso Belloni; Michiel van der Klis; Adam Ingram; Javier A. García; Guglielmo Mastroserio et al.
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Crossref

The 2022 Outburst of IGR J17091–3624: Connecting the Exotic GRS 1915+105 to Standard Black Hole X-Ray Binaries

The Astrophysical Journal
2024-03-01 | Journal article
Contributors: Jingyi Wang; Erin Kara; Javier A. García; Diego Altamirano; Tomaso Belloni; James F. Steiner; Michiel van der Klis; Adam Ingram; Guglielmo Mastroserio; Riley Connors et al.
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Crossref

X-Ray Polarization of the Black Hole X-Ray Binary 4U 1630–47 Challenges the Standard Thin Accretion Disk Scenario

The Astrophysical Journal
2024-03-01 | Journal article
Contributors: Ajay Ratheesh; Michal Dovčiak; Henric Krawczynski; Jakub Podgorný; Lorenzo Marra; Alexandra Veledina; Valery F. Suleimanov; Nicole Rodriguez Cavero; James F. Steiner; Jiří Svoboda et al.
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Crossref

A possible third body in the X-ray system GRS 1747−312 and models with higher order multiplicity

Monthly Notices of the Royal Astronomical Society
2024-02-27 | Journal article
Contributors: Caleb Painter; Rosanne Di Stefano; Vinay L Kashyap; Roberto Soria; Jose Lopez-Miralles; Ryan Urquhart; James F Steiner; Sara Motta; Darin Ragozzine; Hideyuki Mori
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Crossref

First X-Ray Polarization Measurement Confirms the Low Black Hole Spin in LMC X-3

The Astrophysical Journal
2024-01-01 | Journal article
Contributors: Jiří Svoboda; Michal Dovčiak; James F. Steiner; Fabio Muleri; Adam Ingram; Anastasiya Yilmaz; Nicole Rodriguez Cavero; Lorenzo Marra; Juri Poutanen; Alexandra Veledina et al.
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Crossref

The first X-ray polarimetric observation of the black hole binary LMC X-1

Monthly Notices of the Royal Astronomical Society
2023-12 | Journal article
Contributors: Podgorný, J.; Marra, L.; Muleri, F.; Rodriguez Cavero, N.; Ratheesh, A.; Dovčiak, M.; Mikušincová, R.; Brigitte, M.; Steiner, J. F.; Veledina, A. et al.
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NASA Astrophysics Data System

The First X-Ray Polarization Observation of the Black Hole X-Ray Binary 4U 1630–47 in the Steep Power-law State

The Astrophysical Journal Letters
2023-11-01 | Journal article
Contributors: Nicole Rodriguez Cavero; Lorenzo Marra; Henric Krawczynski; Michal Dovčiak; Stefano Bianchi; James F. Steiner; Jiri Svoboda; Fiamma Capitanio; Giorgio Matt; Michela Negro et al.
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Crossref

A Possible Third Body in the X-Ray System GRS 1747-312 and Models with Higher-Order Multiplicity

arXiv e-prints
2023-10 | Working paper
Contributors: Painter, Caleb; Di Stefano, Rosanne; Kashyap, Vinay L.; Soria, Roberto; Lopez-Miralles, Jose; Urquhart, Ryan; Steiner, James F.; Motta, Sara; Ragozzine, Darin; Mori, Hideyuki
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NASA Astrophysics Data System

Discovery of a variable energy-dependent X-ray polarization in the accreting neutron star GX 5-1

arXiv e-prints
2023-10 | Working paper
Contributors: Fabiani, Sergio; Capitanio, Fiamma; Iaria, Rosario; Poutanen, Juri; Gnarini, Andrea; Ursini, Francesco; Farinelli, Ruben; Bobrikova, Anna; Steiner, James F.; Svoboda, Jiri et al.
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NASA Astrophysics Data System

Galaxy formation with Wave/Fuzzy Dark Matter: The core-halo structure

arXiv e-prints
2023-10 | Working paper
Contributors: Pozo, Alvaro; Emami, Razieh; Mocz, Philip; Broadhurst, Tom; Hernquist, Lars; Vogelsberger, Mark; Smith, Randall; Tremblay, Grant; Narayan, Ramesh; Steiner, James et al.
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NASA Astrophysics Data System

IXPE observation confirms a high spin value in the accreting black hole 4U 1957+115

arXiv e-prints
2023-10 | Working paper
Contributors: Marra, L.; Brigitte, M.; Rodriguez Cavero, N.; Chun, S.; Steiner, J. F.; Dovčiak, M.; Nowak, M.; Bianchi, S.; Capitanio, F.; Ingram, A. et al.
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NASA Astrophysics Data System

NICER timing results indicate a state transition in Swift J1727.8-1613

The Astronomer's Telegram
2023-10 | Research tool
Contributors: Bollemeijer, Niek; Uttley, Phil; Buisson, Douglas; Homan, Jeroen; Altamirano, Diego; Steiner, James F.; Gendreau, Keith C.; Arzoumanian, Zaven; Strohmayer, Tod E.; Sanna, A.
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NASA Astrophysics Data System

Probing extreme black-hole outflows on short timescales via high spectral-resolution X-ray imagers

arXiv e-prints
2023-10 | Working paper
Contributors: Pinto, Ciro; Steiner, James F.; Bodaghee, Arash; Chakraborty, Priyanka; Sobolewska, Malgosia; Pasham, Dheeraj R.; Ogorzalek, Anna; Zuhone, John; Bogdan, Akos; Vogelsberger, Mark
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NASA Astrophysics Data System

QPOML: a machine learning approach to detect and characterize quasi-periodic oscillations in X-ray binaries

Monthly Notices of the Royal Astronomical Society
2023-10 | Journal article
Contributors: Kiker, Thaddaeus J.; Steiner, James F.; Garraffo, Cecilia; Méndez, Mariano; Zhang, Liang
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NASA Astrophysics Data System

Rapid Spectral Parameter Prediction for Black Hole X-Ray Binaries using Physicalised Autoencoders

arXiv e-prints
2023-10 | Working paper
Contributors: Tregidga, Ethan; Steiner, James; Garraffo, Cecilia; Rhea, Carter; Aubin, Mayeul
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NASA Astrophysics Data System

A NICER Interactive Archive Explorer

AAS/High Energy Astrophysics Division
2023-09 | Conference abstract
Contributors: Steiner, James F.; Tregidga, Ethan; Ubach, Santiago; Garraffo, Cecilia
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NASA Astrophysics Data System

Discovery of X-ray Polarization from the Black Hole Transient Swift J1727.8-1613

arXiv e-prints
2023-09 | Working paper
Contributors: Veledina, Alexandra; Muleri, Fabio; Dovciak, Michal; Poutanen, Juri; Ratheesh, Ajay; Capitanio, Fiamma; Matt, Giorgio; Soffitta, Paolo; Tennant, Allyn F.; Negro, Michela et al.
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NASA Astrophysics Data System

First X-ray polarization measurement confirms the low black-hole spin in LMC X-3

arXiv e-prints
2023-09 | Working paper
Contributors: Svoboda, Jiří; Dovčiak, Michal; Steiner, James F.; Muleri, Fabio; Ingram, Adam; Yilmaz, Anastasiya; Rodriguez Cavero, Nicole; Marra, Lorenzo; Poutanen, Juri; Veledina, Alexandra et al.
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NASA Astrophysics Data System

Measuring Black Hole Spins through X-ray Reflection Spectroscopy and the Relativistic Precession Model: the case of XTE J1859+226

arXiv e-prints
2023-09 | Working paper
Contributors: Mall, Gitika; Liu, Honghui; Bambi, Cosimo; Steiner, James F.; Garcia, Javier A.
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NASA Astrophysics Data System

The RS Oph Outburst of 2021 Monitored in X-Rays with NICER

The Astrophysical Journal
2023-09 | Journal article
Contributors: Orio, Marina; Gendreau, Keith; Giese, Morgan; Luna, Gerardo Juan M.; Magdolen, Jozef; Strohmayer, Tod E.; Zhang, Andy E.; Altamirano, Diego; Dobrotka, Andrej; Enoto, Teruaki et al.
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NASA Astrophysics Data System

The EB Correlation in Resolved Polarized Images: Connections to the Astrophysics of Black Holes

The Astrophysical Journal
2023-09-01 | Journal article
Contributors: Razieh Emami; Sheperd S. Doeleman; Maciek Wielgus; Dominic Chang; Koushik Chatterjee; Randall Smith; Matthew Liska; James F. Steiner; Angelo Ricarte; Ramesh Narayan et al.
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Crossref

Mapping the X-ray variability of GRS 1915 + 105 with machine learning

Monthly Notices of the Royal Astronomical Society
2023-08 | Journal article
Contributors: Ricketts, Benjamin J.; Steiner, James F.; Garraffo, Cecilia; Remillard, Ronald A.; Huppenkothen, Daniela
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NASA Astrophysics Data System

Preliminary spectral fitting and QPO evolution in NICER observations of black hole candidate Swift J1727.8-1613

The Astronomer's Telegram
2023-08 | Research tool
Contributors: Draghis, Paul A.; Miller, Jon M.; Homan, Jeroen; Uttley, Phil; Bollemeijer, Niek; Steiner, James F.; Hare, Jeremy; Tombesi, Francesco; Gendreau, Keith C.; Arzoumanian, Zaven et al.
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NASA Astrophysics Data System

The impact of electron anisotropy on the polarization of the X-ray emission from black hole accretion disks and implications for the black hole X-ray binary 4U 1630-47

arXiv e-prints
2023-07 | Working paper
Contributors: Krawczynski, Henric; Yuan, Yajie; Chen, Alexander Y.; Rodriguez Cavero, Nicole; Hu, Kun; Gau, Ephraim; Steiner, James F.; Dovčiak, Michal
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NASA Astrophysics Data System

High-density Reflection Spectroscopy of Black Hole X-Ray Binaries in the Hard State

The Astrophysical Journal
2023-07-01 | Journal article
Contributors: Honghui Liu; Jiachen Jiang; Zuobin Zhang; Cosimo Bambi; Andrew C. Fabian; Javier A. García; Adam Ingram; Erin Kara; James F. Steiner; John A. Tomsick et al.
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Crossref

First Results of IXPE X-ray Polarization Measurements of Cyg X-1 in its Soft State

The Astronomer's Telegram
2023-06 | Research tool
Contributors: Dovciak, Michal; Steiner, James F.; Krawczynski, Henric; Svoboda, Jiri
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NASA Astrophysics Data System

Unraveling Twisty Linear Polarization Morphologies in Black Hole Images

The Astrophysical Journal
2023-06 | Journal article
Contributors: Emami, Razieh; Ricarte, Angelo; Wong, George N.; Palumbo, Daniel; Chang, Dominic; Doeleman, Sheperd S.; Broderick, Avery E.; Narayan, Ramesh; Wielgus, Maciek; Blackburn, Lindy et al.
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NASA Astrophysics Data System

Reflection and Timing Study of the Transient Black Hole X-Ray Binary MAXI J1803-298 with NuSTAR

The Astrophysical Journal
2023-06-01 | Journal article
Contributors: Benjamin M. Coughenour; John A. Tomsick; Guglielmo Mastroserio; James F. Steiner; Riley M. T. Connors; Jiachen Jiang; Jeremy Hare; Aarran W. Shaw; Renee M. Ludlam; A. C. Fabian et al.
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Crossref

The First X-ray Polarization Observation of the Black Hole X-ray Binary 4U 1630-47 in the Steep Power Law State

arXiv e-prints
2023-05 | Working paper
Contributors: Rodriguez Cavero, Nicole; Marra, Lorenzo; Krawczynski, Henric; Dovčiak, Michal; Bianchi, Stefano; Steiner, James F.; Svoboda, Jiri; Capitanio, Fiamma; Matt, Giorgio; Negro, Michela et al.
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NASA Astrophysics Data System

A bright radio flare observed in GRS 1915+105 with the Medicina and RATAN radio telescopes with no X-ray counterpart in the INTEGRAL energy range

The Astronomer's Telegram
2023-04 | Research tool
Contributors: Egron, E.; Rodriguez, J.; Trushkin, S. A.; Pellizzoni, A.; Pilia, M.; Melis, A.; Righini, S.; Bouchet, T.; Cangemi, F.; Coleiro, A. et al.
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NASA Astrophysics Data System

Discovery of the luminous X-ray ignition eRASSt J234402.9−352640. I. Tidal disruption event or a rapid increase in accretion in an active galactic nucleus?

Astronomy and Astrophysics
2023-04 | Journal article
BIBCODE:

2023A&A...672A.167H

Contributors: Homan, D.; Krumpe, M.; Markowitz, A.; Saha, T.; Gokus, A.; Partington, E.; Lamer, G.; Malyali, A.; Liu, Z.; Rau, A. et al.
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NASA Astrophysics Data System

The high polarisation of the X-rays from the Black Hole X-ray Binary 4U 1630-47 challenges standard thin accretion disc scenario

arXiv e-prints
2023-04 | Working paper
Contributors: Ratheesh, Ajay; Dovčiak, Michal; Krawczynski, Henric; Podgorný, Jakub; Marra, Lorenzo; Veledina, Alexandra; Suleimanov, Valery; Rodriguez Cavero, Nicole; Steiner, James; Svoboda, Jiri et al.
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NASA Astrophysics Data System

Astronomical puzzle Cyg X-3 is a hidden Galactic ultraluminous X-ray source

arXiv e-prints
2023-03 | Working paper
Contributors: Veledina, Alexandra; Muleri, Fabio; Poutanen, Juri; Podgorný, Jakub; Dovčiak, Michal; Capitanio, Fiamma; Churazov, Eugene; De Rosa, Alessandra; Di Marco, Alessandro; Forsblom, Sofia et al.
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NASA Astrophysics Data System

Clumpy Wind Studies and the Nondetection of a Cyclotron Line in OAO 1657-415

The Astrophysical Journal
2023-03 | Journal article
Contributors: Pradhan, Pragati; Ferrigno, Carlo; Paul, Biswajit; Bozzo, Enrico; El Mellah, Ileyk; Huenemoerder, David P.; Steiner, James F.; Grinberg, Victoria; Furst, Felix; Maitra, Chandreyee et al.
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NASA Astrophysics Data System

VizieR Online Data Catalog: eRASSt J234402.9-352640 optical photometry (Homan+, 2023)

VizieR Online Data Catalog
2023-02 | Dataset
Contributors: Homan, D.; Krumpe, M.; Markowitz, A.; Saha, T.; Gokus, A.; Partington, E.; Lamer, G.; Malyali, A.; Liu, Z.; Rau, A. et al.
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NASA Astrophysics Data System

Using X-ray continuum-fitting to estimate the spin of MAXI J1305–704

Monthly Notices of the Royal Astronomical Society
2023-02-22 | Journal article
Contributors: Ye Feng; James F Steiner; Santiago Ubach Ramirez; Lijun Gou
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Crossref

NICER/NuSTAR Characterization of 4U 1957+11: A Near Maximally Spinning Black Hole Potentially in the Mass Gap

The Astrophysical Journal
2023-02-01 | Journal article
Contributors: Erin Barillier; Victoria Grinberg; David Horn; Michael A. Nowak; Ronald A. Remillard; James F. Steiner; Dominic J. Walton; Jörn Wilms
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Crossref
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