3.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- National Institute for AstrophysicsIT865 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
- Astrophysique, Instrumentation et ModélisationFR332 papers
- California Institute of TechnologyUS323 papers
- Université Paris CitéFR321 papers
- Arcetri Astrophysical ObservatoryIT317 papers
- University College LondonGB308 papers
16 papers · 1 filter
The identification of the optical/IR counterpart of the 15.8-s transient X-ray pulsar XTE J1946+274
F. Verrecchia, G. L. Israel, I. Negueruela +7
We report on the discovery of the optical/IR counterpart of the 15.8s transient X-ray pulsar XTE J1946+274. We re-analysed archival BeppoSAX observations of XTE J1946+274, obtainin…
The Faint Optical Afterglow and Host Galaxy of GRB 020124: Implications for the Nature of Dark Gamma-Ray Bursts
E. Berger, S. R. Kulkarni, J. S. Bloom +24
We present ground-based optical observations of GRB 020124 starting 1.6 hours after the burst, as well as subsequent Very Large Array (VLA) and Hubble Space Telescope (HST) observa…
GRB 010921: Strong Limits on an Underlying Supernova from HST
P. A. Price, S. R. Kulkarni, B. P. Schmidt +24
GRB 010921 was the first HETE-2 GRB to be localized via its afterglow emission. The low-redshift of the host galaxy, z=0.451, prompted us to undertake intensive multi-color observa…
BeppoSAX Wide Field Cameras observations of six type I X-ray bursters
R. Cornelisse, F. Verbunt, J. J. M. in 't Zand +7
We have discovered three certain (SAX J1324.5-6313, 2S 1711-339 and SAX J1828.5-1037) and two likely (SAX J1818.7+1424 and SAX J2224.9+5421) new thermonuclear X-ray burst sources w…
X-ray spectral diagnostics of the immediate environment of GRB 991216
D. R. Ballantyne, E. Ramirez-Ruiz, D. Lazzati +1
The recent report of iron line features in the afterglow of the gamma-ray burst (GRB) 991216 has important implications for the properties of the radiating material and hence the n…
The Chemical Yields Produced by Zero Metal Massive Stars
Marco Limongi, Alessandro Chieffi
In this review we compare the three existing sets of theoretical yields of zero metal massive stars available in the literature. We also show how each of these three different sets…
The complex iron line in NGC 7469 observed by BeppoSAX
A. De Rosa, A. C. Fabian, L. Piro
In this letter we present analysis of BeppoSAX data from a long look at the Seyfert 1 galaxy NGC 7469. The presence of a soft excess below 0.8 keV is confirmed by our analysis and…
The nature of the X-ray transient SAX J1711.6-3808
J. J. M. in 't Zand, C. B. Markwardt, A. Bazzano +8
SAX J1711.6-3808 is an X-ray transient in the Galactic bulge that was active from January through May of 2001 and whose maximum 1-200 keV luminosity was measured to be 5X10-9 erg/s…
Theoretical isochrones in several photometric systems I. Johnson-Cousins-Glass, HST/WFPC2, HST/NICMOS, Washington, and ESO Imaging Survey filter sets
L. Girardi, G. Bertelli, A. Bressan +5
We provide tables of theoretical isochrones in several photometric systems. To this aim, the following steps are followed: (1) First, we re-write the formalism for converting synth…
The lithium content of the globular cluster NGC 6397
P. Bonifacio, L. Pasquini, F. Spite +16
We make use of high resolution, high signal-to-noise ratio spectra of 12 turn-off stars in the metal-poor globular cluster NGC 6397 to measure its lithium content. We conclude that…
The BeppoSAX broad-band spectrum and variability of the Seyfert 1 NGC 3783
A. De Rosa, L. Piro, F. Fiore +5
BeppoSAX observed the Seyfert 1 galaxy NGC 3783 for ~ 5 days from 1998 June 6 to 1998 June 10. The average flux during the observation was F(2-10 keV) ~ 6 X 10^{-11} erg cm^-2 s^-1…
X-Ray Spectroscopy of Gamma-Ray Bursts
Luigi Piro
Observational evidence of iron absorption and emission lines in X-ray spectra of Gamma-Ray Bursts is quite compelling. I will briefly review the results, summarize different models…
Detection of a supernova signature associated with GRB 011121
J. S. Bloom, S. R. Kulkarni, P. A. Price +20
Using observations from an extensive monitoring campaign with the Hubble Space Telescope we present the detection of an intermediate-time flux excess which is redder in color relat…
X-ray spectroscopy of NGC 5548
J. S. Kaastra, K. C. Steenbrugge, A. J. J. Raassen +5
We analyze the high-resolution X-ray spectrum of the Seyfert 1 galaxy NGC 5548, for the full 0.1-10 keV band, using improved calibration results of the Chandra-LETGS instrument. Th…
Short GRBs and Mergers of Compact Objects: Observational Constraints
Rosalba Perna, Krzysztof Belczynski
GRB data accumulated over the years have shown that the distribution of their time duration is bimodal. While there is some evidence that long bursts are associated with star-formi…
Chandra Observation of a 300 kpc Hydrodynamic Instability in the Intergalactic Medium of the Merging Cluster of Galaxies A3667
Pasquale Mazzotta, Roberto Fusco-Femiano, Alexey Vikhlinin
We present results from the combination of two Chandra pointings of the central region of the cluster of galaxies A3667. From the data analysis of the first pointing Vikhlinin et a…