301 citations
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8 papers · 1 filter
Cosmic-ray positrons from millisecond pulsars
C. Venter, A. Kopp, A. K. Harding +2
Observations by the Fermi Large Area Telescope of gamma-ray millisecond pulsar light curves imply copious pair production in their magnetospheres, and not exclusively in those of y…
Deep NuSTAR and Swift Monitoring Observations of the Magnetar 1E 1841-045
Hongjun An, Robert F. Archibald, Romain Hascoet +15
We report on a 350-ks NuSTAR observation of the magnetar 1E 1841-045 taken in 2013 September. During the observation, NuSTAR detected six bursts of short duration, with …
Strong Ultraviolet Pulse From a Newborn Type Ia Supernova
Yi Cao, S. R. Kulkarni, D. Andrew Howell +19
Type Ia supernovae are destructive explosions of carbon oxygen white dwarfs. Although they are used empirically to measure cosmological distances, the nature of their progenitors r…
Testing dissipative magnetosphere model light curves and spectra with FERMI pulsars
Gabriele Brambilla, Constantinos Kalapotharakos, Alice K. Harding +1
We explore the emission properties of a dissipative pulsar magnetosphere model introduced by Kalapotharakos et al. (2014), comparing its high energy light curves and spectra, due t…
Long term variability of Cygnus X-1: VII. Orbital variability of the focussed wind in Cyg X-1 / HDE 226868 system
V. Grinberg, M. A. Leutenegger, N. Hell +8
Binary systems with an accreting compact object are a unique chance to investigate the strong, clumpy, line-driven winds of early type supergiants by using the compact object's X-r…
A 400 solar mass black hole in the Ultraluminous X-ray source M82 X-1 accreting close to its Eddington limit
Dheeraj R. Pasham, Tod E. Strohmayer, Richard F. Mushotzky
M82 X-1, the brightest X-ray source in the galaxy M82, has been thought to be an intermediate-mass black hole (100 to 10,000 solar masses) because of its extremely high luminosity…