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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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14 papers · 2 filters
The lack of X-ray pulsations in the extreme helium star BD+37442 and its possible stellar wind X-ray emission
S. Mereghetti, N. La Palombara, Andrea Tiengo +1
We report the results of a new \textit{XMM-Newton} observation of the helium-rich hot subdwarf BD+37442 carried out in February 2016. The possible periodicity at 19 s see…
The e-ASTROGAM mission (exploring the extreme Universe with gamma rays in the MeV-GeV range)
Alessandro De Angelis, Vincent Tatischeff, Marco Tavani +71
e-ASTROGAM (`enhanced ASTROGAM') is a breakthrough Observatory mission dedicated to the study of the non-thermal Universe in the photon energy range from 0.3 MeV to 3 GeV. The miss…
EXTraS discovery of two pulsators in the direction of the LMC: a Be/X-ray binary pulsar in the LMC and a candidate double-degenerate polar in the foreground
F. Haberl, G. L. Israel, G. A. Rodriguez Castillo +10
The EXTraS project to explore the X-ray Transient and variable Sky searches for coherent signals in the X-ray archival data of XMM-Newton. XMM-Newton performed more than 400 pointe…
An accreting pulsar with extreme properties drives an ultraluminous x-ray source in NGC 5907
G. L. Israel, A. Belfiore, L. Stella +20
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 ve…
Discovery of a 0.42-s pulsar in the ultraluminous X-ray source NGC 7793 P13
G. L. Israel, A. Papitto, P. Esposito +11
NGC 7793 P13 is a variable (luminosity range ~100) ultraluminous X-ray source (ULX) proposed to host a stellar-mass black hole of less than 15 M in a binary system with o…
Searching for the optical counterparts of two young gamma-ray pulsars
R. P. Mignani, V. Testa, M. Marelli +7
We report on the first deep optical observations of two -ray pulsars, both among the very first discovered by the {\em Fermi} Gamma-ray Space Telescope. The two pulsars are the…
A deep campaign to characterize the synchronous radio/X-ray mode switching of PSR B0943+10
S. Mereghetti, L. Kuiper, A. Tiengo +14
We report on simultaneous X-ray and radio observations of the mode-switching pulsar PSR B0943+10 obtained with the XMM-Newton satellite and the LOFAR, LWA and Arecibo radio telesco…
Observations of three young gamma-ray pulsars with the Gran Telescopio Canarias
R. P. Mignani, N. Rea, V. Testa +6
We report the analysis of the first deep optical observations of three isolated -ray pulsars detected by the {\em Fermi Gamma-ray Space Telescope}: the radio-loud PSR\, J0248+60…
A candidate optical counterpart to the middle-aged gamma-ray pulsar PSR J1741-2054
R. P. Mignani, V. Testa, M. Marelli +7
We carried out deep optical observations of the middle-aged -ray pulsar PSR J1741-2054 with the Very Large Telescope (VLT). We identified two objects, of magnitudes $m_v=23.10\p…
AGILE Observations of the Gravitational Wave Event GW150914
M. Tavani, C. Pittori, F. Verrecchia +35
We report the results of an extensive search in the AGILE data for a gamma-ray counterpart of the LIGO gravitational wave event GW150914. Currently in spinning mode, AGILE has the…
Discovery of spin-up in the X-ray pulsar companion of the hot subdwarf HD 49798
Sandro Mereghetti, Fabio Pintore, Paolo Esposito +4
The hot subdwarf HD 49798 has an X-ray emitting compact companion with a spin-period of 13.2 s and a dynamically measured mass of 1.28+/-0.05 M_sun, consistent with either a neutro…
Spectral analysis of SMC X-2 during its 2015 outburst
N. La Palombara, L. Sidoli, F. Pintore +3
We report on the results of Swift and XMM-Newton observations of SMC X-2 during its last outburst in 2015 October, the first one since 2000. The source reached a very high luminosi…
The variable spin-down rate of the transient magnetar XTE J1810--197
F. Pintore, F. Bernardini, S. Mereghetti +7
We have analyzed XMM-Newton and Chandra observations of the transient magnetar XTE J1810-197, spanning more than 11 years, from the initial phases of the 2003 outburst to the curre…
The discovery, monitoring and environment of SGR J1935+2154
G. L. Israel, P. Esposito, N. Rea +9
We report on the discovery of a new member of the magnetar class, SGR J1935+2154, and on its timing and spectral properties measured by an extensive observational campaign carried…