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15 papers · 1 filter
The X-ray spectrum of Compton-thick Seyfert 2 Galaxies
Giorgio Matt
Current ideas on the X-ray spectrum of Compton-thick Seyfert 2 galaxies are reviewed, and a brief description of the four presently known sources belonging to this class are given.
Determination of the Longitudinal Proton Structure Function F_L(x,Q^2) at Low x
C. Adloff
A measurement of the inclusive cross section for the deep-inelastic scattering of positrons off protons at HERA is presented at momentum transfers and…
Associated J/psi + gamma Photoproduction as a Probe of the Colour-Octet Mechanism
Matteo Cacciari, Mario Greco, Michael Krämer
The associated production of a J/psi and a photon in photon-hadron collisions is considered, and shown to be a good probe of the presence of colour-octet mediated channels in quark…
Measurement of Charged Particle Transverse Momentum Spectra in Deep Inelastic Scattering
C. Adloff, H1 Collaboration
Transverse momentum spectra of charged particles produced in deep inelastic scattering are measured as a function of the kinematic variables x_B and Q2 using the H1 detector at the…
The QSO evolution derived from the HBQS and other complete QSO surveys
Fabio La Franca, Stefano Cristiani
An ESO Key programme dedicated to an Homogeneous Bright QSO Survey (HBQS) has been completed. 327 QSOs (Mb<-23, 0.3<z<2.2) have been selected over 555 deg^2 with 15<B<18.75. For B<…
The Sunyaev-Zeldovich Effect at 1 and 2 mm towards ROSAT Clusters
P. Andreani, G. Dall'Oglio, L. Pizzo +7
An observing campaign was devoted to the search for the Sunyaev-Zeldovich (S-Z) effect towards X-ray ROSAT Clusters in the millimetric spectral domain. A double channel (1.2 and 2…