3.6k citations
- National Institute for AstrophysicsIT864 papers
- Centre National de la Recherche ScientifiqueFR635 papers
- Astronomical Observatory of RomeIT475 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR368 papers
- Brera Astronomical ObservatoryIT355 papers
- Goddard Space Flight CenterUS343 papers
- University of PaduaIT336 papers
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- University College LondonGB308 papers
28 papers · 1 filter
Mixing, Enhanced Helium and Blue Tails in Globular Clusters
V. Caloi
We investigate the consequences of an increase in the envelope helium abundance of pre-helium flash red giants in globular clusters. Comparing predictions with the CM diagrams of a…
Discovery of a Transient Absorption Edge in the X-ray Spectrum of GRB 990705
L. Amati, F. Frontera, M. Vietri +18
We report the discovery of a transient equivalent hydrogen column density with an absorption edge at ~3.8 kiloelectron volts in the spectrum of the prompt x-ray emission of gamma-r…
Astronomical x-ray polarimetry based on photoelectric effect with microgap detectors
Paolo Soffitta, Enrico Costa, Giuseppe di Persio +7
The polarisation of x-ray photons can be determined by measuring the direction of emission of a K-shell photoelectron. Effective exploitation of this effect below 10 keV would allo…
BeppoSAX confirmation of beamed afterglow emission from GRB990510
Elena Pian, Paolo Soffitta, Alessandro Alessi +8
We compare the prompt X-ray (2-10 keV) emission of GRB990510 measured by the BeppoSAX Wide Field Cameras (WFC) during the burst to the X-ray afterglow detected by the BeppoSAX Narr…
The broad-band spectrum of 3C 120 observed by BeppoSAX
A. A. Zdziarski, P. Grandi
We study a broad-band X-ray observation by BeppoSAX of the broad-line radio galaxy 3C 120. The primary X-ray continuum is well described by a power law with the photon index of Gam…
The Giant Flare of 1998 August 27 from SGR 1900+14: I. An Interpretive Study of BeppoSAX and Ulysses Observations
M. Feroci, K. Hurley, R. Duncan +1
The giant flare of 1998 August 27 from SGR 1900+14 was extraordinary in many ways: it was the most intense flux of gamma rays ever detected from a source outside our solar system;…