Relativistic jet activity from the tidal disruption of a star by a massive black hole
- D. Burrows, J. Kennea, N. Gehrels
- 1 August 2011
Observations of a bright X-ray flare from the extragalactic transient Swift J164449.3+573451 conclude that they have captured the onset of relativistic jet activity from a supermassive black hole.
A Low-Magnetic-Field Soft Gamma Repeater
- N. Rea, P. Esposito, C. Kouveliotou
- 13 October 2010
The magnetar population may include objects with a wider range of B-field strengths, ages, and evolutionary stages than observed so far, implying that this population is wider than was previously thought.
An accreting pulsar with extreme properties drives an ultraluminous x-ray source in NGC 5907
- G. Israel, A. Belfiore, A. Wolter
- 23 September 2016
Observations showing that NGC 5907 ULX is instead an x-ray accreting neutron star (NS) with a spin period evolving from 1.43 seconds in 2003 to 1.13 seconds in 2014 suggest that other extreme ULXs (x-ray luminosity ≥ 1041 erg second−1) might harbor NSs.
Discovery of a 0.42-s pulsar in the ultraluminous X-ray source NGC 7793 P13
- G. Israel, A. Papitto, G. Lisini
- 21 September 2016
NGC 7793 P13 is a variable (luminosity range ∼100) ultraluminous X-ray source proposed to host a stellar-mass black hole of less than 15 M⊙ in a binary system with orbital period of 64 d and a 18-23…
The discovery, monitoring and environment of SGR J1935+2154
- G. Israel, P. Esposito, R. Turolla
- Computer Science
- 3 January 2016
This work is partially supported by the European COST ActionMP1304 (NewCOMPSTAR) and the NWO Vidi Grant, and by grants AYA2012-39303 and SGR2014-1073.
An Ultramassive, Fast-Spinning White Dwarf in a Peculiar Binary System
- S. Mereghetti, A. Tiengo, P. Esposito, N. La Palombara, G. Israel, L. Stella
- Physics, GeologyScience
- 4 September 2009
X-ray observations show that a white dwarf has a mass near the limit above which these stars become gravitationally unstable, and provide constraints on the poorly understood process that led to the formation of the solar system.
An XMM-Newton View of the Soft Gamma Repeater SGR 1806–20: Long-Term Variability in the Pre-Giant Flare Epoch
- S. Mereghetti, A. Tiengo, S. Zane
- 21 February 2005
The low-energy (<10 keV) X-ray emission of the soft gamma repeater SGR 1806-20 has been studied by means of four XMM-Newton observations carried out in the last two years, the latest performed in…
The first outburst of the new magnetar candidate SGR 0501+4516
We report here on the outburst onset and evolution of the new soft gamma-ray repeater SGR 0501+4516. We monitored the new SGR with XMM- Newton starting on 2008 August 23, 1 day after the source…
A NEW LOW MAGNETIC FIELD MAGNETAR: THE 2011 OUTBURST OF SWIFT J1822.3−1606
We report on the long-term X-ray monitoring with Swift, RXTE, Suzaku, Chandra, and XMM-Newton of the outburst of the newly discovered magnetar Swift J1822.3−1606 (SGR 1822−1606), from the first…
THE DUST-SCATTERING X-RAY RINGS OF THE ANOMALOUS X-RAY PULSAR 1E 1547.0–5408
- A. Tiengo, G. Vianello, N. Gehrels
- 16 November 2009
On 2009 January 22 numerous strong bursts were detected from the anomalous X-ray pulsar 1E 1547.0–5408. Swift/XRT and XMM-Newton/EPIC observations carried out in the following two weeks led to the…