2,285 results on '"Svoboda, J"'
Search Results
2. Blueberry galaxies up to 200 Mpc and their optical and infrared properties
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Kouroumpatzakis, K., Svoboda, J., Zezas, A., Borkar, A., Kyritsis, E., Boorman, P. G., Daoutis, C., Adamcová, B., and Grossová, R.
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Astrophysics - Astrophysics of Galaxies - Abstract
Dwarf highly star-forming galaxies (SFGs) dominated the early Universe and are considered the main driver of its reionization. However, direct observations of these distant galaxies are mainly confined to rest-frame ultraviolet and visible light, limiting our understanding of their complete properties. Therefore, it is still paramount to study their local analogs, the green pea (GP) and blueberry (BB) galaxies. This work aims to expand our knowledge of BBs by identifying a new sample that is closer and in the southern sky. In addition to the already known BBs, this new sample will allow for a statistically significant study of their properties probed by visible and infrared (IR) light. By utilizing the HECATE catalog, which provides photometry and characterization of galaxies, along with data from Pan-STARSS and SDSS, this study selects and analyzes a new sample of BBs. We employed spectral energy distribution fitting to derive homogeneous measurements of star-formation rates and stellar masses. Additionally, we measured emission-line fluxes, including $\rm HeII~\lambda 4686$, through spectral fitting. Through this work, we identified 48 BBs, of which 40 were first recognized as such, with the nearest at 19~Mpc. 14 of the BBs are in the south sky. The BBs tend to be extremely IR red in both WISE $W1-W2$ and $W2-W3$ colors, distinguishing them from typical SFGs. Dwarf SFGs with higher specific star-formation rates tend to have redder IR colors. Blueberry galaxies stand out as the most intensely star-forming sources in the local Universe among dwarf galaxies. They exhibit unique characteristics, such as being intrinsically bluer in visible light, redder in the infrared, and less massive. They also have higher specific star-formation rates, equivalent widths, lower metallicities, and the most strongly ionized interstellar medium compared to typical SFGs and GPs., Comment: 18 pages, 11 + 4 (appendix) figures. Accepted for publication in Astronomy & Astrophysics on 2024-05-02. Updated to match the published version
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- 2024
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3. Recovery of the X-ray polarisation of Swift J1727.8$-$1613 after the soft-to-hard spectral transition
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Podgorný, J., Svoboda, J., Dovčiak, M., Veledina, A., Poutanen, J., Kaaret, P., Bianchi, S., Ingram, A., Capitanio, F., Datta, S. R., Egron, E., Krawczynski, H., Matt, G., Muleri, F., Petrucci, P. -O., Russell, T. D., Steiner, J. F., Bollemeijer, N., Brigitte, M., Segura, N. Castro, Emami, R., García, J. A., Hu, K., Iacolina, M. N., Kravtsov, V., Marra, L., Mastroserio, G., Muñoz-Darias, T., Nathan, E., Negro, M., Ratheesh, A., Cavero, N. Rodriguez, Taverna, R., Tombesi, F., Yang, Y. J., Zhang, W., and Zhang, Y.
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Astrophysics - High Energy Astrophysical Phenomena - Abstract
We report on the detection of X-ray polarisation in the black-hole X-ray binary Swift J1727.8$-$1613 during its dim hard spectral state by the Imaging X-ray Polarimetry Explorer (IXPE). This is the first detection of X-ray polarisation at the transition from the soft to the hard state in an X-ray binary. We find an averaged 2$-$8 keV polarisation degree of (3.3 ${\pm}$ 0.4) % and a corresponding polarisation angle of 3{\deg} ${\pm}$ 4{\deg}, which matches the polarisation detected during the rising stage of the outburst, in September$-$October 2023, within 1${\sigma}$ uncertainty. The observational campaign complements previous studies of this source and enables comparison of the X-ray polarisation properties of a single transient across the X-ray hardness-intensity diagram. The complete recovery of the X-ray polarisation properties, including the energy dependence, came after a dramatic drop in the X-ray polarisation during the soft state. The new IXPE observations in the dim hard state at the reverse transition indicate that the accretion properties, including the geometry of the corona, appear to be strikingly similar to the bright hard state during the outburst rise despite the X-ray luminosities differing by two orders of magnitude., Comment: 8 pages, 6 figures. Accepted for publication in A&A Letters
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- 2024
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4. Timing of accreting neutron stars with future X-ray instruments: towards new constraints on dense matter equation of state
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Karas, V., Klimovicova, K., Lancova, D., Stolc, M., Svoboda, J., Torok, G., Matuszkova, M., Sramkova, E., Sprna, R., and Urbanec, M.
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Astrophysics - High Energy Astrophysical Phenomena ,Physics - Instrumentation and Detectors - Abstract
The Enhanced X-ray Timing and Polarimetry (eXTP) mission is a space mission to be launched in the late 2020s that is currently in development led by China in international collaboration with European partners. Here we provide a progress report on the Czech contribution to the eXTP science. We report on our simulation results performed in Opava (Institute of Physics of the Silesian University in Opava) and Prague (Astronomical Institute of the Czech Academy of Sciences), where the advanced timing capabilities of the satellite have been assessed for bright X-ray binaries that contain an accreting neutron star (NS) and exhibit the quasi-periodic oscillations. Measurements of X-ray variability originating in oscillations of fluid in the innermost parts of the accretion region determined by general relativity, such as the radial or Lense-Thirring precession, can serve for sensitive tests enabling us to distinguish between the signatures of different viable dense matter equations of state. We have developed formulae describing non-geodesic oscillations of accreted fluid and their simplified practical forms that allow for an expeditious application of the universal relations determining the NS properties. These relations, along with our software tools for studying the propagation of light in strong gravity and neutron star models, can be used for precise modeling of the X-ray variability while focusing on properties of the intended Large Area Detector (LAD). We update the status of our program and set up an electronic repository that will provide simulation results and gradual updates as the mission specifications progress toward their final formulation., Comment: 16 pages, 6 figures, proceedings of IBWS conference, eds. Martin Jelinek and Marianna Dafcikova, 22-26 May 2023 (Karlovy Vary, Czech Republic), ISSN: 1336-0337
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- 2024
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5. IXPE observation confirms a high spin in the accreting black hole 4U 1957+115
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Marra, L., Brigitte, M., Cavero, N. Rodriguez, Chun, S., Steiner, J. F., Dovčiak, M., Nowak, M., Bianchi, S., Capitanio, F., Ingram, A., Matt, G., Muleri, F., Podgorný, J., Poutanen, J., Svoboda, J., Taverna, R., Ursini, F., Veledina, A., De Rosa, A., Garcia, J. A., Lutovinov, A. A., Mereminskiy, I. A., Farinelli, R., Gunji, S., Kaaret, P., Kallman, T., Krawczynski, H., Kan, Y., Hu, K., Marinucci, A., Mastroserio, G., Mikušincová, R., Parra, M., Petrucci, P. O., Ratheesh, A., Soffitta, P., Tombesi, F., Zane, S., Agudo, I., Antonelli, L. A., Bachetti, M., Baldini, L., Baumgartner, W. H., Bellazzini, R., Bongiorno, S. D., Bonino, R., Brez, A., Bucciantini, N., Castellano, S., Cavazzuti, E., Chen, C., Ciprini, S., Costa, E., Del Monte, E., Di Gesu, L., Di Lalla, N., Di Marco, A., Donnarumma, I., Doroshenko, V., Ehlert, S. R., Enoto, T., Evangelista, Y., Fabiani, S., Ferrazzoli, R., Hayashida, K., Heyl, J., Iwakiri, W., Jorstad, S. G., Karas, V., Kislat, F., Kitaguchi, T., Kolodziejczak, J. J., La Monaca, F., Latronico, L., Liodakis, I., Maldera, S., Manfreda, A., Marin, F., Marscher, A. P., Marshall, H. L., Massaro, F., Mitsuishi, I., Mizuno, T., Negro, M., Ng, C. Y., O'Dell, S. L., Omodei, N., Oppedisano, C., Papitto, A., Pavlov, G. G., Peirson, A. L., Perri, M., Pesce-Rollins, M., Pilia, M., Possenti, A., Puccetti, S., Ramsey, B. D., Rankin, J., Roberts, O. J., Romani, R. W., Sgro, C., Slane, P., Spandre, G., Swartz, D. A., Tamagawa, T., Tavecchio, F., Tawara, Y., Tennant, A. F., Thomas, N. E., Trois, A., Tsygankov, S. S., Turolla, R., Vink, J., Weisskopf, M. C., Wu, K., and Xie, F.
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Astrophysics - High Energy Astrophysical Phenomena - Abstract
We present the results of the first X-ray polarimetric observation of the low-mass X-ray binary 4U 1957+115, performed with the Imaging X-ray Polarimetry Explorer in May 2023. The binary system has been in a high-soft spectral state since its discovery and is thought to host a black hole. The $\sim$571 ks observation reveals a linear polarisation degree of $1.9\% \pm 0.6\%$ and a polarisation angle of $-41^\circ.8 \pm 7^\circ.9$ in the 2-8 keV energy range. Spectral modelling is consistent with the dominant contribution coming from the standard accretion disc, while polarimetric data suggest a significant role of returning radiation: photons that are bent by strong gravity effects and forced to return to the disc surface, where they can be reflected before eventually reaching the observer. In this setting, we find that models with a black hole spin lower than 0.96 and an inclination lower than $50^\circ$ are disfavoured., Comment: 12 pages, 10 figures, 2 tables, accepted for publication in A&A
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- 2023
6. A note concerning some aspects for application of a thermodynamic extremal principle (TEP) for continua
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Fischer, F. D., Zickler, G. A., Hackl, K., and Svoboda, J.
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- 2024
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7. Mapping the circumnuclear regions of the Circinus galaxy with the Imaging X-ray Polarimetry Explorer
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Ursini, F., Marinucci, A., Matt, G., Bianchi, S., Marin, F., Marshall, H. L., Middei, R., Poutanen, J., Rogantini, D., De Rosa, A., Di Gesu, L., García, J. A., Ingram, A., Kim, D. E., Krawczynski, H., Puccetti, S., Soffitta, P., Svoboda, J., Tombesi, F., Weisskopf, M. C., Barnouin, T., Perri, M., Podgorny, J., Ratheesh, A., Zaino, A., Agudo, I., Antonelli, L. A., Bachetti, M., Baldini, L., Baumgartner, W. H., Bellazzini, R., Bongiorno, S. D., Bonino, R., Brez, A., Bucciantini, N., Capitanio, F., Castellano, S., Cavazzuti, E., Ciprini, S., Costa, E., Del Monte, E., Di Lalla, N., Di Marco, A., Donnarumma, I., Doroshenko, V., Dovčiak, M., Ehlert, S. R., Enoto, T., Evangelista, Y., Fabiani, S., Ferrazzoli, R., Gunji, S., Heyl, J., Iwakiri, W., Jorstad, S. G., Karas, V., Kitaguchi, T., Kolodziejczak, J. J., La Monaca, F., Latronico, L., Liodakis, I., Maldera, S., Manfreda, A., Marscher, A. P., Mitsuishi, I., Mizuno, T., Muleri, F., Ng, C. Y., O'Dell, S. L., Omodei, N., Oppedisano, C., Papitto, A., Pavlov, G. G., Peirson, A. L., Pesce-Rollins, M., Petrucci, P. -O., Pilia, M., Possenti, A., Ramsey, B. D., Rankin, J., Romani, R. W., Sgrò, C., Slane, P., Spandre, G., Tamagawa, T., Tavecchio, F., Taverna, R., Tawara, Y., Tennant, A. F., Thomas, N. E., Trois, A., Tsygankov, S. S., Turolla, R., Vink, J., Wu, K., Xie, F., and Zane, S.
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Astrophysics - High Energy Astrophysical Phenomena - Abstract
We report on the Imaging X-ray Polarimetry Explorer (IXPE) observation of the closest and X-ray brightest Compton-thick active galactic nucleus (AGN), the Circinus galaxy. We find the source to be significantly polarized in the 2--6 keV band. From previous studies, the X-ray spectrum is known to be dominated by reflection components, both neutral (torus) and ionized (ionization cones). Our analysis indicates that the polarization degree is $28 \pm 7$ per cent (at 68 per cent confidence level) for the neutral reflector, with a polarization angle of $18{\deg} \pm 5{\deg}$, roughly perpendicular to the radio jet. The polarization of the ionized reflection is unconstrained. A comparison with Monte Carlo simulations of the polarization expected from the torus shows that the neutral reflector is consistent with being an equatorial torus with a half-opening angle of 45{\deg}-55{\deg}. This is the first X-ray polarization detection in a Seyfert galaxy, demonstrating the power of X-ray polarimetry in probing the geometry of the circumnuclear regions of AGNs, and confirming the basic predictions of standard Unification Models., Comment: 9 pages, accepted for publication in MNRAS, authors list updated
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- 2022
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8. Circumcision--A Victorian Relic Lacking Ethical, Medical, or Legal Justification
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Svoboda, J. Steven
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- 2003
9. Innovative approaches to neutron beam optimization: A case study of FP14 at LANSCE
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Svoboda, J., Broughton, D.P., Mocko, M.J., Cooper, A.L., Couture, A., DiGiovine, B., Kuvin, S.A., Leal-Cidoncha, E., Lee, H.Y., and Zavorka, L.
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- 2024
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10. Interpretations of Spectra
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Katzarkov, L., Lee, K. S., Svoboda, J., Petkov, A., Cheltsov, Ivan, editor, Chen, Xiuxiong, editor, Katzarkov, Ludmil, editor, and Park, Jihun, editor
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- 2023
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11. A combined timing/spectral study of IRAS 13224-3809 using XMM-Newton data
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Caballero-Garcia, M. D., Papadakis, I. E., Dovciak, M., Bursa, M., Svoboda, J., and Karas, V.
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Astrophysics - High Energy Astrophysical Phenomena - Abstract
We present the results from an X-ray variability study of IRAS 13224-3809. This is probably the best source for X-ray reverberation studies since it is X-ray bright, extremely variable, and it has been extensively observed with XMM-Newton. We used all the archival XMM-Newton data from the three EPIC cameras (to increase the signal-to-noise) and, given the many observations of the source, we were able to compute the time-lags spectra in three different flux levels/periods. We fitted the time-lags and energy spectra, simultaneously, using a new X-ray reverberation code which computes the time dependent reflection spectra of the disc as a response to an X-ray flash from a point source located on the axis of the black-hole (BH) accretion disc (lamp-post geometry). To the best of our knowledge, this is the first time for an AGN that both time-lags and energy spectra are fitted by a model simultaneously in different flux periods. The model fits in the case when the BH is rapidly rotating are significantly better than the model fits in the case of a Schwarzschild BH. This result strongly favours the hypothesis of a rotating central BH in this source. We also detect significant variations in the height of the X-ray corona. The X-ray height appears to increase from 3-5 gravitational radii when the X-ray luminosity is of the order of 1.5-3 percent of the Eddington limit, up to 10 gravitational radii, when the luminosity doubles., Comment: Accepted for publication in MNRAS (18th Aug. 2020)
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- 2020
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12. Plasma diagnostics using fast cameras at the GOLEM tokamak
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Abbasi, S., Chlum, J., Mlynar, J., Svoboda, V., Svoboda, J., and Brotankova, J.
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- 2023
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13. Recovery of the X-ray polarisation of Swift J1727.8−1613 after the soft-to-hard spectral transition
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Podgorný, J., primary, Svoboda, J., additional, Dovčiak, M., additional, Veledina, A., additional, Poutanen, J., additional, Kaaret, P., additional, Bianchi, S., additional, Ingram, A., additional, Capitanio, F., additional, Datta, S. R., additional, Egron, E., additional, Krawczynski, H., additional, Matt, G., additional, Muleri, F., additional, Petrucci, P.-O., additional, Russell, T. D., additional, Steiner, J. F., additional, Bollemeijer, N., additional, Brigitte, M., additional, Castro Segura, N., additional, Emami, R., additional, García, J., additional, Hu, K., additional, Iacolina, M. N., additional, Kravtsov, V., additional, Marra, L., additional, Mastroserio, G., additional, Muñoz-Darias, T., additional, Nathan, E., additional, Negro, M., additional, Ratheesh, A., additional, Rodriguez Cavero, N., additional, Taverna, R., additional, Tombesi, F., additional, Yang, Y. J., additional, Zhang, W., additional, and Zhang, Y., additional
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- 2024
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14. Direct consolidation of an oxide dispersion strengthened alloy by hot rotary swaging
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Kunčická, L., primary and Svoboda, J., additional
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- 2024
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15. Mechanisms of plastic deformation and fracture in coarse grained Fe–10Al–4Cr–4Y2O3 ODS nanocomposite at 20–1300°C
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Gamanov, Š., Luptáková, N., Bořil, P., Jarý, M., Mašek, B., Dymáček, P., and Svoboda, J.
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- 2023
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16. Optical Coherence Tomography Can Predict Visual Acuity in Children with Optic Nerve Hypoplasia
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Skriapa-Manta A, Nilsson M, Svoboda J, Olsson M, and Teär Fahnehjelm K
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optic nerve hypoplasia ,oct ,ganglion cell complex ,rnfl ,visual fields ,paediatric ophthalmology ,Ophthalmology ,RE1-994 - Abstract
Athanasia Skriapa-Manta,1,2 Mattias Nilsson,1 Jan Svoboda,3 Monica Olsson,1,2 Maria Nilsson,4 Kristina Teär Fahnehjelm1,2 1Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden; 2Department of Paediatric Ophthalmology, Strabismus and Electrophysiology, St. Erik Eye Hospital, Stockholm, Sweden; 3Department of Paediatric Radiology, Karolinska University Hospital, Stockholm, Sweden; 4Unit of Optometry, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, SwedenCorrespondence: Athanasia Skriapa-Manta, St Erik Eye Hospital, Eugeniavägen 12, Stockholm, 17164, Sweden, Tel +46 739 491 186, Email athanasia.skriapa-manta@ki.sePurpose: Optic nerve hypoplasia (ONH) is a common cause of visual impairment in children. Clinical complexity can cause diagnostic delay and difficulties predicting visual outcome. We evaluated whether optical coherence tomography (OCT) can improve the diagnosis and prediction of vision.Methods: Thirty-seven eyes with ONH from 12 girls and 8 boys, median age 10.5 years (range 2.8– 18.9 years), were included in this cross-sectional cohort study. The majority, 17/20, had bilateral ONH. Ophthalmological assessments included best corrected visual acuity (BCVA), fundus photography, measurement of the peripapillary retinal nerve fibre layer (pRNFL), macular ganglion cell complex (GCC), Bruch’s membrane opening (BMO) and visual fields. We compared OCT parameters with comparison data collected on 140 healthy individuals 5 to 25 years old. Pearson’s correlation coefficient was used to determine the correlation of OCT parameters and BCVA.Results: OCT demonstrated thinner mean pRNFL (p < 0.001) and mean GCC compared to the reference material (p < 0.001). BCVA displayed a strong or moderate correlation to pRNFL and to all sectors of the GCC except the inferotemporal. BCVA correlated strongly to Bruch’s membrane opening (BMO) (0.71, p < 0.001), and moderately to the Zeki ratio (− 0.52, p < 0.001). Multivariate analyses showed that BMO explained 48% of the variance in BCVA. Visual fields correlated strongly to pRNFL and GCC thickness. GCC thinning corresponded to visual field defects presence and location.Conclusion: OCT can facilitate the diagnosis of ONH. Parameters such as pRNFL, GCC and BMO can be predictors of visual acuity whereas GCC and pRNFL thinning can indicate location and severity of visual field defects.Keywords: optic nerve hypoplasia, OCT, ganglion cell complex, RNFL, visual fields, paediatric ophthalmology
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- 2022
17. Kinetic Modeling of Grain Boundary Cementite Evolution
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Vogric, M., Kozeschnik, E., Svoboda, J., Führer, M., Kreyca, J., Wei, W., and Povoden-Karadeniz, E.
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- 2022
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18. Study of Photonuclear Reactions in 165Ho Nucleus at the LINAC-200 Accelerator
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Khushvaktov, J. H., Stegailov, V. I., Adam, J., Kobets, V. V., Solnyshkin, A. A., Svoboda, J., Teterev, Yu. G., Tichy, P., Tyutyunnikov, S. I., Vrzalova, J., Yuldashev, B. S., and Zeman, M.
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- 2022
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19. Steep X-ray reflection emissivity profiles in AGN as the result of radially-structured disc ionisation
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Kammoun, E. S., Domcek, V., Svoboda, J., Dovciak, M., and Matt, G.
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Astrophysics - High Energy Astrophysical Phenomena - Abstract
X-ray observations suggest high compactness of coronae in active galactic nuclei as well as in X-ray binaries. The compactness of the source implies a strong radial dependence in the illumination of the accretion disc. This will, for any reasonable radial profile of the density, lead to a radial profile of the disc ionisation. Svoboda et al. (2012) showed on a single example that assuming a radially-structured ionisation profile of the disc can cause an artificial increase of the radial-emissivity parameter. We further investigate how the X-ray spectra are modified and quantify this effect for a wide range of parameters. Computations are carried out with the current state-of-the-art models for relativistic reflection. We simulated spectra using the response files of the micro-calorimeter X-IFU, which is planned to be on board of Athena. We assumed typical parameters for X-ray bright Seyfert-1 galaxies and considered two scenarios for the disc ionisation: 1) a radial profile for the disc ionisation, 2) a constant disc ionisation. We found that steep emissivity profiles can be indeed achieved due to the radial profile of the disc ionisation, which becomes more important for the cases where the corona is located at low heights above the black hole and this effect may be even more prominent than the geometrical effects. We also found that the cases with high inner disc ionisation, rapidly decreasing with radius, may result in an inaccurate black hole spin measurements., Comment: Accepted for publication in MNRAS
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- 2019
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20. Processing window for hot consolidation by rolling and rotary swaging of Fe-10Al-4Cr-4Y2O3 ODS nanocomposite
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Svoboda, J., Kocich, R., Gamanov, Š., Kunčická, L., Luptáková, N., and Dymáček, P.
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- 2023
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21. Testing the X-ray reverberation model KYNREFREV in a sample of Seyfert 1 Active Galactic Nuclei
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Caballero-Garcia, M. D., Papadakis, I. E., Dovciak, M., Bursa, M., Epitropakis, A., Karas, V., and Svoboda, J.
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Astrophysics - High Energy Astrophysical Phenomena - Abstract
We present the first results obtained by the application of the KYNREFREV-reverberation model, which is ready for its use in XSPEC. This model computes the time dependent reflection spectra of the disc as a response to a flash of primary power-law radiation from a point source corona located on the axis of the black hole accretion disc (lamp-post geometry). Full relativistic effects are taken into account. The ionisation of the disc is set for each radius according to the amount of the incident primary flux and the density of the accretion disc. We tested the model by fitting model predictions to the observed time-lag spectra of three Narrow-Line Seyfert 1 galaxies (ARK 564, MCG-6-30-15 and 1H 0707-495), assuming either a rapidly or zero spinning black hole (BH). The time-lags strongly suggest a compact X-ray source, located close to the BH, at a height of approx. 4 gravitational radii. This result does not depend either on the BH spin or the disc ionization. There is no significant statistical difference between the quality of the best-fits in the rapidly and zero spinning BH scenarios in Ark 564 and MCG-6-30-15. But there is an indication that the hypothesis of a non-rotating BH in 1H 0707-495 is not consistent with its time-lag spectrum. Finally, the best-fits to the Ark 564 and 1H 0707-495 data are of rather low quality. We detect wavy-residuals around the best-fit reverberation model time-lags at high frequencies. This result suggests that the simple lamp-post geometry does not fully explain the X-ray source/disc configuration in Active Galactic Nuclei., Comment: Accepted in MNRAS after minor revision (23/Jul./2018). 10 pages
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- 2018
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22. Bendamustine is safe and effective for lymphodepletion before tisagenlecleucel in patients with refractory or relapsed large B-cell lymphomas
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Ghilardi, G., Chong, E.A., Svoboda, J., Wohlfarth, P., Nasta, S.D., Williamson, S., Landsburg, J.D., Gerson, J.N., Barta, S.K., Pajarillo, R., Myers, J., Chen, A.I., Schachter, L., Yelton, R., Ballard, H.J., Hodges Dwinal, A., Gier, S., Victoriano, D., Weber, E., Napier, E., Garfall, A., Porter, D.L., Jäger, U., Maziarz, R.T., Ruella, M., and Schuster, S.J.
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- 2022
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23. Generalization of classical Hillert's grain growth and LSW theories to a wide family of kinetic evolution equations and stationary distribution functions
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Svoboda, J., Zickler, G.A., Kozeschnik, E., and Fischer, F.D.
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- 2022
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24. Thermodynamic trapping and diffusion model for multiple species in systems with multiple sorts of traps
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Leitner, S., Ecker, W., Fischer, F.D., and Svoboda, J.
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- 2022
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25. Strain and interface energy of ellipsoidal inclusions subjected to volumetric eigenstrains: shape factors
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Böhm, H. J., Zickler, G. A., Fischer, F. D., and Svoboda, J.
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- 2022
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26. KYNREFREV - implementation of an X-ray reverberation model in XSPEC
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Caballero-Garcia, M. D., Dovciak, M., Papadakis, I., Epitropakis, A., Svoboda, J., Kara, E., and Karas, V.
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Astrophysics - High Energy Astrophysical Phenomena - Abstract
We present briefly the first results obtained by the application of the KYNREFREV-reverberation model, which is ready for its use in XSPEC. This model computes the time dependent reflection spectra of the disc as a response to a flash of primary power-law radiation from a point source corona located on the axis of the black-hole accretion disc. The assumptions of the model are: central Kerr black hole, surrounded by a Keplerian, geometrically thin, optically thick, ionised disc with the possibility of defining the radial density profile and a stationary hot point-like patch of plasma located on the system rotation axis and emitting isotropic power-law radiation (lamp-post geometry). Full relativistic ray-tracing code in vacuum is used for photon paths from the corona to the disc and to the observer and from the disc to the observer. The ionisation of the disc is set for each radius according to the amount of the incident primary flux and the density of the accretion disc. In this paper we comment on some preliminary results obtained through the analysis of X-ray reverberation time-lags from 1H 0707-495 and IRAS 13224-3809., Comment: 10 pages, 5 figures and 2 tables. Submitted to Proceedings of Science ("APCS2016: Accretion Processes in Cosmic Sources" held at S. Petersburg, Eds. Franco Giovannelli & Lola Sabau-Graziati)
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- 2017
27. Preliminary design of the COMPASS upgrade tokamak
- Author
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Vondracek, P., Panek, R., Hron, M., Havlicek, J., Weinzettl, V., Todd, T., Tskhakaya, D., Cunningham, G., Hacek, P., Hromadka, J., Junek, P., Krbec, J., Patel, N., Sestak, D., Varju, J., Adamek, J., Balazsova, M., Balner, V., Barton, P., Bielecki, J., Bilkova, P., Błocki, J., Bocian, D., Bogar, K., Bogar, O., Boocz, P., Borodkina, I., Brooks, A., Bohm, P., Burant, J., Casolari, A., Cavalier, J., Chappuis, P., Dejarnac, R., Dimitrova, M., Dudak, M., Duran, I., Ellis, R., Entler, S., Fang, J., Farnik, M., Ficker, O., Fridrich, D., Fukova, S., Gerardin, J., Hanak, I., Havranek, A., Herrmann, A., Horacek, J., Hronova, O., Imrisek, M., Isernia, N., Jaulmes, F., Jerab, M., Kindl, V., Komm, M., Kovarik, K., Kral, M., Kripner, L., Macusova, E., Majer, T., Markovic, T., Matveeva, E., Mikszuta-Michalik, K., Mohelnik, M., Mysiura, I., Naydenkova, D., Nemec, I., Ortwein, R., Patocka, K., Peterka, M., Podolnik, A., Prochazka, F., Prevratil, J., Reboun, J., Scalera, V., Scholz, M., Svoboda, J., Swierblewski, J., Sos, M., Tadros, M., Titus, P., Tomes, M., Torres, A., Tracz, G., Turjanica, P., Varavin, M., Veselovsky, V., Villone, F., Wąchal, P., Yanovskiy, V., Zadvitskiy, G., Zajac, J., Zak, A., Zaloga, D., Zelda, J., and Zhang, H.
- Published
- 2021
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28. Serum Biomarkers Of Hypoxic-Ischemic Brain Injury
- Author
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TEFR FARIDOVÁ, A, primary, HEŘMAN, H, additional, DANAČÍKOVÁ, Š, additional, SVOBODA, J, additional, and OTÁHAL, J, additional
- Published
- 2023
- Full Text
- View/download PDF
29. Timing of accreting neutron stars with future X-ray instruments: towards new constraints on dense matter equation of state
- Author
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Karas, V., primary, Klimovičová, K., additional, Lančová, D., additional, Štolc, M., additional, Svoboda, J., additional, Török, G., additional, Matuszková, M., additional, Šrámková, E., additional, Šprňa, R., additional, and Urbanec, M., additional
- Published
- 2023
- Full Text
- View/download PDF
30. Conceptual design of tomographic soft X-ray detectors for COMPASS-U tokamak
- Author
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Svoboda, J, Imrisek, M, Mikszuta-Michalik, K, Mlynar, J, Ficker, O, Bilkova, P, Weinzettl, V, Jaulmes, F, Hron, M, and Panek, R
- Published
- 2021
- Full Text
- View/download PDF
31. Direct probe of the inner accretion flow around the supermassive black hole in NGC 2617
- Author
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Giustini, M., Costantini, E., De Marco, B., Svoboda, J., Motta, S. E., Proga, D., Saxton, R., Ferrigno, C., Longinotti, A. L., Miniutti, G., Grupe, D., Mathur, S., Shappee, B. J., Prieto, J. L., and Stanek, K.
- Subjects
Astrophysics - Astrophysics of Galaxies ,Astrophysics - High Energy Astrophysical Phenomena - Abstract
NGC 2617 is a nearby ($z\sim 0.01$) active galaxy that recently switched from being a Seyfert 1.8 to be a Seyfert 1.0. At the same time, it underwent a strong increase of X-ray flux by one order of magnitude with respect to archival measurements. We characterise the X-ray spectral and timing properties of NGC 2617 with the aim of studying the physics of a changing-look active galactic nucleus (AGN). We performed a comprehensive timing and spectral analysis of two XMM-Newton pointed observations spaced by one month, complemented by archival quasi-simultaneous INTEGRAL observations. We found that, to the first order, NGC 2617 looks like a type 1 AGN in the X-ray band and, with the addition of a modest reflection component, its continuum can be modelled well either with a power law plus a phenomenological blackbody, a partially covered power law, or a double Comptonisation model. Independent of the continuum adopted, in all three cases a column density of a few $10^{23}$ cm$^{-2}$ of neutral gas covering 20-40\% of the continuum source is required by the data. Most interestingly, absorption structures due to highly ionised iron have been detected in both observations with a redshift of about $0.1c$ with respect to the systemic redshift of the host galaxy. The redshifted absorber can be ascribed to a failed wind/aborted jets component, to gravitational redshift effects, and/or to matter directly falling towards the central supermassive black hole. In either case, we are probing the innermost accretion flow around the central supermassive black hole of NGC 2617 and might be even watching matter in a direct inflow towards the black hole itself., Comment: Replaced to match the published version
- Published
- 2016
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32. eXTP -- enhanced X-ray Timing and Polarimetry Mission
- Author
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Zhang, S. N., Feroci, M., Santangelo, A., Dong, Y. W., Feng, H., Lu, F. J., Nandra, K., Wang, Z. S., Zhang, S., Bozzo, E., Brandt, S., De Rosa, A., Gou, L. J., Hernanz, M., van der Klis, M., Li, X. D., Liu, Y., Orleanski, P., Pareschi, G., Pohl, M., Poutanen, J., Qu, J. L., Schanne, S., Stella, L., Uttley, P., Watts, A., Xu, R. X., Yu, W. F., Zand, J. J. M. in 't, Zane, S., Alvarez, L., Amati, L., Baldini, L., Bambi, C., Basso, S., Bhattacharyya, S., Bellazzini, R., Belloni, T., Bellutti, P., Bianchi, S., Brez, A., Bursa, M., Burwitz, V., Budtz-Jorgensen, C., Caiazzo, I., Campana, R., Cao, X. L., Casella, P., Chen, C. Y., Chen, L., Chen, T. X., Chen, Y., Chen, Y. P., Civitani, M., Zelati, F. Coti, Cui, W., Cui, W. W., Dai, Z. G., Del Monte, E., De Martino, D., Di Cosimo, S., Diebold, S., Dovciak, M., Donnarumma, I., Doroshenko, V., Esposito, P., Evangelista, Y., Favre, Y., Friedrich, P., Fuschino, F., Galvez, J. L., Gao, Z. L., Ge, M. Y., Gevin, O., Goetz, D., Han, D. W., Heyl, J., Horak, J., Hu, W., Huang, F., Huang, Q. S., Hudec, R., Huppenkothen, D., Israel, G. L., Ingram, A., Karas, V., Karelin, D., Jenke, P. A., Ji, L., Kennedy, T., Korpela, S., Kunneriath, D., Labanti, C., Li, G., Li, X., Li, Z. S., Liang, E. W., Limousin, O., Lin, L., Ling, Z. X., Liu, H. B., Liu, H. W., Liu, Z., Lu, B., Lund, N., Lai, D., Luo, B., Luo, T., Ma, B., Mahmoodifar, S., Marisaldi, M., Martindale, A., Meidinger, N., Men, Y. P., Michalska, M., Mignani, R., Minuti, M., Motta, S., Muleri, F., Neilsen, J., Orlandini, M., Pan, A T., Patruno, A., Perinati, E., Picciotto, A., Piemonte, C., Pinchera, M., Rachevski, A., Rapisarda, M., Rea, N., Rossi, E. M. R., Rubini, A., Sala, G., Shu, X. W., Sgro, C., Shen, Z. X., Soffitta, P., Song, L. M., Spandre, G., Stratta, G., Strohmayer, T. E., Sun, L., Svoboda, J., Tagliaferri, G., Tenzer, C., Tong, H., Taverna, R., Torok, G., Turolla, R., Vacchi, A., Wang, J., Wang, J. X., Walton, D., Wang, K., Wang, J. F., Wang, R. J., Wang, Y. F., Weng, S. S., Wilms, J., Winter, B., Wu, X., Wu, X. F., Xiong, S. L., Xu, Y. P., Xue, Y. Q., Yan, Z., Yang, S., Yang, X., Yang, Y. J., Yuan, F., Yuan, W. M., Yuan, Y. F., Zampa, G., Zampa, N., Zdziarski, A., Zhang, C., Zhang, C. L., Zhang, L., Zhang, X., Zhang, Z., Zhang, W. D., Zheng, S. J., Zhou, P., and Zhou, X. L.
- Subjects
Astrophysics - Instrumentation and Methods for Astrophysics ,Astrophysics - High Energy Astrophysical Phenomena - Abstract
eXTP is a science mission designed to study the state of matter under extreme conditions of density, gravity and magnetism. Primary targets include isolated and binary neutron stars, strong magnetic field systems like magnetars, and stellar-mass and supermassive black holes. The mission carries a unique and unprecedented suite of state-of-the-art scientific instruments enabling for the first time ever the simultaneous spectral-timing-polarimetry studies of cosmic sources in the energy range from 0.5-30 keV (and beyond). Key elements of the payload are: the Spectroscopic Focusing Array (SFA) - a set of 11 X-ray optics for a total effective area of about 0.9 m^2 and 0.6 m^2 at 2 keV and 6 keV respectively, equipped with Silicon Drift Detectors offering <180 eV spectral resolution; the Large Area Detector (LAD) - a deployable set of 640 Silicon Drift Detectors, for a total effective area of about 3.4 m^2, between 6 and 10 keV, and spectral resolution <250 eV; the Polarimetry Focusing Array (PFA) - a set of 2 X-ray telescope, for a total effective area of 250 cm^2 at 2 keV, equipped with imaging gas pixel photoelectric polarimeters; the Wide Field Monitor (WFM) - a set of 3 coded mask wide field units, equipped with position-sensitive Silicon Drift Detectors, each covering a 90 degrees x 90 degrees FoV. The eXTP international consortium includes mostly major institutions of the Chinese Academy of Sciences and Universities in China, as well as major institutions in several European countries and the United States. The predecessor of eXTP, the XTP mission concept, has been selected and funded as one of the so-called background missions in the Strategic Priority Space Science Program of the Chinese Academy of Sciences since 2011. The strong European participation has significantly enhanced the scientific capabilities of eXTP. The planned launch date of the mission is earlier than 2025., Comment: 16 pages, 16 figures. Oral talk presented at SPIE Astronomical Telescopes and Instrumentation, June 26 to July 1, 2016, Edingurgh, UK
- Published
- 2016
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33. The nature of the torus in the heavily obscured AGN Markarian 3: an X-ray study
- Author
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Guainazzi, M., Risaliti, G., Awaki, H., Arevalo, P., Bauer, F. E., Bianchi, S., Boggs, S. E., Brandt, W. N., Brightman, M., Christensen, F. E., Craig, W. W., Forster, K., Hailey, C. J., Harrison, F., Koss, M., Longinotti, A., Markwardt, C., Marinucci, A., Matt, G., Reynolds, C. S., Ricci, C., Stern, D., Svoboda, J., Walton, D., and Zhang, W.
- Subjects
Astrophysics - High Energy Astrophysical Phenomena - Abstract
In this paper we report the results of an X-ray monitoring campaign on the heavily obscured Seyfert galaxy Markarian 3 carried out between the fall of 2014 and the spring of 2015 with NuSTAR, Suzaku and XMM-Newton. The hard X-ray spectrum of Markarian 3 is variable on all the time scales probed by our campaign, down to a few days. The observed continuum variability is due to an intrinsically variable primary continuum seen in transmission through a large, but still Compton-thin column density (N_H~0.8-1.1$\times$10$^{24}$ cm$^{-2}$). If arranged in a spherical-toroidal geometry, the Compton scattering matter has an opening angle ~66 degrees and is seen at a grazing angle through its upper rim (inclination angle ~70 degrees). We report a possible occultation event during the 2014 campaign. If the torus is constituted by a system of clouds sharing the same column density, this event allows us to constrain their number (17$\pm$5) and individual column density, [~(4.9$\pm$1.5)$\times$10$^{22}$ cm$^{-2}$]. The comparison of IR and X-ray spectroscopic results with state-of-the art "torus" models suggests that at least two thirds of the X-ray obscuring gas volume might be located within the dust sublimation radius. We report also the discovery of an ionized absorber, characterised by variable resonant absorption lines due to He- and H-like iron. This discovery lends support to the idea that moderate column density absorbers could be due to clouds evaporated at the outer surface of the torus, possibly accelerated by the radiation pressure due to the central AGN emission leaking through the patchy absorber., Comment: Accepted for publication in MNRAS, 17 pages, 11 figures, 5 tables
- Published
- 2016
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34. The Effect of Sulphoraphane on Brain Glucose Uptake during Neonatal Hypoxic-Ischemic Encephalopathy in Newborn Rats
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Kapoor S., Kala D., Svoboda J., Brnoliakova Z., and Otahal J.
- Subjects
hypoxic-ischemic insult ,18f-fdg (fluorodeoxyglucose) activity ,oxidative stress ,glucose metabolism ,sulforaphane ,Therapeutics. Pharmacology ,RM1-950 - Abstract
Neonatal hypoxic-ischemic insult (HII) is one of the leading causes of morbidity and mortality in newborns. It has long-term consequences and represents a socioeconomic burden. It is an urgent issue in current neonatology. The aim of the present pilot study was to evaluate the possible effect of sulforaphane on brain glucose uptake expressed as 18F-fluorodeoxyglucose (18F-FDG) activity at the acute, subacute, and subchronic time intervals after the experimental perinatal HII in rats. Significant protection has been observed in the hippocampus 5 weeks after the insult as represented by normalisations of interhemispheric ratio of measured 18F-FDG activity. In conclusion, positron emission tomography (PET) with 18F-FDG revealed a protective effect of SFN on glucose metabolism in the subchronic phase after HII. Further research within the field of neonatal HII in newborn rats will be necessary.
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- 2021
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35. Role of elastic strain energy in spheroidal precipitates revisited
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Böhm, H.J., Zickler, G.A., Fischer, F.D., and Svoboda, J.
- Published
- 2021
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36. Rate effects on the undrained shear strength of compacted clay
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Mun, W, Teixeira, T, Balci, MC, Svoboda, J, and McCartney, JS
- Subjects
Soil Sciences ,Civil Engineering ,Other Engineering ,Geological & Geomatics Engineering - Published
- 2016
37. Accretion, ejection and reprocessing in supermassive black holes
- Author
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De Rosa, A., Bianchi, S., Giroletti, M., Marinucci, A., Paolillo, M., Papadakis, I., Risaliti, G., Tombesi, F., Cappi, M., Czerny, B., Dadina, M., De Marco, B., Dovciak, M., Karas, V., Kunneriath, D., La Franca, F., Manousakis, A., Markowitz, A., McHardy, I., Mehdipour, M., Miniutti, G., Paltani, S., Perez-Torres, M., Peterson, B., Piconcelli, E., Petrucci, P. O., Ponti, G., Rozanska, A., Salvati, M., Sobolewska, M., Svoboda, J., Trevese, D., Uttley, P., Vagnetti, F., Vaughan, S., Vignali, C., Vincent, F. H., and Zdziarski, A.
- Subjects
Astrophysics - High Energy Astrophysical Phenomena - Abstract
This is a White Paper in support of the mission concept of the Large Observatory for X-ray Timing (LOFT), proposed as a medium-sized ESA mission. We discuss the potential of LOFT for the study of active galactic nuclei. For a summary, we refer to the paper., Comment: White Paper in Support of the Mission Concept of the Large Observatory for X-ray Timing
- Published
- 2015
38. On the treatment of non-reciprocal rate-independent kinetics via thermodynamic extremal principles
- Author
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Hackl, K., Fischer, F.D., and Svoboda, J.
- Published
- 2020
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39. Cycled hydrogen permeation through Armco iron – A joint experimental and modeling approach
- Author
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Drexler, A., Siegl, W., Ecker, W., Tkadletz, M., Klösch, G., Schnideritsch, H., Mori, G., Svoboda, J., and Fischer, F.D.
- Published
- 2020
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40. Study of the Rate of Photonuclear Reactions in 165Ho Nucleus
- Author
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Khushvaktov, J. H., Stegailov, V. I., Adam, J., Kobets, V. V., Solnyshkin, A. A., Svoboda, J., Teterev, Yu. G., Tichy, P., Tsoupko-Sitnikov, V. M., Tyutyunnikov, S. I., Vrzalova, J., Yuldashev, B. S., and Zeman, M.
- Published
- 2020
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41. Study of the residual nuclei generation in a massive lead target irradiated with 660 MeV protons
- Author
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Khushvaktov, J.H., Tichý, P., Adam, J., Baldin, A.A., Baznat, M., Brunčiaková, M., Furman, W.I., Gustov, S.A., Král, D., Solnyshkin, A.A., Stegailov, V.I., Svoboda, J., Tsoupko-Sitnikov, V.M., Tyutyunnikov, S.I., Vespalec, R., Vrzalová, J., Wagner, V., Yudin, I.P., Yuldashev, B.S., Závorka, L., and Zeman, M.
- Published
- 2020
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42. Local approach for coarsening of precipitates
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Svoboda, J., Shan, Y.V., Zickler, G.A., Kozeschnik, E., and Fischer, F.D.
- Published
- 2020
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43. On solute depletion zones along grain boundaries during segregation
- Author
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Scheiber, D., Jechtl, T., Svoboda, J., Fischer, F.D., and Romaner, L.
- Published
- 2020
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44. XIPE: the x-ray imaging polarimetry explorer
- Author
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Soffitta, Paolo, Bellazzini, Ronaldo, Bozzo, Enrico, Burwitz, Vadim, Castro Tirado, Alberto, Costa, Enrico, Courvoisier, Thierry, Feng, Hua, Gburek, Szymon, Goosmann, Rene', Karas, Vladimir, Matt, Giorgio, Muleri, Fabio, Nandra, Kirpal, Pearce, Mark, Poutanen, Juri, Reglero, Victor, Graziati, Maria Dolores, Santangelo, Andrea, Tagliaferri, Gianpiero, Tenzer, Christopher, Vink, Jacco, Weisskopf, Martin, Zane, Silvia, Agudo, I, Antonelli, A, Attina, P, Baldini, L, Bykov, A, Carpentiero, R, Cavazzuti, E, Churazov, E, Del Monte, E, De Martino, D, Donnarumma, I, Doroshenko, V, Evangelista, Y, Ferreira, I, Gallo, E, Grosso, N, Kaaret, P, Kuulkers, E, Laranaga, J, Latronico, L, Lumb, DH, Macian, J, Malzac, J, Marin, F, Massaro, E, Minuti, M, Mundell, C, Ness, JU, Oosterbroek, T, Paltani, S, Pareschi, G, Perna, R, Petrucci, P-O, Pinazo, HB, Pinchera, M, Rodriguez, JP, Roncadelli, M, Santovincenzo, A, Sazonov, S, Sgro, C, Spiga, D, Svoboda, J, Theobald, C, Theodorou, T, Turolla, R, Wilhelmi de Ona, E, Winter, B, Akbar, AM, Allan, H, Aloisio, R, Altamirano, D, Amati, L, Amato, E, Angelakis, E, Arezu, J, Atteia, J-L, Axelsson, M, Bachetti, M, Ballo, L, Balman, S, Bandiera, R, Barcons, X, Basso, S, Baykal, A, Becker, W, Behar, E, Beheshtipour, B, Belmont, R, Berger, E, Bernardini, F, Bianchi, S, Bisnovatyi-Kogan, G, Blasi, P, Blay, P, Bodaghee, A, and Boer, M
- Subjects
X-ray Astronomy ,Polarimetry ,X-ray optics ,Gas Pixel Detector - Abstract
XIPE, the X-ray Imaging Polarimetry Explorer, is a mission dedicated to X-ray Astronomy. At the time of writing XIPE is in a competitive phase A as fourth medium size mission of ESA (M4). It promises to reopen the polarimetry window in high energy Astrophysics after more than 4 decades thanks to a detector that efficiently exploits the photoelectric effect and to X-ray optics with large effective area. XIPE uniqueness is time-spectrally-spatially-resolved X-ray polarimetry as a breakthrough in high energy astrophysics and fundamental physics. Indeed the payload consists of three Gas Pixel Detectors at the focus of three X-ray optics with a total effective area larger than one XMM mirror but with a low weight. The payload is compatible with the fairing of the Vega launcher. XIPE is designed as an observatory for X-ray astronomers with 75 % of the time dedicated to a Guest Observer competitive program and it is organized as a consortium across Europe with main contributions from Italy, Germany, Spain, United Kingdom, Poland, Sweden.
- Published
- 2016
45. XIPE: The X-ray imaging polarimetry explorer
- Author
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Soffitta, P, Bellazzini, R, Bozzo, E, Burwitz, V, Castro-Tirado, AJ, Costa, E, Courvoisier, T, Feng, H, Gburek, S, Goosmann, R, Karas, V, Matt, G, Muleri, F, Nandra, K, Pearce, M, Poutanen, J, Reglero, V, Sabau Maria, D, Santangelo, A, Tagliaferri, G, Tenzer, C, Vink, J, Weisskopf, MC, Zane, S, Agudo, I, Antonelli, A, Attina, P, Baldini, L, Bykov, A, Carpentiero, R, Cavazzuti, E, Churazov, E, Del Monte, E, De Martino, D, Donnarumma, I, Doroshenko, V, Evangelista, Y, Ferreira, I, Gallo, E, Grosso, N, Kaaret, P, Kuulkers, E, Laranaga, J, Latronico, L, Lumb, DH, Macian, J, Malzac, J, Marin, F, Massaro, E, Minuti, M, Mundell, C, Ness, JU, Oosterbroek, T, Paltani, S, Pareschi, G, Perna, R, Petrucci, PO, Pinazo, HB, Pinchera, M, Rodriguez, JP, Roncadelli, M, Santovincenzo, A, Sazonov, S, Sgro, C, Spiga, D, Svoboda, J, Theobald, C, Theodorou, T, Turolla, R, Wilhelmi De Ona, E, Winter, B, Akbar, AM, Allan, H, Aloisio, R, Altamirano, D, Amati, L, Amato, E, Angelakis, E, Arezu, J, Atteia, JL, Axelsson, M, Bachetti, M, Ballo, L, Balman, S, Bandiera, R, Barcons, X, Basso, S, Baykal, A, Becker, W, Behar, E, Beheshtipour, B, Belmont, R, Berger, E, Bernardini, F, Bianchi, S, Bisnovatyi-Kogan, G, Blasi, P, Blay, P, Bodaghee, A, and Boer, M
- Subjects
X-ray Astronomy ,Polarimetry ,X-ray optics ,Gas Pixel Detector - Abstract
XIPE, the X-ray Imaging Polarimetry Explorer, is a mission dedicated to X-ray Astronomy. At the time of writing XIPE is in a competitive phase A as fourth medium size mission of ESA (M4). It promises to reopen the polarimetry window in high energy Astrophysics after more than 4 decades thanks to a detector that efficiently exploits the photoelectric effect and to X-ray optics with large effective area. XIPE uniqueness is time-spectrally-spatially-resolved X-ray polarimetry as a breakthrough in high energy astrophysics and fundamental physics. Indeed the payload consists of three Gas Pixel Detectors at the focus of three X-ray optics with a total effective area larger than one XMM mirror but with a low weight. The payload is compatible with the fairing of the Vega launcher. XIPE is designed as an observatory for X-ray astronomers with 75 % of the time dedicated to a Guest Observer competitive program and it is organized as a consortium across Europe with main contributions from Italy, Germany, Spain, United Kingdom, Poland, Sweden.
- Published
- 2016
46. The first X-ray polarimetric observation of the black hole binary LMC X-1
- Author
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Podgorný, J, primary, Marra, L, additional, Muleri, F, additional, Cavero, N Rodriguez, additional, Ratheesh, A, additional, Dovčiak, M, additional, Mikušincová, R, additional, Brigitte, M, additional, Steiner, J F, additional, Veledina, A, additional, Bianchi, S, additional, Krawczynski, H, additional, Svoboda, J, additional, Kaaret, P, additional, Matt, G, additional, García, J A, additional, Petrucci, P-O, additional, Lutovinov, A, additional, Semena, A, additional, Di Marco, A, additional, Negro, M, additional, Weisskopf, M C, additional, Ingram, A, additional, Poutanen, J, additional, Beheshtipour, B, additional, Chun, S, additional, Hu, K, additional, Mizuno, T, additional, Sixuan, Z, additional, Tombesi, F, additional, Zane, S, additional, Agudo, I, additional, Antonelli, L A, additional, Bachetti, M, additional, Baldini, L, additional, Baumgartner, W H, additional, Bellazzini, R, additional, Bongiorno, S D, additional, Bonino, R, additional, Brez, A, additional, Bucciantini, N, additional, Capitanio, F, additional, Castellano, S, additional, Cavazzuti, E, additional, Chen, C, additional, Ciprini, S, additional, Costa, E, additional, De Rosa, A, additional, Del Monte, E, additional, Di Gesu, L, additional, Di Lalla, N, additional, Donnarumma, I, additional, Doroshenko, V, additional, Ehlert, S R, additional, Enoto, T, additional, Evangelista, Y, additional, Fabiani, S, additional, Ferrazzoli, R, additional, Gunji, S, additional, Hayashida, K, additional, Heyl, J, additional, Iwakiri, W, additional, Jorstad, S G, additional, Karas, V, additional, Kislat, F, additional, Kitaguchi, T, additional, Kolodziejczak, J J, additional, Monaca, F La, additional, Latronico, L, additional, Liodakis, I, additional, Maldera, S, additional, Manfreda, A, additional, Marin, F, additional, Marinucci, A, additional, Marscher, A P, additional, Marshall, H L, additional, Massaro, F, additional, Mitsuishi, I, additional, Ng, C-Y, additional, O’Dell, S L, additional, Omodei, N, additional, Oppedisano, C, additional, Papitto, A, additional, Pavlov, G G, additional, Peirson, A L, additional, Perri, M, additional, Pesce-Rollins, M, additional, Pilia, M, additional, Possenti, A, additional, Puccetti, S, additional, Ramsey, B D, additional, Rankin, J, additional, Roberts, O J, additional, Romani, R W, additional, Sgró, C, additional, Slane, P, additional, Soffitta, P, additional, Spandre, G, additional, Swartz, D A, additional, Tamagawa, T, additional, Tavecchio, F, additional, Taverna, R, additional, Tawara, Y, additional, Tennant, A F, additional, Thomas, N E, additional, Trois, A, additional, Tsygankov, S S, additional, Turolla, R, additional, Vink, J, additional, Wu, K, additional, and Xie, F, additional
- Published
- 2023
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- View/download PDF
47. A note on maxima and minima of dissipation in context of treatment of irreversible thermodynamic systems by application of Extremal Principles
- Author
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Svoboda, J., primary, Hackl, K., additional, and Fischer, F.D., additional
- Published
- 2023
- Full Text
- View/download PDF
48. Modelling of Processing Steps of New Generation ODS Alloys
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Svoboda, J., Horník, V., and Riedel, H.
- Published
- 2020
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49. Influence of bulk energy and triple junction mobility on interface kinetics - A tool for interpretation of experiments
- Author
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Hackl, K., Khan, A.U., Fischer, F.D., and Svoboda, J.
- Published
- 2019
- Full Text
- View/download PDF
50. Fermi-LAT and Suzaku Observations of the Radio Galaxy Centaurus B
- Author
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Katsuta, J., Tanaka, Y. T., Stawarz, L., O'Sullivan, S. P., Cheung, C. C., Kataoka, J., Funk, S., Yuasa, T., Odaka, H., Takahashi, T., and Svoboda, J.
- Subjects
Astrophysics - High Energy Astrophysical Phenomena ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
Centaurus B is a nearby radio galaxy positioned in the Southern hemisphere close to the Galactic plane. Here we present a detailed analysis of about 43 months of accumulated Fermi-LAT data of the gamma-ray counterpart of the source initially reported in the 2nd Fermi-LAT catalog, and of newly acquired Suzaku X-ray data. We confirm its detection at GeV photon energies, and analyze the extension and variability of the gamma-ray source in the LAT dataset, in which it appears as a steady gamma-ray emitter. The X-ray core of Centaurus B is detected as a bright source of a continuum radiation. We do not detect however any diffuse X-ray emission from the known radio lobes, with the provided upper limit only marginally consistent with the previously claimed ASCA flux. Two scenarios that connect the X-ray and gamma-ray properties are considered. In the first one, we assume that the diffuse non-thermal X-ray emission component is not significantly below the derived Suzaku upper limit. In this case, modeling the inverse-Compton emission shows that the observed gamma-ray flux of the source may in principle be produced within the lobes. This association would imply that efficient in-situ acceleration of the radiating electrons is occurring and that the lobes are dominated by the pressure from the relativistic particles. In the second scenario, with the diffuse X-ray emission well below the Suzaku upper limits, the lobes in the system are instead dominated by the magnetic pressure. In this case, the observed gamma-ray flux is not likely to be produced within the lobes, but instead within the nuclear parts of the jet. By means of synchrotron self-Compton modeling we show that this possibility could be consistent with the broad-band data collected for the unresolved core of Centaurus B, including the newly derived Suzaku spectrum., Comment: Accepted for publication in A&A. 11 pages
- Published
- 2012
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