Search Publications
Observations of GRBs with the Infrared Space Observatory
Altieri, B.; Piro, L.; Palazzi, E. +17 more
We present results from the Target of Opportunity (TOO) program to observe GRB locations with the CAM and PHOT instruments aboard the Infrared Space Observatory (ISO). Four BeppoSAX/ GRB error circles were observed by ISO on timescales ranging from days to months after the GRB events. These observations represent the first prompt GRB counterpart s…
CCD measurements of visual double stars made with the 50 CM refractor of the Nice Observatory
Gili, R.; Salaman, M.; Morlet, G.
We present the measurements of 49 visual double stars made in 1997 with the 50 cm refractor of the Nice Observatory (Table 1). A CCD camera was attached to this refractor. Some new binaries discovered by Hipparcos have been measured. The algorithm used for these measurements is based on the adjustment of a tridimensional mathematical surface. Tabl…
Analysis of systematic errors of the photoelectric astrolabe catalog SIPA1
Lu, Chunlin; Xu, Jiayan; Li, Dongming +1 more
Systematic errors of the catalog obtained with the observation of Photoelectic Astrolabe Mark I (PHA I) of Shaanxi Astronomical Observatory, mounted at Irkutsk, Russia, are analyzed with reference to the Hipparcos catalog. It is shown that the systematic errors of the astrolabe catalog can be removed effectively using the Hipparcos Catalog as refe…
Radio star catalogue observed in San Juan (RSSJ95)
Manrique, W. T.; Perdomo, R.; Podesta, R. C. +2 more
Using the data observed in San Juan with the photoelectric Astrolabe Mark II of the Beijing Astronomical Observatory from February, 1992 to March, 1997, the radio star catalogue in San Juan(RSSJ95) has been compiled. There are 69 radio stars in this catalogue. The positions of the radio stars are for the epoch of observation and the equinox J2000.…
Absolute declinations with the photoelectric astrolabe at Calern Observatory (OCA)
Leister, N. V.; Martin, V. A. F.; Vigouroux, G. +2 more
A regular observational programme with a photoelectric astrolabe have been performed at ``Observatoire du Calern" (Observatoire de la Côte d'Azur, OCA, phi = +43() o44‧55.011″; lambda = -0() h27() m42.44() s, Calern, Caussols, France) for the last twenty years. It has been almost fully automatized between 1984 and 1987. Since 1988 the photoelectri…
Parametric representation of helioseismic data. I. A method for estimation of mode correlation
Ferrari, A.; Gelly, B.; Schmider, F. -X. +1 more
This paper describes a parametric method aimed at the estimation of correlation in the excitation of solar p modes. Unlike previous work which investigated the correlation in the statistical properties of the mode's power, rather we study the excitation signal itself. In this approach, each mode is represented as a second-order autoregressive proc…
Optical configuration for a micro-arcsecond astrometric interferometer in space
Vakili, F.; Segransan, D.; Thomas, E. +3 more
One of the ESA candidate cornerstone missions is dedicated to wide-angle astrometry and aims at dramatically increasing the accuracy of astrometric measurements and the limiting magnitude with respect to Hipparcos (ESA Symposium, Venice, 1997). This mission was initially designated by the acronym GAIA (Global Astrometric Interferometer for Astroph…
Observations of radio stars at the Valinhos CCD Meridian Circle
Teixeira, R.; Assafin, M.; Lopes, P. A. A. +6 more
We present the astrometric results from the optical observation of 16 stars from the list of \cite[Wendker (1995)]{wend95}, with detected or suspected radio emission. The results are given on the Hipparcos/Tycho reference frame. The stars are evenly distributed in right ascension and the declinations range from -15.6(deg) to +28.6(deg) . This dist…
The ROSAT all-sky survey catalogue of optically bright main-sequence stars and subgiant stars
Schmitt, J. H. M. M.; Voges, W.; Huensch, M.
We present X-ray data for all main-sequence and subgiant stars of spectral types A, F, G, and K and luminosity classes IV and V listed in the Bright Star Catalogue that have been detected as X-ray sources in the ROSAT all-sky survey; several stars without luminosity class are also included. The catalogue contains 980 entries yielding an average de…
Determination of the temperatures of selected ISO flux calibration stars using the Infrared Flux Method
Lynas-Gray, A. E.; Blackwell, D. E.
Effective temperatures for 420 stars with spectral types between A0 and K3, and luminosity classes between II and V, selected for a flux calibration of the Infrared Space Observatory, ISO, have been determined using the Infrared Flux Method (IRFM). The determinations are based on narrow and wide band photometric data obtained for this purpose, and…