Zobrazeno 1 - 10
of 470
pro vyhledávání: '"C. B. Markwardt"'
Autor:
Axel Schwope, Johan Comparat, Zaven Arzoumanian, David A. H. Buckley, Mara Salvato, Mirko Krumpe, Georg Lamer, Mariusz Gromadzki, Gabriele Ponti, Ron Remillard, C. B. Markwardt, J. Wolf, Erin Kara, Keith C. Gendreau, Dheeraj R. Pasham, R. Arcodia, Miriam E. Ramos-Ceja, Andrea Merloni, A. Malyali, Kirpal Nandra, Arne Rau, Johannes Buchner, M. Schramm, David Bogensberger
Publikováno v:
Nature
Quasi-periodic eruptions (QPEs) are very-high-amplitude bursts of X-ray radiation recurring every few hours and originating near the central supermassive black holes of galactic nuclei1,2. It is currently unknown what triggers these events, how long
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e9eedd7716cbc8a115fbe30ca3d7872
http://europepmc.org/articles/PMC8081662
http://europepmc.org/articles/PMC8081662
Autor:
A. P. Beardmore, N. P. M. Kuin, J. P. Osborne, J. U. Ness, F. M. Walter, C. B. Markwardt, Marina Orio, Kirill Sokolovsky, K. L. Page
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 499:4814-4831
V3890 Sgr is a recurrent nova which has been seen in outburst three times so far, with the most recent eruption occurring on 2019 August 27 UT. This latest outburst was followed in detail by the Neil Gehrels Swift Observatory, from less than a day af
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::67d58acbf0a583caf3407e48514bcbc3
https://doi.org/10.1093/mnras/staa3083
https://doi.org/10.1093/mnras/staa3083
Autor:
K. Alabarta, Jeroen Homan, D. J. K. Buisson, J. Neilsen, Arkadip Basak, Tod E. Strohmayer, Zaven Arzoumanian, Keith C. Gendreau, R. Remillard, James F. Steiner, Mariano Mendez, Federico García, Liang Zhang, Diego Altamirano, C. B. Markwardt, P. Uttley
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 505(3), 3823-3843. Oxford University Press
We present a systematic spectral-timing analysis of a fast appearance/disappearance of a type-B quasi-periodic oscillation (QPO), observed in four NICER observations of MAXI J1348-630. By comparing the spectra of the period with and without the type-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e8650eb84262edf3bad8d3e5dd280d99
http://arxiv.org/abs/2105.12338
http://arxiv.org/abs/2105.12338
Autor:
Keith C. Gendreau, Michael Loewenstein, Michael T. Wolff, Sebastien Guillot, H. T. Cromartie, Paul S. Ray, Sridhar S. Manthripragada, Emmanuel Fonseca, Ingrid H. Stairs, Sharon M. Morsink, Matthew Kerr, Takashi Okajima, C. B. Markwardt, James M. Lattimer, Zaven Arzoumanian, Ismaël Cognard, Aditya Parthasarathy, Wynn C. G. Ho, Frederick K. Lamb, Scott M. Ransom, Alexander J. Dittmann, S. Pollard, Charles Baker, Lucas Guillemot, Thoniel Cazeau, M. C. Miller, Slavko Bogdanov, Timothy T. Pennucci
Publikováno v:
The Astrophysical journal letters
The Astrophysical journal letters, Bristol : IOP Publishing, 2021, 918 (2), pp.L28. ⟨10.3847/2041-8213/ac089b⟩
The Astrophysical journal letters, Bristol : IOP Publishing, 2021, 918 (2), pp.L28. ⟨10.3847/2041-8213/ac089b⟩
PSR J0740$+$6620 has a gravitational mass of $2.08\pm 0.07~M_\odot$, which is the highest reliably determined mass of any neutron star. As a result, a measurement of its radius will provide unique insight into the properties of neutron star core matt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be0b757a8c589e703b30802a3a320dbf
http://arxiv.org/abs/2105.06979
http://arxiv.org/abs/2105.06979
Autor:
C. B. Markwardt, Tod E. Strohmayer, R. Remillard, Keith C. Gendreau, Diego Altamirano, J. Neilsen, Andrea Sanna, Arkadip Basak, Peter Bult, Francesco Tombesi, Zaven Arzoumanian, Liang Zhang, James F. Steiner, Phil Uttley, F. M. Vincentelli, Teruaki Enoto, V. A. Cúneo, K. Alabarta, Jeroen Homan
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 499(1), 851-861. Oxford University Press
We studied the outburst evolution and timing properties of the recently discovered X-ray transient MAXI J1348-630 as observed with NICER. We produced the fundamental diagrams commonly used to trace the spectral evolution, and power density spectra to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::998ea380dc8eef9a47cf58b711164ed3
http://arxiv.org/abs/2009.07749
http://arxiv.org/abs/2009.07749
Autor:
C. B. Markwardt, K. Alabarta, Jeroen Homan, Mariano Mendez, Keith C. Gendreau, Teruaki Enoto, R. Remillard, V. A. Cúneo, Phil Uttley, James F. Steiner, Renee M. Ludlam, Zaven Arzoumanian, Francesco Tombesi, A. Castro, Tod E. Strohmayer, Peter Bult, D. J. K. Buisson, Diego Altamirano, Liang Zhang
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 497(3), 3896-3910. Oxford University Press
Monthly Notices of the Royal Astronomical Society, 497(3). Oxford University Press
Monthly Notices of the Royal Astronomical Society, 497(3). Oxford University Press
We present a detailed X-ray spectral and variability study of the full 2018 outburst of MAXI J1727-203 using NICER observations. The outburst lasted approximately four months. Spectral modelling in the 0.3-10 keV band shows the presence of both a sof
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf6537a0bd368170c0012fba36e4a21b
https://dare.uva.nl/personal/pure/en/publications/xray-spectral-and-timing-evolution-of-maxi-j1727203-with-nicer(c031f586-3eb3-4dec-b512-7e71c3daf769).html
https://dare.uva.nl/personal/pure/en/publications/xray-spectral-and-timing-evolution-of-maxi-j1727203-with-nicer(c031f586-3eb3-4dec-b512-7e71c3daf769).html
Autor:
Javier A. García, Christian Malacaria, A. C. Fabian, Edward M. Cackett, Gaurava K. Jaisawal, Peter Bult, Jonah Miller, Sebastien Guillot, C. B. Markwardt, Renee M. Ludlam, Tod E. Strohmayer
Publikováno v:
Astrophys.J.
Astrophys.J., 2020, 895 (1), pp.45. ⟨10.3847/1538-4357/ab89a6⟩
Ludlam, R M, Cackett, E M, García, J A, Miller, J M, Bult, P M, Strohmayer, T E, Guillot, S, Jaisawal, G K, Malacaria, C, Fabian, A C & Markwardt, C B 2020, ' NICER–NuSTAR Observations of the Neutron Star Low-mass X-Ray Binary 4U 1735–44 ', Astrophysical Journal, vol. 895, no. 1, 45 . https://doi.org/10.3847/1538-4357/ab89a6
Astrophys.J., 2020, 895 (1), pp.45. ⟨10.3847/1538-4357/ab89a6⟩
Ludlam, R M, Cackett, E M, García, J A, Miller, J M, Bult, P M, Strohmayer, T E, Guillot, S, Jaisawal, G K, Malacaria, C, Fabian, A C & Markwardt, C B 2020, ' NICER–NuSTAR Observations of the Neutron Star Low-mass X-Ray Binary 4U 1735–44 ', Astrophysical Journal, vol. 895, no. 1, 45 . https://doi.org/10.3847/1538-4357/ab89a6
We report on the first simultaneous $NICER$ and $NuSTAR$ observations of the neutron star (NS) low-mass X-ray binary 4U 1735$-$44, obtained in 2018 August. The source was at a luminosity of $\sim1.8~(D/5.6\ \mathrm{kpc})^{2}\times10^{37}$ ergs s$^{-1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f825a211ef3a5a484be2102b0e50a7c
https://hal.archives-ouvertes.fr/hal-02564592
https://hal.archives-ouvertes.fr/hal-02564592
Autor:
Samuel R. Price, R. Spiewak, Paul Demorest, Sarah J. Vigeland, Slavko Bogdanov, W. W. Zhu, Timothy Dolch, Michael T. Lam, Julia S. Deneva, Peter A. Gentile, Cherry Ng, Zaven Arzoumanian, Harsha Blumer, D. R. Lorimer, N. Garver-Daniels, Maura McLaughlin, K. S. Wood, Matthew Kerr, J. Doty, Paul S. Ray, Scott M. Ransom, C. B. Markwardt, C. Malacaria, Joseph K. Swiggum, J. A. Ellis, Ingrid H. Stairs, M. L. Jones, Sebastien Guillot, Emmanuel Fonseca, Andrea N. Lommen, Paul R. Brook, Alice K. Harding, Kevin Stovall, Kevin Black, L. Guillemot, Robert D. Ferdman, David J. Nice, Timothy T. Pennucci, Luke M. Winternitz, Ismaël Cognard, M. T. Wolff, E. C. Ferrara, Ryan S. Lynch, H. T. Cromartie, M. E. DeCesar, Paul T. Baker, Natalia Lewandowska, Keith Gendreau
Publikováno v:
The Astrophysical Journal
The Astrophysical Journal, American Astronomical Society, 2019, 874 (2), pp.160. ⟨10.3847/1538-4357/ab0966⟩
Astrophys.J.
Astrophys.J., 2019, 874 (2), pp.160. ⟨10.3847/1538-4357/ab0966⟩
The Astrophysical Journal, American Astronomical Society, 2019, 874 (2), pp.160. ⟨10.3847/1538-4357/ab0966⟩
Astrophys.J.
Astrophys.J., 2019, 874 (2), pp.160. ⟨10.3847/1538-4357/ab0966⟩
The Neutron Star Interior Composition Explorer (NICER) is an X-ray astrophysics payload on the International Space Station. It enables unprecedented high-precision timing of millisecond pulsars without the pulse broadening and delays due to dispersio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d60650d72a2a4f8a8dcc6b64e2fa540
https://hal.archives-ouvertes.fr/hal-02097437/document
https://hal.archives-ouvertes.fr/hal-02097437/document
Autor:
Edward M. Cackett, Frederick K. Lamb, Jon M. Miller, Tolga Guver, Zaven Arzoumanian, Laurens Keek, Andrew C. Fabian, Gaurava K. Jaisawal, Jérôme Chenevez, Gregory Y. Prigozhin, Deepto Chakrabarty, Y. Soong, Simin Mahmoodifar, C. B. Markwardt, Michael T. Wolff, Renee M. Ludlam, Peter Bult, Tod E. Strohmayer, Jeroen Homan, Keith C. Gendreau, Sebastien Guillot
Publikováno v:
Astrophys.J.Lett.
Astrophys.J.Lett., 2018, 855 (1), pp.L4. ⟨10.3847/2041-8213/aab104⟩
Keek, L, Arzoumanian, Z, Bult, P, Cackett, E M, Chakrabarty, D, Chenevez, J, Fabian, A C, Gendreau, K C, Guillot, S, Güver, T, Homan, J, Jaisawal, G K, Lamb, F K, Ludlam, R M, Mahmoodifar, S, Markwardt, C B, Miller, J M, Prigozhin, G, Soong, Y, Strohmayer, T E & Wolff, M T 2018, ' NICER Observes the Effects of an X-Ray Burst on the Accretion Environment in Aql X-1 ', The Astrophysical Journal Letters, vol. 855, no. 1, L4 . https://doi.org/10.3847/2041-8213/aab104
Astrophys.J.Lett., 2018, 855 (1), pp.L4. ⟨10.3847/2041-8213/aab104⟩
Keek, L, Arzoumanian, Z, Bult, P, Cackett, E M, Chakrabarty, D, Chenevez, J, Fabian, A C, Gendreau, K C, Guillot, S, Güver, T, Homan, J, Jaisawal, G K, Lamb, F K, Ludlam, R M, Mahmoodifar, S, Markwardt, C B, Miller, J M, Prigozhin, G, Soong, Y, Strohmayer, T E & Wolff, M T 2018, ' NICER Observes the Effects of an X-Ray Burst on the Accretion Environment in Aql X-1 ', The Astrophysical Journal Letters, vol. 855, no. 1, L4 . https://doi.org/10.3847/2041-8213/aab104
Accretion disks around neutron stars regularly undergo sudden strong irradiation by Type I X-ray bursts powered by unstable thermonuclear burning on the stellar surface. We investigate the impact on the disk during one of the first X-ray burst observ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::904fc9014240e46650e2cdba44f19db9
http://arxiv.org/abs/1808.06441
http://arxiv.org/abs/1808.06441
Autor:
A. Marino, Paul S. Ray, Keith C. Gendreau, Deepto Chakrabarty, L. Ducci, R. Iaria, Peter Bult, Alessandro Papitto, Teruaki Enoto, Gaurava K. Jaisawal, Sebastien Guillot, Zaven Arzoumanian, C. B. Markwardt, Carlo Ferrigno, Tod E. Strohmayer, Luciano Burderi, A. Riggio, Diego Altamirano, A. Sanna, Michael T. Wolff, T. Di Salvo, Angelo Gambino, Slavko Bogdanov, Enrico Bozzo
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2018, 617, pp.L8. ⟨10.1051/0004-6361/201834160⟩
Astron.Astrophys.
Astron.Astrophys., 2018, 617, pp.L8. ⟨10.1051/0004-6361/201834160⟩
Sanna, A, Ferrigno, C, Ray, P S, Ducci, L, Jaisawal, G K, Enoto, T, Bozzo, E, Altamirano, D, Di Salvo, T, Strohmayer, T E, Papitto, A, Riggio, A, Burderi, L, Bult, P M, Bogdanov, S, Gambino, A F, Marino, A, Iaria, R, Arzoumanian, Z, Chakrabarty, D, Gendreau, K C, Guillot, S, Markwardt, C & Wolff, M T 2018, ' NuSTAR and NICER reveal IGR J17591-2342 as a new accreting millisecond X-ray pulsar ', Astronomy and Astrophysics, vol. 617, L8 . https://doi.org/10.1051/0004-6361/201834160
arXiv
Astronomy and Astrophysics-A&A, EDP Sciences, 2018, 617, pp.L8. ⟨10.1051/0004-6361/201834160⟩
Astron.Astrophys.
Astron.Astrophys., 2018, 617, pp.L8. ⟨10.1051/0004-6361/201834160⟩
Sanna, A, Ferrigno, C, Ray, P S, Ducci, L, Jaisawal, G K, Enoto, T, Bozzo, E, Altamirano, D, Di Salvo, T, Strohmayer, T E, Papitto, A, Riggio, A, Burderi, L, Bult, P M, Bogdanov, S, Gambino, A F, Marino, A, Iaria, R, Arzoumanian, Z, Chakrabarty, D, Gendreau, K C, Guillot, S, Markwardt, C & Wolff, M T 2018, ' NuSTAR and NICER reveal IGR J17591-2342 as a new accreting millisecond X-ray pulsar ', Astronomy and Astrophysics, vol. 617, L8 . https://doi.org/10.1051/0004-6361/201834160
arXiv
We report the discovery by the Nuclear Spectroscopic Telescope Array (NuSTAR) and the Neutron Star Interior Composition Explorer (NICER) of the accreting millisecond X-ray pulsar IGR J17591-2342. Coherent X-ray pulsations around 527.4 Hz (1.9 ms) wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f97a05732b5ef2cb79694f1f7f6f275
http://hdl.handle.net/10447/338139
http://hdl.handle.net/10447/338139