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19 results for Ballhausen,+Ralf

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Stellar wind variability in Cygnus X-1 from high-resolution excess variance spectroscopy with Chandra
Author / Creator:Härer, Lucia K ; Parker, Michael L ; Ileyk El Mellah ; Grinberg, Victoria ; Ballhausen, Ralf ; Igo, Zsofi ; Joyce, Amy ; Wilms, Jörn
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2023-09
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An in-depth analysis of the variable cyclotron lines in GX 301\(-\)2
Author / Creator:Zalot, Nicolas ; Sokolova-Lapa, Ekaterina ; Stierhof, Jakob ; Ballhausen, Ralf ; Aafia Zainab ; Pottschmidt, Katja ; Fürst, Felix ; Thalhammer, Philipp ; Islam, Nazma ; Diez, Camille M ; Kretschmar, Peter ; Berger, Katrin ; Rothschild, Richard ; Malacaria, Christian ; Pradhan, Pragati ; Wilms, Jörn
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2024-03
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Long term variability of Cygnus X-1. VIII. A spectral-timing look at low energies with NICER
Author / Creator:König, Ole ; Mastroserio, Guglielmo ; Dauser, Thomas ; Méndez, Mariano ; Wang, Jingyi ; García, Javier A ; Steiner, James F ; Pottschmidt, Katja ; Ballhausen, Ralf ; Connors, Riley M ; García, Federico ; Grinberg, Victoria ; Horn, David ; Ingram, Adam ; Kara, Erin ; Kallman, Timothy R ; Lucchini, Matteo ; Nathan, Edward ; Nowak, Michael A ; Thalhammer, Philipp ; Michiel van der Klis ; Wilms, Jörn
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2024-05
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Fitting strategies of accretion column models and application to the broadband spectrum of Cen X-3
Author / Creator:Thalhammer, Philipp ; Bissinger, Matthias ; Ballhausen, Ralf ; Pottschmidt, Katja ; Wolff, Michael T ; Stierhof, Jakob ; Sokolova-Lapa, Ekaterina ; Fürst, Felix ; Malacaria, Christian ; Gottlieb, Amy ; Marcu-Cheatham, Diana M ; Becker, Peter A ; Wilms, Jörn
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2021-09
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Explaining the asymmetric line profile in Cepheus X-4 with spectral variation across pulse phase
Author / Creator:Bhargava, Yash ; Bhalerao, Varun ; Ballhausen, Ralf ; Fürst, Felix ; Pottschmidt, Katja ; Tomsick, John A ; Wilms, Joern
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2018-10
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Chandra X-ray spectroscopy of the focused wind in the Cygnus X-1 system III. Dipping in the low/hard state
Author / Creator:Hirsch, Maria ; Hell, Natalie ; Grinberg, Victoria ; Ballhausen, Ralf ; Nowak, Michael A ; Pottschmidt, Katja ; Schulz, Norbert S ; Dauser, Thomas ; Hanke, Manfred ; Kallman, Timothy R ; Brown, Gregory V ; Wilms, Jörn
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2019-05
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Observation of strong two-electron--one-photon transitions in few-electron ion
Author / Creator:Togawa, Moto ; Kühn, Steffen ; Shah, Chintan ; Amaro, Pedro ; Steinbrügge, René ; Stierhof, Jakob ; Hell, Natalie ; Rosner, Michael ; Fujii, Keisuke ; Bissinger, Matthias ; Ballhausen, Ralf ; Hoesch, Moritz ; Seltmann, Jörn ; Park, SungNam ; Grilo, Filipe ; Porter, F Scott ; Santos, José Paulo ; Chung, Moses ; Stöhlker, Thomas ; Wilms, Jörn ; Pfeifer, Thomas ; Brown, Gregory V ; Leutenegger, Maurice A ; Bernitt, Sven ; Crespo López-Urrutia, José R
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2020-11
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Multiwavelength study of 1eRASS J085039.9-421151 with eROSITA NuSTAR and X-shooter
Author / Creator:Aafia Zainab ; Avakyan, Artur ; Doroshenko, Victor ; Thalhammer, Philipp ; Sokolova-Lapa, Ekaterina ; Ballhausen, Ralf ; Zalot, Nicolas ; Stierhof, Jakob ; Haemmerich, Steven ; Diez, Camille M ; Weber, Philipp ; Dauser, Thomas ; Berger, Katrin ; Kretschmar, Peter ; Pottschmidt, Katja ; Pradhan, Pragati ; Islam, Nazma ; Maitra, Chandreyee ; Coley, Joel B ; Blay, Pere ; Corbet, Robin H D ; Rothschild, Richard E ; Wood, Kent ; Santangelo, Andrea ; Heber, Ulrich ; Wilms, Joern
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2024-11
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Sharp Periodic Flares and Long-Term Variability in the High-Mass X-ray Binary XTE J1829-098 from RXTE PCA, Swift BAT and MAXI Observations
Author / Creator:Corbet, Robin H D ; Ballhausen, Ralf ; Becker, Peter A ; Coley, Joel B ; Fuerst, Felix ; Gendreau, Keith C ; Guillot, Sebastien ; Islam, Nazma ; Jaisawal, Gaurava Kumar ; Jenke, Peter ; Kretschmar, Peter ; Lange, Alexander ; Malacaria, Christian ; Ng, Mason ; Pottschmidt, Katja ; Pradhan, Pragati ; Ray, Paul S ; Rothschild, Richard E ; Thalhammer, Philipp ; Townsend, Lee J ; Wilms, Joern ; Wilson-Hodge, Colleen A ; Wolff, Michael T
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2024-10
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A possible phase dependent absorption feature in the transient X-ray pulsar SAX J2103.5+4545
Author / Creator:Brumback, McKinley C ; Hickox, Ryan C ; Fürst, Felix S ; Pottschmidt, Katja ; Hemphill, Paul ; Tomsick, John A ; Wilms, Jörn ; Ballhausen, Ralf
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2017-12
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Evidence for different accretion regimes in GRO J1008-57
Author / Creator:Kühnel, Matthias ; Fürst, Felix ; Pottschmidt, Katja ; Kreykenbohm, Ingo ; Ballhausen, Ralf ; Falkner, Sebastian ; Rothschild, Richard E ; Klochkov, Dmitry ; Wilms, Jörn
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2017-08
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Discovery of pulsation dropout and turn-on during the high state of the accreting X-ray pulsar LMC X-4
Author / Creator:Brumback, McKinley C ; Hickox, Ryan C ; Bachetti, Matteo ; Ballhausen, Ralf ; Fürst, Felix S ; Pike, Sean ; Pottschmidt, Katja ; Tomsick, John A ; Wilms, Jörn
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2018-06
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The giant outburst of 4U 0115+634 in 2011 with Suzaku and RXTE
Author / Creator:Matthias Bissinger né Kühnel ; Kreykenbohm, Ingo ; Ferrigno, Carlo ; Pottschmidt, Katja ; Marcu-Cheatham, Diana M ; Fürst, Felix ; Rothschild, Richard E ; Kretschmar, Peter ; Klochkov, Dmitry ; Hemphill, Paul ; Hertel, Dominik ; Müller, Sebastian ; Sokolova-Lapa, Ekaterina ; Bosco Oruru ; Grinberg, Victoria ; Martínez-Núñez, Silvia ; Torrejón, José M ; Becker, Peter A ; Wolff, Michael T ; Ballhausen, Ralf ; Fritz-Walter Schwarm ; Wilms, Jörn
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2019-12
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High Resolution Photoexcitation Measurements Exacerbate the Long-Standing Fe XVII Oscillator Strength Problem
Author / Creator:Kühn, Steffen ; Shah, Chintan ; Crespo López-Urrutia, José R ; Fujii, Keisuke ; Steinbrügge, René ; Stierhof, Jakob ; Togawa, Moto ; Harman, Zoltán ; Oreshkina, Natalia S ; Cheung, Charles ; Kozlov, Mikhail G ; Porsev, Sergey G ; Safronova, Marianna S ; Berengut, Julian C ; Rosner, Michael ; Bissinger, Matthias ; Ballhausen, Ralf ; Hell, Natalie ; Park, SungNam ; Chung, Moses ; Hoesch, Moritz ; Seltmann, Jörn ; Surzhykov, Andrey S ; Yerokhin, Vladimir A ; Wilms, Jörn ; Porter, F Scott ; Stöhlker, Thomas ; Keitel, Christoph H ; Pfeifer, Thomas ; Brown, Gregory V ; Leutenegger, Maurice A ; Bernitt, Sven
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2020-06
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Looking at A 0535+26 at low luminosities with NuSTAR
Author / Creator:Ballhausen, Ralf ; Pottschmidt, Katja ; Fürst, Felix ; Wilms, Jörn ; Tomsick, John A ; Fritz-Walter Schwarm ; Stern, Daniel ; Kretschmar, Peter ; Caballero, Isabel ; Harrison, Fiona A ; Boggs, Steven E ; Christensen, Finn E ; Craig, William W ; Hailey, Charles J ; Zhang, William W
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2017-07
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Suzaku observations of the 2013 outburst of KS 1947+300
Author / Creator:Ballhausen, Ralf ; Kühnel, Matthias ; Pottschmidt, Katja ; Fürst, Felix ; Hemphill, Paul B ; Falkner, Sebastian ; Gottlieb, Amy M ; Grinberg, Victoria ; Kretschmar, Peter ; Kreykenbohm, Ingo ; Rothschild, Richard E ; Wilms, Jörn
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2016-03
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Accreting on the edge: a luminosity-dependent cyclotron line in the Be/X-ray Binary 2S 1553-542 accompanied by accretion regimes transition
Author / Creator:Malacaria, Christian ; Bhargava, Yash ; Coley, Joel B ; Ducci, Lorenzo ; Pradhan, Pragati ; Ballhausen, Ralf ; Fuerst, Felix ; Islam, Nazma ; Jaisawal, Gaurava K ; Jenke, Peter ; Kretschmar, Peter ; Kreykenbohm, Ingo ; Pottschmidt, Katja ; Sokolova-Lapa, Ekaterina ; Staubert, Rudiger ; Wilms, Joern ; Wilson-Hodge, Colleen A ; Wolff, Michael T
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2022-02
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A precessing Be disk as a possible model for occultation events in GX 304-1
Author / Creator:Kühnel, Matthias ; Rothschild, Richard E ; Okazaki, Atsuo T ; Müller, Sebastian ; Pottschmidt, Katja ; Ballhausen, Ralf ; Choi, Jieun ; Kreykenbohm, Ingo ; Fürst, Felix ; Marcu-Cheatham, Diana M ; Hemphill, Paul ; Sagredo, Macarena ; Kretschmar, Peter ; Martínez-Núñez, Silvia ; José Miguel Torrejón ; Staubert, Rüdiger ; Wilms, Jörn
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2017-06
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The Goodness of Simultaneous Fits in ISIS
Author / Creator:Kühnel, Matthias ; Falkner, Sebastian ; Grossberger, Christoph ; Ballhausen, Ralf ; Dauser, Thomas ; Fritz-Walter Schwarm ; Kreykenbohm, Ingo ; Nowak, Michael A ; Pottschmidt, Katja ; Ferrigno, Carlo ; Rothschild, Richard E ; Martínez-Núñez, Silvia ; José Miguel Torrejón ; Fürst, Felix ; Klochkov, Dmitry ; Staubert, Rüdiger ; Kretschmar, Peter ; Wilms, Jörn
Publisher:Ithaca: Cornell University Library, arXiv.org
Journal title:arXiv.org, 2016-05
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Stellar wind variability in Cygnus X-1 from high-resolution excess variance spectroscopy with Chandra

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An in-depth analysis of the variable cyclotron lines in GX 301\(-\)2

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Long term variability of Cygnus X-1. VIII. A spectral-timing look at low energies with NICER

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Fitting strategies of accretion column models and application to the broadband spectrum of Cen X-3

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Explaining the asymmetric line profile in Cepheus X-4 with spectral variation across pulse phase

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Chandra X-ray spectroscopy of the focused wind in the Cygnus X-1 system III. Dipping in the low/hard state

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Observation of strong two-electron--one-photon transitions in few-electron ion

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Multiwavelength study of 1eRASS J085039.9-421151 with eROSITA NuSTAR and X-shooter

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Sharp Periodic Flares and Long-Term Variability in the High-Mass X-ray Binary XTE J1829-098 from RXTE PCA, Swift BAT and MAXI Observations

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A possible phase dependent absorption feature in the transient X-ray pulsar SAX J2103.5+4545

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Evidence for different accretion regimes in GRO J1008-57

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Discovery of pulsation dropout and turn-on during the high state of the accreting X-ray pulsar LMC X-4

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The giant outburst of 4U 0115+634 in 2011 with Suzaku and RXTE

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High Resolution Photoexcitation Measurements Exacerbate the Long-Standing Fe XVII Oscillator Strength Problem

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Looking at A 0535+26 at low luminosities with NuSTAR

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Suzaku observations of the 2013 outburst of KS 1947+300

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Accreting on the edge: a luminosity-dependent cyclotron line in the Be/X-ray Binary 2S 1553-542 accompanied by accretion regimes transition

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A precessing Be disk as a possible model for occultation events in GX 304-1

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The Goodness of Simultaneous Fits in ISIS

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