Zobrazeno 1 - 10
of 103
pro vyhledávání: '"Salvetti, David"'
Autor:
Marelli, Martino, Molendi, Silvano, Rossetti, Mariachiara, Gastaldello, Fabio, Salvetti, David, De Luca, Andrea, Bartalucci, Iacopo, Kühl, Patrick, Esposito, Paolo, Ghizzardi, Simona, Tiengo, Andrea
Our understanding of the background of the EPIC/pn camera onboard XMM-Newton is incomplete. This affects the study of extended sources and can influence the predictions of the background of future X-ray missions. We provide new results based on the a
Externí odkaz:
http://arxiv.org/abs/2012.02071
Autor:
Pizzocaro, Daniele, Stelzer, Beate, Poretti, Ennio, Raetz, Stefanie, Micela, Giusi, Belfiore, Andrea, Marelli, Martino, Salvetti, David, De Luca, Andrea
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:
http://arxiv.org/abs/1906.05587
Autor:
Marelli, Martino, Tiengo, Andrea, De Luca, Andrea, Mignani, Roberto P., Salvetti, David, Parkinson, Pablo M. Saz, Lisini, Gianni
Publikováno v:
A&A 624, A53 (2019)
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:
http://arxiv.org/abs/1808.06966
Autor:
Mereghetti, Sandro, De Luca, Andrea, Salvetti, David, Belfiore, Andrea, Marelli, Martino, Paizis, Adamantia, Rigoselli, Michela, Salvaterra, Ruben, Sidoli, Lara, Tiengo, Andrea
We report the discovery of a flaring X-ray source in the globular cluster NGC 6540, obtained during the EXTraS project devoted to a systematic search for variability in archival data of the XMM-Newton satellite. The source had a quiescent X-ray lumin
Externí odkaz:
http://arxiv.org/abs/1805.08057
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
Externí odkaz:
http://arxiv.org/abs/1705.09832
Autor:
Ghizzardi, Simona, Marelli, Martino, Salvetti, David, Gastaldello, Fabio, Molendi, Silvano, De Luca, Andrea, Moretti, Alberto, Rossetti, Mariachiara, Tiengo, Andrea
A detailed characterization of the particle induced background is fundamental for many of the scientific objectives of the Athena X-ray telescope, thus an adequate knowledge of the background that will be encountered by Athena is desirable. Current X
Externí odkaz:
http://arxiv.org/abs/1705.04173
Autor:
Marelli, Martino, Salvetti, David, Gastaldello, Fabio, Ghizzardi, Simona, Molendi, Silvano, De Luca, Andrea, Moretti, Alberto, Rossetti, Mariachiara, Tiengo, Andrea
XMM-Newton is the direct precursor of the future ESA ATHENA mission. A study of its particle-induced background provides therefore significant insight for the ATHENA mission design. We make use of about 12 years of data, products from the third XMM-N
Externí odkaz:
http://arxiv.org/abs/1705.04171
Autor:
Salvetti, David
During its first 2 years of mission the Fermi-LAT instrument discovered more than 1,800 gamma-ray sources in the 100 MeV to 100 GeV range. Despite the application of advanced techniques to identify and associate the Fermi-LAT sources with counterpart
Externí odkaz:
http://arxiv.org/abs/1603.00231
Autor:
Castillo, Guillermo A. Rodríguez, Israel, Gian Luca, Tiengo, Andrea, Salvetti, David, Turolla, Roberto, Zane, Silvia, Rea, Nanda, Esposito, Paolo, Mereghetti, Sandro, Perna, Rosalba, Stella, Luigi, Pons, José A., Campana, Sergio, Götz, Diego, Motta, Sara
We study the timing and spectral properties of the low-magnetic field, transient magnetar SWIFT J1822.3-1606 as it approached quiescence. We coherently phase-connect the observations over a time-span of ~500 days since the discovery of SWIFT J1822.3-
Externí odkaz:
http://arxiv.org/abs/1510.09157
Autor:
Pizzocaro, Daniele, Stelzer, Beate, Paladini, Roberta, Tiengo, Andrea, Lisini, Gianni, Novara, Giovanni, Vianello, Giacomo, Belfiore, Andrea, Marelli, Martino, Salvetti, David, Pillitteri, Ignazio, Sciortino, Salvatore, D'Agostino, Daniele, Haberl, Frank, Watson, Mike, Wilms, Joern, Salvaterra, Ruben, De Luca, Andrea
Publikováno v:
A&A 587, A36 (2016)
X-ray emission from Young Stellar Objects (YSOs) is crucial to understand star formation. A very limited amount of X-ray results is available for the protostellar (ClassI) phase. A systematic search of transient X-ray phenomena combined with a carefu
Externí odkaz:
http://arxiv.org/abs/1510.06286