GRB 021206 is one of the brightest GRBs ever observed. Its prompt emission, as measured by RHESSI, shows an unexpected spectral feature. The spectrum has a peak energy of about 700 keV and can be ...described by a Band function up to 4.5 MeV. Above 4.5 MeV, the spectrum hardens again, so the Band function fails to fit the whole RHESSI energy range up to 17 MeV. Nor does the sum of a blackbody function plus a power law, even though such a function can describe a spectral hardening. The cannonball model, on the other hand, predicts such a hardening, and we found that it fits the spectrum of GRB 021206 perfectly. We also analyzed other strong GRBs observed by RHESSI, namely, GRBs 020715, 021008, 030329, 030406, 030519B, 031027, and 031111. We found that all their spectra can be fit by the cannonball model, as well as by a Band function.
The Andes. Active Subduction Orogeny Pankhurst, R J; Oncken; Chong; Franz; Giese; Götze; Ramos; Strecker; Wigger, O ; G ; G ; P ; H-J ; V A ; M R ; P
Geological magazine,
03/2008, Letnik:
145, Številka:
2
Journal Article
Recenzirano
Part I ('The Big Picture') has contributions on the large-scale aspects (although the first two deal only with the northern transect): deformation and crustal shortening through time; the space-time ...evolution of volcanic activity and its relationship to deformation; geochemical and isotopic evidence for the recycling and re-working of the basement rocks; seismic analysis of subduction-related deformation, elasticity and mantle viscosity; and high-resolution marine seismic evidence related to the nature of sediment subduction along the Andean chain.
We study \(\pi^0\pi^0\) correlations in the exclusive reaction \(\bar{p}p\to4\pi^0\) at rest with complete reconstruction of the kinematics for each event. The inclusive distribution is fairly flat ...at small invariant mass of the pion pair while a small enhancement in the double differential distribution is observed for small invariant masses of both pion pairs. Dynamical models with resonances in the final state are shown to be consistent with the data while the stochastic HBT mechanism is not supported by the present findings.
GRB 021206 is one of the brightest GRBs ever observed. Its prompt emission, as measured by RHESSI, shows an unexpected spectral feature. The spectrum has a peak energy of about 700 keV and can be ...described by a Band function up to 4.5 MeV. Above 4.5 MeV, the spectrum hardens again, so that the Band function fails to fit the whole RHESSI energy range up to 17 MeV. Nor does the sum of a blackbody function plus a power law, even though such a function can describe a spectral hardening. The cannonball model on the other hand predicts such a hardening, and we found that it fits the spectrum of GRB 021206 perfectly. We also analysed other strong GRBs observed by RHESSI, namely GRBs 020715, 021008, 030329, 030406, 030519B, 031027, 031111. We found that all their spectra can be fit by the cannonball model as well as by a Band function.
The CPLEAR set-up (modified) has been used to determine the K
L–K
S mass difference by a method where neutral-kaon strangeness oscillations are monitored through kaon strong interactions, rather than ...semileptonic decays, thus requiring no assumptions on CPT invariance for the decay amplitudes. The result,
Δm=(0.5343±0.0063
stat±0.0025
syst)×10
10ℏ/s, provides a valuable input for CPT tests.
PDF
![[formula omitted] transitio...](http://api.summon.serialssolutions.com/2.0.0/image/issn/XR4PS5YY4K/0370-2693/small "[formula omitted] transitions monitored by strong interactions: a new determination of the K L–K S mass difference")