Publications (74)
An Extremely Luminous and Variable Ultraluminous X-ray Source in the Outskirts of Circinus Observed with NuSTAR
D. J. Walton, F. Fuerst, F. A. Harrison +16
Following a serendipitous detection with the NuSTAR observatory, we present a multi-epoch spectral and temporal analysis of an extreme ultraluminous X-ray source (ULX) located in t…
Solar observations with single-dish INAF radio telescopes: continuum imaging in the 18-26 GHz range
A. Pellizzoni, S. Righini, M. N. Iacolina +28
We present a new solar radio imaging system implemented through the upgrade of the large single-dish telescopes of the Italian National Institute for Astrophysics (INAF), not origi…
A 78 Day X-ray Period Detected from NGC 5907 ULX1 by Swift
D. J. Walton, F. Fuerst, M. Bachetti +12
We report the detection of a day period in the X-ray lightcurve of the extreme ultraluminous X-ray source NGC 5907 ULX1 ( erg s$^{-1…
Long-term pulse period evolution of the ultra-luminous X-ray pulsar NGC 7793 P13
F. Fuerst, D. J. Walton, M. Heida +14
Ultra-luminous X-ray pulsars (ULXPs) provide a unique opportunity to study super-Eddington accretion. We present the results of a monitoring campaign of ULXP NGC 7793 P13. Over our…
X-ray polarimetry of X-ray pulsar X Persei: another orthogonal rotator?
A. A. Mushtukov, S. S. Tsygankov, J. Poutanen +103
X Persei is a persistent low-luminosity X-ray pulsar of period of 835 s in a Be binary system. The field strength at the neutron star surface is not known precisely, but indi…
The geometry of the hot corona in MCG-05-23-16 constrained by X-ray polarimetry
D. Tagliacozzo, A. Marinucci, F. Ursini +105
We report on the second observation of the radio-quiet active galactic nucleus (AGN) MCG-05-23-16 performed with the Imaging X-ray Polarimetry Explorer (IXPE). The observation star…