Search Results - "Ballhausen, R."

Systematic Uncertainties of Atomic Data in Photoionization Modeling by Ballhausen, R., Kallman, T. R., Gu, L., Paerels, F.

“…Abstract Fitting plasma models to high-quality spectra is a crucial tool for deriving diagnostics about the physical conditions in various astrophysical…”
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The Long Stare at Hercules X-1. I. Emission Lines from the Outer Disk, the Magnetosphere Boundary, and the Accretion Curtain by Kosec, P., Kara, E., Fabian, A. C., Fürst, F., Pinto, C., Psaradaki, I., Reynolds, C. S., Rogantini, D., Walton, D. J., Ballhausen, R., Canizares, C., Dyda, S., Staubert, R., Wilms, J.

“…Abstract Hercules X-1 is a nearly edge-on accreting X-ray pulsar with a warped accretion disk, precessing with a period of about 35 days. The disk precession…”
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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 by Malacaria, C., Bhargava, Y., Coley, Joel B., Ducci, L., Pradhan, P., Ballhausen, R., Fuerst, F., Islam, N., Jaisawal, G. K., Jenke, P., Kretschmar, P., Kreykenbohm, I., Pottschmidt, K., Sokolova-Lapa, E., Staubert, R., Wilms, J., Wilson-Hodge, C. A., Wolff, Michael T.

“…Accreting X-ray pulsars (XRPs) undergo luminous X-ray outbursts during which the luminosity-dependent spectral and timing features of the neutron star’s…”
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Identification of the Hard X-Ray Source Dominating the E > 25 keV Emission of the Nearby Galaxy M31 by Yukita, M., Ptak, A., Hornschemeier, A. E., Wik, D., Maccarone, T. J., Pottschmidt, K., Zezas, A., Antoniou, V., Ballhausen, R., Lehmer, B. D., Lien, A., Williams, B., Baganoff, F., Boyd, P. T., Enoto, T., Kennea, J., Page, K. L., Choi, Y.

“…We report the identification of a bright hard X-ray source dominating the M31 bulge above 25 keV from a simultaneous NuSTAR-Swift observation. We find that…”
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Simulation of Radiative Transfer Within X-ray Microcalorimeter Absorbers by Lorenz, M., Kirsch, C., Peille, P., Ballhausen, R., Fioretti, V., Lotti, S., Dauser, T., Wilms, J.

“…We present Monte Carlo simulations of radiative transfer within the absorbers of X-ray microcalorimeters, utilizing a numerical model for the photon…”
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A Possible Phase-dependent Absorption Feature in the Transient X-Ray Pulsar SAX J2103.5+4545 by Brumback, M. C., Hickox, R. C., Fürst, F. S., Pottschmidt, K., Hemphill, P., Tomsick, J. A., Wilms, J., Ballhausen, R.

“…We present an X-ray spectral and timing analysis of two Nuclear Spectroscopic Telescope Array (NuSTAR) observations of the transient Be X-ray binary SAX…”
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Vertical wind structure in an X-ray binary revealed by a precessing accretion disk by Kosec, P., Kara, E., Fabian, A. C., Fürst, F., Pinto, C., Psaradaki, I., Reynolds, C. S., Rogantini, D., Walton, D. J., Ballhausen, R., Canizares, C., Dyda, S., Staubert, R., Wilms, J.

“…The accretion of matter onto black holes and neutron stars often leads to the launching of outflows that can greatly affect the environments surrounding the…”
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A new benchmark of soft X-ray transition energies of Ne , CO 2 , and SF 6 : paving a pathway towards ppm accuracy by Stierhof, J, Kühn, S, Winter, M, Micke, P, Steinbrügge, R, Shah, C, Hell, N, Bissinger, M, Hirsch, M, Ballhausen, R, Lang, M, Gräfe, C, Wipf, S, Cumbee, R, Betancourt-Martinez, G L, Park, S, Niskanen, J, Chung, M, Porter, F S, Stöhlker, T, Pfeifer, T, Brown, G V, Bernitt, S, Hansmann, P, Wilms, J, Crepso López-Urrutia, J R, Leutenegger, M A

“…A key requirement for the correct interpretation of high-resolution X-ray spectra is that transition energies are known with high accuracy and precision. We…”
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A new benchmark of soft X-ray transition energies of Ne, CO2, and SF6: paving a pathway towards ppm accuracy by Stierhof, J., Kühn, S., Winter, M., Micke, P., Steinbrügge, R., Shah, C., Hell, N., Bissinger, M., Hirsch, M., Ballhausen, R., Lang, M., Gräfe, C., Wipf, S., Cumbee, R., Betancourt-Martinez, G. L., Park, S., Niskanen, J., Chung, M., Porter, F. S., Stöhlker, T., Pfeifer, T., Brown, G. V., Bernitt, S., Hansmann, P., Wilms, J., Crespo López-Urrutia, J. R., Leutenegger, M. A.

“…A key requirement for the correct interpretation of high-resolution X-ray spectra is that transition energies are known with high accuracy and precision. We…”
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High-Precision Determination of Oxygen K_{α} Transition Energy Excludes Incongruent Motion of Interstellar Oxygen by Leutenegger, M A, Kühn, S, Micke, P, Steinbrügge, R, Stierhof, J, Shah, C, Hell, N, Bissinger, M, Hirsch, M, Ballhausen, R, Lang, M, Gräfe, C, Wipf, S, Cumbee, R, Betancourt-Martinez, G L, Park, S, Yerokhin, V A, Surzhykov, A, Stolte, W C, Niskanen, J, Chung, M, Porter, F S, Stöhlker, T, Pfeifer, T, Wilms, J, Brown, G V, Crespo López-Urrutia, J R, Bernitt, S

“…We demonstrate a widely applicable technique to absolutely calibrate the energy scale of x-ray spectra with experimentally well-known and accurately calculable…”
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Correction to: A new benchmark of soft X-ray transition energies of Ne, CO2, and SF6: paving a pathway towards ppm accuracy by Stierhof, J., Kühn, S., Winter, M., Micke, P., Steinbrügge, R., Shah, C., Hell, N., Bissinger, M., Hirsch, M., Ballhausen, R., Lang, M., Gräfe, C., Wipf, S., Cumbee, R., Betancourt-Martinez, G. L., Park, S., Niskanen, J., Chung, M., Porter, F. S., Stöhlker, T., Pfeifer, T., Brown, G. V., Bernitt, S., Hansmann, P., Wilms, J., Crespo López-Urrutia, J. R., Leutenegger, M. A.

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High-Precision Determination of Oxygen K α Transition Energy Excludes Incongruent Motion of Interstellar Oxygen by Leutenegger, M. A., Kühn, S., Micke, P., Steinbrügge, R., Stierhof, J., Shah, C., Hell, N., Bissinger, M., Hirsch, M., Ballhausen, R., Lang, M., Gräfe, C., Wipf, S., Cumbee, R., Betancourt-Martinez, G. L., Park, S., Yerokhin, V. A., Surzhykov, A., Stolte, W. C., Niskanen, J., Chung, M., Porter, F. S., Stöhlker, T., Pfeifer, T., Wilms, J., Brown, G. V., Crespo López-Urrutia, J. R., Bernitt, S.

“…We demonstrate a widely applicable technique to absolutely calibrate the energy scale of x-ray spectra with experimentally well-known and accurately calculable…”
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A Precessing Be Disc as a Possible Model for Occultation Events in GX 304-1 by Kühnel, M., Rothschild, R. E., Okazaki, A. T., Müller, S., Pottschmidt, Katja, Ballhausen, R., Choi, J., Kreykenbohm, I., Fürst, F., Marcu-Cheatham, D. M., Hemphill, P., Sagredo, M., Kretschmar, P., Martínez-Núñez, S., Torrejón, J. M., Staubert, R., Wilms, J.

“…We report on the RXTE detection of a sudden increase in the absorption column density, NH, during the 2011 May outburst of GX 304−1. The NH increased up to ∼16…”
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A new benchmark of soft X-ray transition energies of $$\mathrm {Ne}$$, $$\mathrm {CO}_2$$, and $$\mathrm {SF}_6$$: paving a pathway towards ppm accuracy by Stierhof, J., Kühn, S., Winter, M., Micke, P., Steinbrügge, R., Shah, C., Hell, N., Bissinger, M., Hirsch, M., Ballhausen, R., Lang, M., Gräfe, C., Wipf, S., Cumbee, R., Betancourt-Martinez, G. L., Park, S., Niskanen, J., Chung, M., Porter, F. S., Stöhlker, T., Pfeifer, T., Brown, G. V., Bernitt, S., Hansmann, P., Wilms, J., Crespo López-Urrutia, J. R., Leutenegger, M. A.

“…Abstract A key requirement for the correct interpretation of high-resolution X-ray spectra is that transition energies are known with high accuracy and…”
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A new benchmark of soft X-ray transition energies of \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\mathrm {Ne}$$\end{document}Ne, \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlen by Stierhof, J., Kühn, S., Winter, M., Micke, P., Steinbrügge, R., Shah, C., Hell, N., Bissinger, M., Hirsch, M., Ballhausen, R., Lang, M., Gräfe, C., Wipf, S., Cumbee, R., Betancourt-Martinez, G. L., Park, S., Niskanen, J., Chung, M., Porter, F. S., Stöhlker, T., Pfeifer, T., Brown, G. V., Bernitt, S., Hansmann, P., Wilms, J., Crespo López-Urrutia, J. R., Leutenegger, M. A.

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The giant outburst of EXO 2030+375 II: Broadband spectroscopy and evolution by Ballhausen, R, Thalhammer, P, Pradhan, P, Sokolova-Lapa, E, Stierhof, J, Pottschmidt, K, Wilms, J, Coley, J. B, Kretschmar, P, Fuerst, F, Becker, P, West, B, Malacaria, C, Wolff, M. T, Rothschild, R, Staubert, R

“…In 2021, the high-mass X-ray binary EXO 2030+375 underwent a giant X-ray outburst, the first since 2006, that reached a peak flux of…”
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The giant outburst of EXO 2030+375 I: Spectral and pulse profile evolution by Thalhammer, P, Ballhausen, R, Sokolova-Lapa, E, Stierhof, J, Zainab, A, Staubert, R, Pottschmidt, K, Coley, J. B, Rothschild, R. E, Jaisawal, G. K, West, B, Becker, P. A, Pradhan, P, Kretschmar, P, Wilms, J

“…A&A 688, A213 (2024) The Be X-ray binary EXO 2030+375 went through its third recorded giant outburst from June 2021 to early 2022. We present the results of…”
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Vertical wind structure in an X-ray binary revealed by a precessing accretion disk by Kosec, P, Kara, E, Fabian, A. C, Fürst, F, Pinto, C, Psaradaki, I, Reynolds, C. S, Rogantini, D, Walton, D. J, Ballhausen, R, Canizares, C, Dyda, S, Staubert, R, Wilms, J

“…The accretion of matter onto black holes and neutron stars often leads to the launching of outflows that can greatly affect the environments surrounding the…”
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The long stare at Hercules X-1 -- I. Emission lines from the outer disk, the magnetosphere boundary and the accretion curtain by Kosec, P, Kara, E, Fabian, A. C, Furst, F, Pinto, C, Psaradaki, I, Reynolds, C. S, Rogantini, D, Walton, D. J, Ballhausen, R, Canizares, C, Dyda, S, Staubert, R, Wilms, J

“…Hercules X-1 is a nearly edge-on accreting X-ray pulsar with a warped accretion disk, precessing with a period of about 35 days. The disk precession allows for…”
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A new benchmark of soft X-ray transition energies of Ne, CO$_2$, and SF$_6$: paving a pathway towards ppm accuracy by Stierhof, J, Kühn, S, Winter, M, Micke, P, Steinbrügge, R, Shah, C, Hell, N, Bissinger, M, Hirsch, M, Ballhausen, R, Lang, M, Gräfe, C, Wipf, S, Cumbee, R, Betancourt-Martinez, G. L, Park, S, Niskanen, J, Chung, M, Porter, F. S, Stöhlker, T, Pfeifer, T, Brown, G. V, Bernitt, S, Hansmann, P, Wilms, J, López-Urrutia, J. R. Crespo, Leutenegger, M. A

“…A key requirement for the correct interpretation of high-resolution X-ray spectra is that transition energies are known with high accuracy and precision. We…”
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