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16 papers · 2 filters
BeppoSAX observations of an orbital cycle of the X-ray binary pulsar GX301-2
M. Orlandini, D. Dal Fiume, F. Frontera +4
We present preliminary results on our campaign of observations of the X-ray binary pulsar GX301-2. BeppoSAX observed this source six times in January/February 1998: at the periastr…
The optical/IR counterpart of the 3 July 1998 gamma-ray burst and its evolution
A. J. Castro-Tirado, M. R. Zapatero-Osorio, J. Gorosabel +21
We imaged the X-ray error box of GRB 980703, beginning 22.5 hours after the gamma--ray event, in both the optical R and near-infrared H bands. A fading optical/IR object was detect…
Bounds on hep neutrinos
G. Fiorentini, V. Berezinsky, S. Degl'Innocenti +1
The excess of highest energy solar-neutrino events recently observed by Superkamiokande can be in principle explained by anomalously high -neutrino flux . Without us…
Multifrequency observations of XTE J0421+560/CI Cam in outburst
F. Frontera, M. Orlandini, L. Amati +9
We report on two X-ray observations of the transient source XTE J0421+560 performed by BeppoSAX, and on a series of observations performed by the 0.7m Teramo-Normale Telescope. Out…
Helioseismic tests of diffusion theory
G. Fiorentini, M. Lissia, B. Ricci
We present a quantitative estimate of the accuracy of the calculated diffusion coefficients, by comparing predictions of solar models with observational data provided by helioseism…
Gamma-Ray Burst 980329 and its X-Ray Afterglow
J. J. M. in 't Zand, L. Amati, L. A. Antonelli +16
GRB 980329 is the brightest gamma-ray burst detected so far with the Wide Field Cameras aboard BeppoSAX, both in gamma-rays and X-rays. With respect to its fluence (2.6 X 10**-5 er…