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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…
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…
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…
Monte Carlo simulations of soft proton flares: testing the physics with XMM-Newton
Valentina Fioretti, Andrea Bulgarelli, Giuseppe Malaguti +2
Low energy protons (<100-300 keV) in the Van Allen belt and the outer regions can enter the field of view of X-ray focusing telescopes, interact with the Wolter-I optics, and reach…
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…