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The EXTraS Project: Exploring the X-ray transient and variable sky

Publikováno v: Astronomy & astrophysics
650 (2021): A167. doi:10.1051/0004-6361/202039783
info:cnr-pdr/source/autori:A. De Luca, R. Salvaterra, A. Belfiore, S. Carpano, D. D'Agostino, F. Haberl, G. L. Israel, D. Law-Green, G. Lisini, M. Marelli, G. Novara, A. M. Read, G. Rodriguez-Castillo, S. R. Rosen, 6, D. Salvetti, A. Tiengo, G. Vianello, M. G. Watson, C. Delvaux, T. Dickens, P. Esposito, J. Greiner, H. Hammerle, A. Kreikenbohm, S. Kreykenbohm, M. Oertel, D. Pizzocaro, J. P. Pye, S. Sandrelli, B. Stelzer, J. Wilms, and F. Zagaria/titolo:The EXTraS Project: Exploring the X-ray transient and variable sky/doi:10.1051%2F0004-6361%2F202039783/rivista:Astronomy & astrophysics (Print)/anno:2021/pagina_da:A167/pagina_a:/intervallo_pagine:A167/volume:650

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. The EPIC instrument on board the XMM-Newton observatory is the most powerful tool for

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb6f74a174c1e07ad182e0eb4ce62cc2

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Observations of one young and three middle-aged γ-ray pulsars with the Gran Telescopio Canarias

Autor: D. Salvetti, Nanda Rea, Vincenzo Testa, Diego F. Torres, E. de Oña Wilhelmi, Roberto Mignani, M. Marelli

Publikováno v: Monthly Notices of the Royal Astronomical Society, 478(1), 332-341. Oxford University Press

We used the 10.4m Gran Telescopio Canarias to search for the optical counterparts to four isolated $\gamma$-ray pulsars, all detected in the X-rays by either \xmm\ or \chan\ but not yet in the optical. Three of them are middle-aged pulsars -- PSR\, J

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2328eef1abfc50d50a99376e3033ced8
http://adsabs.harvard.edu/abs/2018MNRAS.478..332M

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Identifying TeV Source Candidates among Fermi-LAT Unclassified Blazars

Autor: D. Salvetti, G. Chiaro, Manuel Meyer, D. J. Thompson, M. Di Mauro, G. La Mura

Blazars and in particular the subclass of high synchrotron peaked Active Galactic Nuclei are among the main targets for the present generation of Imaging Atmospheric Cherenkov Telescopes (IACTs) and will remain of great importance for very high-energ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1830a2a5b65e31715e1408b36548df28
http://arxiv.org/abs/1909.10834

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The two tails of PSR J2055+2539 as seen by Chandra: Analysis of the nebular morphology and pulsar proper motion

Autor: Andrea Tiengo, M. Marelli, A. De Luca, Gianni Lisini, D. Salvetti, P. M. Saz Parkinson, Roberto Mignani

We analyzed two Chandra observations of PSR J2055+2539 (for a total integration time of $\sim$130 ks) in order to measure its proper motion and study its two elongated nebular features. We did not detect the proper motion, setting an upper limit of 2

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec3741b62c084a815d1baec80ffbbd92
http://hdl.handle.net/20.500.12386/29160

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An accreting pulsar with extreme properties drives an ultraluminous x-ray source in NGC 5907

Publikováno v: Science
Science, 355(6327), 817-819. American Association for the Advancement of Science
Science (New York, N.Y.) 355 (2017): 817–819. doi:10.1126/science.aai8635
info:cnr-pdr/source/autori:G. Israel, A. Belfiore, L. Stella, P. Esposito, P. Casella, A. De Luca, M. Marelli, A. Papitto, M. Perri, S. Puccetti, G. A. Rodriguez Castillo, D. Salvetti, A. Tiengo, L. Zampieri, D. D'Agostino, J. Greiner, F. Haberl, G. Novara, R. Salvaterra, R. Turolla, M. Watson, J. Wilms, and A. Wolter/titolo:An accreting pulsar with extreme properties drives an ultraluminous x-ray source in NGC 5907/doi:10.1126%2Fscience.aai8635/rivista:Science (New York, N.Y.)/anno:2017/pagina_da:817/pagina_a:819/intervallo_pagine:817–819/volume:355

Ultraluminous x-ray sources (ULXs) in nearby galaxies shine brighter than any X-ray source in our Galaxy. ULXs are usually modeled as stellar-mass black holes (BHs) accreting at very high rates or intermediate-mass BHs. We present observations showin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d01073d434ced2070649b315c911e9f8
https://doi.org/10.1126/science.aai8635

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Large Binocular Telescope observations of PSR J2043+2740*

Autor: R. Carini, M. Marelli, Felice Cusano, D. Salvetti, Roberto Mignani, Vincenzo Testa, A. A. Breeveld, Nanda Rea

Publikováno v: Monthly Notices of the Royal Astronomical Society, 473(2), 2000-2003. Oxford University Press

We present the results of deep optical imaging of the radio/$\gamma$-ray pulsar PSR J2043+2740, obtained with the Large Binocular Telescope (LBT). With a characteristic age of 1.2 Myr, PSR J2043+2740 is one of the oldest (non recycled) pulsars detect

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc658158b07fe0dee35b4a8147ef98b7
http://hdl.handle.net/20.500.12386/28240

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The Einstein@Home Gamma-ray Pulsar Survey. II. Source Selection, Spectral Analysis, and Multiwavelength Follow-up

Publikováno v: Astrophys.J.
Astrophys.J., 2018, 854 (2), pp.99. ⟨10.3847/1538-4357/aaa411⟩
The Astrophysical Journal
The Astrophysical Journal, American Astronomical Society, 2018, 854 (2), pp.99. ⟨10.3847/1538-4357/aaa411⟩
Wu, J, Clark, C J, Pletsch, H J, Guillemot, L, Johnson, T J, Torne, P, Champion, D J, Deneva, J, Ray, P S, Salvetti, D, Kramer, M, Aulbert, C, Beer, C, Bhattacharyya, B, Bock, O, Camilo, F, Cognard, I, Cuéllar, A, Eggenstein, H B, Fehrmann, H, Ferrara, E C, Kerr, M, Machenschalk, B, Ransom, S M, Sanpa-Arsa, S & Wood, K 2018, ' The Einstein@Home Gamma-ray Pulsar Survey. II. Source Selection, Spectral Analysis, and Multiwavelength Follow-up ', Astrophysical Journal, vol. 854, no. 2, 99 . https://doi.org/10.3847/1538-4357/aaa411
Astrophys.J., 2018, 854 (2), pp.99. 〈10.3847/1538-4357/aaa411〉

We report on the analysis of 13 gamma-ray pulsars discovered in the Einstein@Home blind search survey using Fermi Large Area Telescope (LAT) Pass 8 data. The 13 new gamma-ray pulsars were discovered by searching 118 unassociated LAT sources from the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d64dd1346058a1ee682a655cef746c78
https://hal.archives-ouvertes.fr/hal-01714167

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3FGLzoo. Classifying 3FGL Unassociated Fermi-LAT Gamma-ray Sources by Artificial Neural Networks

Autor: D. Salvetti, G. La Mura, D. J. Thompson, G. Chiaro

In its first four years of operation, the Fermi Large Area Telescope (LAT) detected 3033 $\gamma$-ray emitting sources. In the Fermi-LAT Third Source Catalogue (3FGL) about 50% of the sources have no clear association with a likely $\gamma$-ray emitt

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A multiwavelength investigation of candidate millisecond pulsars in unassociated γ-ray sources

Autor: M. Marelli, C. Pallanca, Werner Becker, Andrea Belfiore, D. Salvetti, P. Hüsemann, Jochen Greiner, A. A. Breeveld, A. De Luca, Roberto Mignani

About one third of the 3033 $\gamma$-ray sources in the Third Fermi-LAT Gamma-ray Source Catalogue (3FGL) are unidentified and do not have even a tentative association with a known object, hence they are defined as unassociated. Among Galactic $\gamm

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bfa83ee29d3ffbfecd1e534d69d33d4d
http://hdl.handle.net/20.500.12386/26605

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Activity and rotation of the X-ray emittingKeplerstars

Autor: S. Raetz, D. Pizzocaro, Beate Stelzer, Giuseppina Micela, M. Marelli, D. Salvetti, A. De Luca, Ennio Poretti, Andrea Belfiore

Publikováno v: Astronomy & Astrophysics. 628:A41

The relation between magnetic activity and rotation in late-type stars provides fundamental information on stellar dynamos and angular momentum evolution. Rotation/activity studies found in the literature suffer from inhomogeneity in the measure of a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0df98d98c361de077f610fe1f59527d3
https://doi.org/10.1051/0004-6361/201731674

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