Search Publications
Monte Carlo simulations and generation of the SPI response
von Kienlin, A.; Shrader, C. R.; Schanne, S. +13 more
In this paper we discuss the methods developed for the production of the INTEGRAL/SPI instrument response. The response files were produced using a suite of Monte Carlo simulation software developed at NASA/GSFC based on the GEANT-3 package available from CERN. The production of the INTEGRAL/SPI instrument response also required the development of…
Gemini-Phoenix infrared high-resolution abundance analysis of five giants in the bulge globular cluster NGC 6553
Zoccali, M.; Bica, E.; Barbuy, B. +4 more
A detailed abundance analysis of 5 giants of the metal-rich bulge globular cluster NGC 6553 was carried out using high resolution infrared spectra in the H band, obtained at the Gemini-South 8m telescope. JK photometry collected at ESO and VI photometry from the Hubble Space Telescope are used to derive effective temperatures. The present analysis…
Vertical distribution of Galactic disk stars. II. The surface mass density in the Galactic plane
Soubiran, C.; Siebert, A.; Bienaymé, O.
High resolution spectral data of red clump stars towards the NGP have been obtained with the high resolution spectrograph Elodie at OHP for Tycho-2 selected stars. Combined with Hipparcos local analogues, we determine both the gravitational force law perpendicular to the Galactic plane and the total surface mass density and thickness of the Galact…
Joint observations of propagating oscillations with SOHO/CDS and TRACE
Marsh, M. S.; De Moortel, I.; Ireland, J. +1 more
Joint Observing Program (JOP) 83 Solar and Heliospheric Observatory/Coronal Diagnostic Spectrometer (SOHO/CDS) and Transition Region and Coronal Explorer (TRACE) data is analysed for evidence of propagating intensity oscillations along loop structures in the solar corona. A propagating intensity oscillation with a minimum estimated speed of 50-195…
Long period variables detected by ISO in the Small Magellanic Cloud
Blommaert, J. A. D. L.; Omont, A.; van Loon, J. Th. +8 more
This article presents the study of the light-curves extracted from the MACHO database of a sample of stars observed by the Infrared Space Observatory in the Small Magellanic Cloud. These stars belong to the ISO-Mini-Survey catalogue of the Magellanic Clouds (ISO-MCMS, Loup et al. {in preparation}). Most of them are in the asymptotic giant branch (…
Proper motions and velocity asymmetries in the RW Aur jet
Dougados, C.; Cabrit, S.; López-Martín, L.
We present adaptive optics spectro-imaging observations of the RW Aur jet in optical forbidden lines, at an angular resolution of 0.4''. Comparison with HST data taken 2 years later shows that proper motions in the blueshifted and redshifted lobes are in the same ratio as their radial velocities, a direct proof that the velocity asymmetry in this …
The detection of stellar velocity dispersion drops in the central regions of five isolated Seyfert spirals
Roth, M.; Durret, F.; González Delgado, R. M. +5 more
We analyze the kinematics of the central regions of five isolated Seyfert spiral galaxies from the DEGAS sample (four with new data presented in this paper, IC 184, UGC 3223, NGC 2639, NGC 6814, and NGC 6951 from our previous data), by using long slit spectroscopy in the CaII triplet range (at ~8600 Å) obtained with a 4 m-class telescope. A drop o…
IBIS/PICsIT in-flight performances
Foschini, L.; Di Cocco, G.; Malaguti, G. +11 more
PICsIT (Pixellated Imaging CaeSium Iodide Telescope) is the high energy detector of the IBIS telescope on-board the INTEGRAL satellite. PICsIT operates in the gamma-ray energy range between 175 keV and 10 MeV, with a typical energy resolution of 10% at 1 MeV, and an angular resolution of 12 arcmin within a ~ 100 square degree field of view, with t…
The Spiros imaging software for the Integral SPI spectrometer
Connell, P.; Skinner, G.
A key tool in the package of software available for the analysis of data from the SPI spectrometer of Integral is the SPIROS system developed at the University of Birmingham. Although intended primarily for the analysis of point sources and for the extraction of spectral information, SPIROS has many additional capabilities. The software is describ…
The interferometric diameter and internal structure of Sirius A
Bordé, P.; Morel, P.; Kervella, P. +2 more
The interferometric observations of dwarf stars in the solar neighbourhood, combined with HIPPARCOS parallaxes provide very precise values of their linear diameters. In this paper, we report the direct measurement of the angular diameter of the bright star Sirius A with the VINCI/VLTI instrument. We obtain a uniform disk angular diameter of theta_…