Results 11 to 20 of about 378,234 (335)

Identification of the optical and quiescent counterparts to the bright X-ray transient in NGC 6440 [PDF]

, 2001
After 3 years of quiescence, the globular cluster NGC 6440 exhibited a bright transient X-ray source turning on in August 2001, as noted with the RXTE All-Sky Monitor.
Asai K., D. Pooley, F. Verbunt, Guainazzi M., J. J. M. in ’t Zand, M. H. van Kerkwijk, Mitsuda K., Ortolani S., R. Wijnands, Verbunt F., W. H. G. Lewin, Zavlin V. E., ’t Zand J. J. M.   +12 more
core   +5 more sources

Variable gamma-ray emission from the Be/X-ray transient A0535+26? [PDF]

, 2001
We present a study of the unidentified gamma-ray source 3EG J0542+2610. This source is spatially superposed to the supernova remnant G180.0-1.7, but its time variability makes unlikely a physical link.
Bernado, M. M. Kaufman, Combi, Jorge A., Romero, Gustavo E., Torres, Diego F.   +3 more
core   +4 more sources

Unveiling Supergiant Fast X‐Ray Transient Sources withINTEGRAL [PDF]

, 2006
Supergiant high-mass X-ray binaries (SGXBs) are believed to be rare objects, as stars in the supergiant phase have a very short lifetime and to date only about a dozen of them have been discovered. They are known to be persistent and bright X-ray sources.
V. Sguera, A. Bazzano, A. J. Bird, Anthony J. Dean, P. Ubertini, E. J. Barlow, L. Bassani, David Clark, A. B. Hill, A. Malizia, M. Molina, J. B. Stephen   +11 more
openalex   +3 more sources

INTEGRAL observations of recurrent fast X-ray transient sources [PDF]

, 2005
Fast X-ray Transients (FXTs) are believed to be non-recurrent bright X-ray sources lasting less than a day and occuring at serendipitous positions, they can best be detected and discovered by instruments having a sufficiently wide field of view and high ...
V. Sguera, E. J. Barlow, A.J. Bird, D.J. Clark, A. J. Dean, A. B. Hill, L. Moran, S.E. Shaw, D. R. Willis, A. Bazzano, P. Ubertini, A. Malizia, V. Sguera, E. J. Barlow, A.J. Bird, D.J. Clark, A. J. Dean, A. B. Hill, L. Moran, S.E. Shaw, D. R. Willis   +20 more
semanticscholar   +5 more sources

ON THE PROPERTIES OF THERMAL DISK WINDS IN X-RAY TRANSIENT SOURCES: A CASE STUDY OF GRO J1655–40 [PDF]

Astrophysical Journal, 2010
We present the results of hydrodynamical simulations of the disk photosphere irradiated by strong X-rays produced in the innermost part of the disk of an accreting black hole.
Stefan Luketic, Daniel Proga, T. R. Kallman, J. C. Raymond, J. M. Mïller   +4 more
openalex   +3 more sources

Extragalactic fast X-ray transient candidates discovered by Chandra (2014-2022) [PDF]

Astronomy & Astrophysics, 2023
Extragalactic fast X-ray transients (FXTs) are short flashes of X-ray photons of unknown origin that last a few minutes to hours. We extend the search for extragalactic FXTs from Quirola et al.
J. Quirola-V'asquez, F. Bauer, P. Jonker, W. Brandt, G. Yang, A. Levan, Y. Xue, D. Eappachen, E. Camacho, M. Ravasio, X. Zheng, B. Luo   +11 more
semanticscholar   +1 more source

Extragalactic fast X-ray transient candidates discovered by Chandra (2000-2014) [PDF]

Astronomy & Astrophysics, 2022
Extragalactic Fast X-ray Transients (FXRTs) are short flashes of X-ray photons spanning a few seconds to hours, with an uncertain origin. Our ignorance about their physical mechanisms and progenitor systems is due in part to the lack of clear multi ...
J. Quirola-Vásquez, F. Bauer, P. Jonker, W. Brandt, G. Yang, A. Levan, Y. Xue, D. Eappachen, X. Zheng, B. Luo   +9 more
semanticscholar   +1 more source

Hard X-ray transient grating spectroscopy on bismuth germanate [PDF]

Nature Photonics, 2021
Optical-domain transient grating (TG) spectroscopy is a versatile background-free four-wave-mixing technique that is used to probe vibrational, magnetic and electronic degrees of freedom in the time domain1.
J. Rouxel, D. Fainozzi, Roman Mankowsky, B. Rösner, G. Seniutinas, R. Mincigrucci, S. Catalini, L. Foglia, R. Cucini, F. Döring, A. Kubec, F. Koch, F. Bencivenga, A. Haddad, A. Gessini, A. Maznev, C. Cirelli, S. Gerber, B. Pedrini, G. Mancini, E. Razzoli, Max Burian, H. Ueda, G. Pamfilidis, E. Ferrari, Yunpei Deng, A. Mozzanica, P. Johnson, D. Ozerov, M. G. Izzo, C. Bottari, C. Arrell, E. Divall, S. Zerdane, M. Sander, G. Knopp, P. Beaud, H. Lemke, C. Milne, C. David, R. Torre, M. Chergui, K. Nelson, C. Masciovecchio, U. Staub, L. Patthey, C. Svetina   +46 more
semanticscholar   +1 more source

The EXTraS project: Exploring the X-ray transient and variable sky [PDF]

Astronomy & Astrophysics, 2021
Temporal variability in flux and spectral shape is ubiquitous in the X-ray sky and carries crucial information about the nature and emission physics of the sources.
A. De Luca, R. Salvaterra, A. Belfiore, S. Carpano, D. D’Agostino, F. Haberl, G. Israel, D. Law-Green, G. Lisini, M. Marelli, G. Novara, A. Read, G. Rodriguez-Castillo, S. Rosen, D. Salvetti, A. Tiengo, G. Vianello, M. Watson, C. Delvaux, T. Dickens, P. Esposito, J. Greiner, H. Hämmerle, A. Kreikenbohm, S. Kreykenbohm, M. Oertel, D. Pizzocaro, J. Pye, S. Sandrelli, B. Stelzer, J. Wilms, F. Zagaria   +31 more
semanticscholar   +1 more source

Models of ultraluminous X-ray transient sources [PDF]

Astronomy & Astrophysics, 2020
Context. It is now widely accepted that most ultraluminous X-ray sources (ULXs) are binary systems whose large (above 1039 erg s−1) apparent luminosities are explained by super-Eddington accretion onto a stellar-mass compact object.
J. Hameury, J. Lasota
semanticscholar   +1 more source