output
19972026
most citedThe Swift X-ray Telescope

2.7k citations

Showing 2007 · astro-phShow all

17 papers · 2 filters

astro-ph2007

A new explanation for the SFXTs outbursts

L. Sidoli, P. Romano, S. Mereghetti +4

The physical mechanism responsible for the short outbursts in a recently recognized class of High Mass X-ray Binaries, the Supergiant Fast X-ray Transients (SFXTs), is still unknow…

astro-ph2007★ 374 cited

Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei

The Pierre Auger Collaboration

Data collected by the Pierre Auger Observatory provide evidence for anisotropy in the arrival directions of the cosmic rays with the highest energies, which are correlated with the…

astro-ph2007★ 172 cited

Upper limit on the diffuse flux of UHE tau neutrinos from the Pierre Auger Observatory

The Pierre Auger Collaboration

The surface detector array of the Pierre Auger Observatory is sensitive to Earth-skimming tau-neutrinos that interact in the Earth's crust. Tau leptons from charged-cur…

astro-ph2007★ 129 cited

Different progenitors of short hard gamma-ray bursts

Eleonora Troja, Andrew R. King, Paul T. O'Brien +2

We consider the spatial offsets of short hard gamma-ray bursts (SHBs) from their host galaxies. We show that all SHBs with extended duration soft emission components lie very close…

astro-ph2007★ 121 cited

An alternative hypothesis for the outburst mechanism in Supergiant Fast X-ray Transients: the case of IGR J11215-5952

L. Sidoli, P. Romano, S. Mereghetti +4

(ABRIDGED)- The physical mechanism responsible for the short outbursts in a recently recognized class of High Mass X-ray Binaries, the Supergiant Fast X-ray Transients (SFXTs), is…

astro-ph2007★ 14 cited

X-Ray Eclipse Time Delays in 4U2129+47

E. Bozzo, M. Falanga, A. Papitto +8

4U 2129+47 was discovered in the early 80's and classified as an accretion disk corona source due to its broad and partial X-ray eclipses. The 5.24 hr binary orbital period was inf…

astro-ph2007★ 32 cited

GRB 070311: a direct link between the prompt emission and the afterglow

C. Guidorzi, S. D. Vergani, S. Sazonov +30

We present prompt gamma-ray, early NIR/optical, late optical and X-ray observations of the peculiar GRB 070311 discovered by INTEGRAL, in order to gain clues on the mechanisms resp…

astro-ph2007★ 66 cited

Detection of GRB 060927 at z = 5.47: Implications for the Use of Gamma-Ray Bursts as Probes of the End of the Dark Ages

A. E. Ruiz-Velasco, H. Swan, E. Troja +54

We report on follow-up observations of the GRB 060927 using the ROTSE-IIIa telescope and a suite of larger aperture ground-based telescopes. An optical afterglow was detected 20 s…

astro-ph2007★ 25 cited

New flaring of an ultraluminous X-ray source in NGC 1365

R. Soria, A. Baldi, G. Risaliti +4

We have studied a highly variable ultraluminous X-ray source (ULX) in the Fornax galaxy NGC 1365, with a series of 12 Chandra and XMM-Newton observations between 2002 and 2006. In…

astro-ph2007★ 29 cited

Testing the gamma-ray burst variability/peak luminosity correlation on a Swift homogeneous sample

D. Rizzuto, C. Guidorzi, P. Romano +10

We test the gamma-ray burst correlation between temporal variability and peak luminosity of the -ray profile on a homogeneous sample of 36 Swift/BAT GRBs with firm redshift dete…

astro-ph2007★ 22 cited

The exceptionally extended flaring activity in the X-ray afterglow of GRB 050730 observed with Swift and XMM-Newton

M. Perri, D. Guetta, L. A. Antonelli +27

We present the results of a detailed spectral and temporal analysis of Swift and XMM-Newton observations of the high redshift (z=3.969) GRB 050730. The X-ray afterglow of GRB 05073…

astro-ph2007★ 63 cited

Swift/XRT observes the fifth outburst of the periodic Supergiant Fast X-ray Transient IGR J11215-5952

P. Romano, L. Sidoli, V. Mangano +2

IGR J11215-5952 is a hard X-ray transient source discovered in April 2005 with INTEGRAL and a confirmed member of the new class of High Mass X-ray Binaries, the Supergiant Fast X-r…

astro-ph2007★ 118 cited

GRB 060505: A possible short-duration gamma-ray burst in a star forming region at redshift of 0.09

E. O. Ofek, S. B. Cenko, A. Gal-Yam +26

On 2006 May 5, a four second duration, low energy, ~10^49 erg, Gamma-Ray Burst (GRB) was observed, spatially associated with a z=0.0894 galaxy. Here, we report the discovery of the…

astro-ph2007★ 84 cited

A 0535+26 in the August/September 2005 outburst observed by RXTE and INTEGRAL

I. Caballero, P. Kretschmar, A. Santangelo +14

In this Letter we present results from INTEGRAL and RXTE observations of the spectral and timing behavior of the High Mass X-ray Binary A 0535+26 during its August/September 2005 n…

astro-ph2007★ 261 cited

The First Survey of X-ray Flares from Gamma Ray Bursts Observed by Swift: Temporal Properties and Morphology

G. Chincarini, A. Moretti, P. Romano +24

We present the first systematic investigation of the morphological and timing properties of flares in GRBs observed by Swift/XRT. We consider a large sample drawn from all GRBs det…

astro-ph2007★ 305 cited

Swift observations of GRB 070110: an extraordinary X-ray afterglow powered by the central engine

E. Troja, G. Cusumano, P. O'Brien +22

We present a detailed analysis of Swift multi-wavelength observations of GRB 070110 and its remarkable afterglow. The early X-ray light curve, interpreted as the tail of the prompt…

astro-ph2007★ 51 cited

X-ray Flares in Early GRB Afterglows

D. N. Burrows, A. Falcone, G. Chincarini +12

The Swift X-ray Telescope (XRT) has discovered that flares are quite common in early X-ray afterglows of Gamma-Ray Bursts (GRBs), being observed in roughly 50% of afterglows with p…