Zobrazeno 1 - 10
of 93
pro vyhledávání: '"Tommaso Maccacaro"'
Autor:
Barbara Balmaverde, Marco Berton, Lucía Ballo, Alessandro Caccianiga, Tommaso Maccacaro, B. Sbarufatti, Anna Wolter, I Gioia, R. Della Ceca, Andrea Belfiore
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 492:3728-3741
The REX (Radio-Emitting X-ray sources) is a catalogue produced by cross-matching X-ray data from the ROSAT-PSPC archive of pointed observations and radio data from the NRAO VLA Sky Survey, aimed at the selection of blazars. From the REX catalogue, we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0be1767164843226450d6dab6995d821
https://doi.org/10.1093/mnras/stz3532
https://doi.org/10.1093/mnras/stz3532
Autor:
Tommaso Maccacaro, Claudio M. Tartari
Una historia lúcida y deslumbrante de una de las búsquedas más esenciales e intemporales del ser humano: comprender los límites del mundo y encontrar el sitio que ocupamos en él. «¿Dónde estamos?» es una pregunta aparentemente trivial que se
Autor:
Didier Barret, S. Dupuy, R. D. Saxton, John P. Pye, Federico Fraschetti, Ian M. Stewart, Th. Boller, Masaaki Sakano, Marcella Brusa, Silvia Mateos, P. Severgnini, M. W. Pakull, Sean Farrell, M. Simpson, Richard G. West, A. Caccianiga, Wolfgang Pietsch, Georg Lamer, Xavier Barcons, Christian Motch, R. Della Ceca, Francisco J. Carrera, Hermann Brunner, Clive G. Page, Valeri Hambaryan, Tommaso Maccacaro, N. A. Webb, M. Denby, J. Ballet, A. M. Stobbart, M. G. Watson, P. Guillout, G. Denkinson, G. Sironi, Laurent Michel, M. J. Page, B. Mathiesen, Diana M Worrall, G. C. Stewart, R. S. Warwick, A. C. Schröder, J. P. Osborne, W. Yuan, Michael Freyberg, Stuart Rosen, Richard G. McMahon, D. Fyfe, Jonathan Tedds, Axel Schwope, María Teresa Ceballos
Publikováno v:
Astronomy & Astrophysics. 493:339-373
Aims: Pointed observations with XMM-Newton provide the basis for creating catalogues of X-ray sources detected serendipitously in each field. This paper describes the creation and characteristics of the 2XMM catalogue. Methods: The 2XMM catalogue has
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5297a020aa8bc0bb23f729132dd6519f
https://doi.org/10.1051/0004-6361:200810534
https://doi.org/10.1051/0004-6361:200810534
Autor:
A. Caccianiga, Tommaso Maccacaro, Silvia Mateos, Luigi Foschini, Lucía Ballo, P. Severgnini, Sonia Antón, R. Della Ceca, M. J. M. Marchã, E. Sani
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
instname
We investigate the mid-infrared (mid-IR) properties of the largest (42 objects) sample of radio-loud narrow-line Seyfert 1 (RL NLS1) collected to date, using data from the Wide-field Infrared Survey Explorer. We analyse the mid-IR colours of these ob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f945c32e04d6ad7bf68af8d48bcdf19
http://hdl.handle.net/20.500.12386/23156
http://hdl.handle.net/20.500.12386/23156
Publikováno v:
The Astrophysical Journal. 621:L97-L100
We present the first optical validation of an X-ray line-emitting object (XLEO) discovered in the XMM-Newton observation of the Chandra Deep Field-South. The object is an active galactic nucleus at zX ~ 0.66. An optical spectrum of the source indeed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9ce111b037de83a735ce0436275dc07
https://doi.org/10.1086/429253
https://doi.org/10.1086/429253
Autor:
Georg Lamer, R. Della Ceca, V. Braito, Tommaso Maccacaro, M. G. Watson, A. Caccianiga, Axel Schwope, P. Severgnini, Xavier Barcons, Ingo Lehmann, Francisco J. Carrera, M. J. Page, Hermann Brunner, Jonathan Tedds
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
instname
We present here “The XMM-Newton Bright Serendipitous Survey”, composed of two flux-limited samples: the XMM-Newton Bright Source Sample (BSS, hereafter) and the XMM-Newton “Hard” Bright Source Sample (HBSS, hereafter) having a flux limit of f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4b61eca5ca879e9bcadbae3ae274a2c
https://doi.org/10.1051/0004-6361:20040252
https://doi.org/10.1051/0004-6361:20040252
Autor:
Roberto Della Ceca, Paola Severgnini, Anna Wolter, Alessandro Caccianiga, Valentina Braito, Tommaso Maccacaro
Publikováno v:
Astrophysics and Space Science. 294:89-94
We present here some initial results from the ongoing XMM-Newton bright serendipitous survey. The survey is aimed at selecting and spectroscopically identifying a large and statistically representative sample of bright (fx ≳ 7× 10−14 c.g.s) sere
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0587a09e0347bcbd58a31711cd9ee3f6
https://doi.org/10.1007/s10509-004-4026-2
https://doi.org/10.1007/s10509-004-4026-2
Autor:
Eleonora Sani, Alessandro Caccianiga, Paola Severgnini, R. Della Ceca, Alexander Kraus, Lucía Ballo, Daniele Dallacasa, Luigi Foschini, R. Fanali, Timothy S. Hamilton, Sonia Anton, Tommaso Maccacaro, Ana Paulino-Afonso, M. J. M. Marchã, Karl-Heinz Mack
We present SDSSJ143244.91+301435.3, a new case of radio-loud narrow line Seyfert 1 (RL NLS1) with a relatively high radio power (P1.4GHz=2.1x10^25 W Hz^-1) and large radioloudness parameter (R1.4=600+/-100). The radio source is compact with a linear
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::25eecb042534a1dd2f823d0455b3d1ea
http://hdl.handle.net/11585/372671
http://hdl.handle.net/11585/372671
Autor:
C. Megan Urry, C. M. Raiteri, Matteo Guainazzi, Laura Maraschi, Gabriele Ghisellini, Paolo Giommi, Gianpiero Tagliaferri, Tommaso Maccacaro, M. Villata, Paolo Padovani, Anna Wolter, Andrea Comastri
Publikováno v:
Scopus-Elsevier
The wide energy band of BeppoSAX, together with its good energy resolution, offers the opportunity to investigate the overall X-ray spectra of BL Lacs, in order to measured in detail their shape, to establish where the Compton component becomes domin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ebec3cd663a49f7f203e64847b6f1b2
https://doi.org/10.1016/s0920-5632(98)00251-5
https://doi.org/10.1016/s0920-5632(98)00251-5
Autor:
C. Megan Urry, Gianpiero Tagliaferri, Tommaso Maccacaro, Andrea Comastri, Laura Maraschi, Franco Mantovani, Gabriele Ghisellini, Paolo Giommi, Carlo Stanghellini, Paolo Padovani, Anna Wolter
Publikováno v:
Nuclear Physics B - Proceedings Supplements. 69:431-434
Preliminary results on BeppoSAX LECS and MECS observations of BL Lacertae objects selected from the 1 Jy sample are presented. All sources of the LBL type, that is, characterized by a peak in their multifrequency spectra at infrared/optical energies,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8be78d61c0f10678a9c13cd0cf289f9b
https://doi.org/10.1016/s0920-5632(98)00256-4
https://doi.org/10.1016/s0920-5632(98)00256-4