Zobrazeno 1 - 10
of 339
pro vyhledávání: '"Pottschmidt Katja"'
Autor:
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, van der Klis, Michiel, Wilms, Jörn
Publikováno v:
A&A 687, A284 (2024)
The Neutron Star Interior Composition Explorer (NICER) monitoring campaign of Cyg X-1 allows us to study its spectral-timing behavior at energies ${<}1$ keV across all states. The hard state power spectrum can be decomposed into two main broad Lorent
Externí odkaz:
http://arxiv.org/abs/2405.07754
Autor:
Zalot, Nicolas, Sokolova-Lapa, Ekaterina, Stierhof, Jakob, Ballhausen, Ralf, Zainab, Aafia, Pottschmidt, Katja, Fürst, Felix, Thalhammer, Philipp, Islam, Nazma, Diez, Camille M., Kretschmar, Peter, Berger, Katrin, Rothschild, Richard, Malacaria, Christian, Pradhan, Pragati, Wilms, Jörn
Publikováno v:
A&A 686, A95 (2024)
Context. The High-Mass X-ray Binary (HMXB) system GX 301$-$2 is a persistent source with a well-known variable cyclotron line centered at 35 keV. Recently, a second cyclotron line at 50 keV has been reported with a presumably different behavior than
Externí odkaz:
http://arxiv.org/abs/2403.11682
Autor:
Monageng, Itumeleng M., McBride, Vanessa A., Alfonso-Garzon, Julia, Townsend, Lee J., Coley, Joel B., Montesinos, Benjamin, Corbet, Robin H. D., Pottschmidt, Katja
4U 1210-64 is a peculiar X-ray binary that was first discovered in 1978 by the Uhuru satellite. The analysis of the X-ray data revealed a 6.7-day orbital period and an additional long-term modulation that is manifested as low and high flux states. Ba
Externí odkaz:
http://arxiv.org/abs/2311.00008
A puzzling variety of superorbital modulations have been discovered in several supergiant High-Mass X-ray binaries (sgHMXBs). To investigate the mechanisms driving these superorbital modulations, we have analyzed long-term Neil Gehrels Swift Observat
Externí odkaz:
http://arxiv.org/abs/2302.07318
Autor:
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.
Accreting X-ray pulsars (XRPs) undergo luminous X-ray outbursts during which the luminosity-dependent spectral and timing features of the neutron star's emission can be analyzed in detail, thus shedding light on the accretion regime at work. We took
Externí odkaz:
http://arxiv.org/abs/2201.11376
Autor:
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
Publikováno v:
A&A 656, A105 (2021)
Due to the complexity of modeling the radiative transfer inside the accretion columns of neutron star binaries, their X-ray spectra are still commonly described with phenomenological models, for example, a cutoff power law. While the behavior of thes
Externí odkaz:
http://arxiv.org/abs/2109.14565
Autor:
Brumback, McKinley C., Hickox, Ryan C., Fürst, Felix S., Pottschmidt, Katja, Tomsick, John A., Wilms, Jörn, Staubert, Rüdiger, Vrtilek, Saeqa
We present a broad-band X-ray timing study of the variations in pulse behavior with superorbital cycle in the low-mass X-ray binary Her X-1. This source shows a 35-day superorbital modulation in X-ray flux that is likely caused by occultation by a wa
Externí odkaz:
http://arxiv.org/abs/2102.05097
Autor:
Kretschmar Peter, Marcu Diana, Kühnel Matthias, Klochkov Dmitry, Pottschmidt Katja, Staubert Rüdiger, Wilson-Hodge Colleen A., Jenke Peter A., Caballero Isabel, Fürst Felix
Publikováno v:
EPJ Web of Conferences, Vol 64, p 06012 (2014)
In most accreting X-ray pulsars, the periodic signal is very clear and easily shows up as soon as data covering sufficient pulse periods (a few ten) are available. The mean pulse profile is often quite typical for a given source and with minor variat
Externí odkaz:
https://doaj.org/article/2966499d1d45448c8682ac84ce844bb8
Autor:
Kühnel Matthias, Müller Sebastian, Kreykenbohm Ingo, Fürst Felix, Pottschmidt Katja, Rothschild Richard E., Caballero Isabel, Grinberg Victoria, Schönherr Gabriele, Shrader Chris, Klochkov Dmitry, Staubert Rüdiger, Ferrigno Carlo, Torrejón José-Miguel, Martínez-Núñez Silvia, Wilms Jörn
Publikováno v:
EPJ Web of Conferences, Vol 64, p 06003 (2014)
In a former publication, we have analyzed the transient neutron star X-ray binary GRO J1008–57 using all available RXTE-, Swift-, and Suzaku-data. As we have found, the source’s spectral components, i.e., a power-law with high exponential cutoff
Externí odkaz:
https://doaj.org/article/6268430fd3d6476c8d929c40dff272e5
Autor:
Bachetti Matteo, Miyasaka Hiromasa, Harrison Fiona, Fürst Felix, Barret Didier, Bellm Eric C., Boggs Steven E., Chakrabarty Deepto, Chenevez Jerome, Christensen Finn E., Craig William W., Grefenstette Brian W., Hailey Charles J., Madsen Kristin K., Natalucci Lorenzo, Pottschmidt Katja, Stern Daniel, Tomsick John A., Walton Dominic J., Wilms Jörn, Zhang William
Publikováno v:
EPJ Web of Conferences, Vol 64, p 06011 (2014)
The NuSTAR hard X-ray telescope observed the transient Be/X-ray binary GS 0834–430 during its 2012 outburst. The source is detected between 3 – 79 keV with high statistical significance, and we were able to perform very accurate spectral and timi
Externí odkaz:
https://doaj.org/article/d2ea4d81bf52467fac1eb0a61d23cccf