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39 papers · 1 filter
The O-Na and Mg-Al Anticorrelations in Turn-Off and early Subgiants in Globular Clusters
R. G. Gratton, P. Bonifacio, A. Bragaglia +16
High dispersion spectra (R>40,000) for a quite large number of stars at the main sequence turn-off and at the base of the subgiant branch in NGC6397 and NGC6752 were obtained with…
UVES-VLT Observations of the OIII Bowen Lines in RR Tel
Pierluigi Selvelli, Piercarlo Bonifacio
The exceptional resolution of UVES has allowed the detection of weak spectral features and the separation of components in blended lines. The intensities of all of the OIII fluores…
Optical/Infrared Survey of Galaxy Clusters
Luiz da Costa, S. Arnouts, S. Bardelli +13
In this contribution the ongoing effort to build a statistical sample of clusters of galaxies over a wide range of redshifts to study the evolution of clusters and member galaxies…
The Intracluster Medium in z > 1 Galaxy Clusters
S. A. Stanford, B. Holden, P. Rosati +4
The Chandra X-ray Observatory was used to obtain a 190 ks image of three high redshift galaxy clusters in one observation. The results of our analysis of these data are reported fo…
First Results from the SPICES Survey
Daniel Stern, Andrew Connolly, Peter Eisenhardt +7
We present first results from SPICES, the Spectroscopic, Photometric, Infrared-Chosen Extragalactic Survey. SPICES is comprised of four ~30 square arcminute high Galactic latitude…
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…