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CCD photometry and astrometry of visual double and multiple stars of the HIPPARCOS Catalogue. II. CCD photometry and differential astrometry of 288 southern ``Intermediate'' systems
Cuypers, J.; Seggewiss, W.
We present photometric and astrometric data of about 280 visual double stars of the ``intermediate'' class, i.e. with angular separations mainly in the range 2arcsec < rho < 12arcsec . The observations have been obtained in 1991-92 with a CCD camera attached to the 91 cm Dutch telescope at ESO La Silla, Chile. Differential magnitudes of the …
New spectroscopic components in 8 multiple systems
Tokovinin, A. A.
New close sub-systems are discovered in 8 visual late-type double stars. Elements of spectroscopic orbits (4 double-lined and 4 single-lined) are given for the components of quadruple systems ADS 1134 and 11163, for the components of triple systems ADS 455, 497, 5436, 8236, 10044, and for the primary of the optical pair ADS 9444. Magnitudes, color…
Extension of TYCHO catalog for low-extinction windows in the galactic bulge
Teixeira, R.; Benevides-Soares, P.; Dominici, T. P. +2 more
We present in this work secondary catalogs up to mVal ~ 13 based on the Tycho reference frame (\cite[ESA, 1997]{esa}) for 12 selected low-extinction fields towards the galactic bulge. The observations have been performed with the Askania-Zeiss Meridian Circle equiped with a CCD camera, located at the Abrahão de Moraes Observatory (Valin…
Young massive stars in the ISOGAL survey. I. VLA observations of the ISOGAL l=+45 field
Felli, M.; Testi, L.; Taylor, G. B.
We present VLA radio continuum observations at 3.6 and 6 cm of a ~ 0.65 sq. deg. field in the galactic plane at l=+45(deg) . These observations are meant to be used in a comparison with ISO observations at 7 and 15 mu m of the same region. In this paper we compare the radio results with other radio surveys and with the IRAS-PSC. At 3.6 and/or 6 cm…
Precise GRB source locations from the renewed interplanetary network
Hurley, K.; Kouveliotou, C.; Cline, T. L. +14 more
A new interplanetary network (IPN) is made possible by the modification of the NEAR mission, now at 2 AU distance. With Ulysses and the near-Earth GRB monitors, this fully long-baseline network will produce GRB localizations at a rate of about one per week, with accuracies varying from several to tens of arc minutes. Given the delays inherent in t…
An astrometric catalogue for the area of Coma Berenices
Abad, C.; Vicente, B.
A catalogue of stellar positions and proper motions down to the 14th photographic magnitude in the area of the open cluster in Coma Berenices is compiled from data of 12 different sources. The accuracy of the proper motion data is comparable to that of the Hipparcos Catalogue. The catalogue Table 5 is only available in electronic form at the CDS v…
Near infrared observations of quasars with extended ionized envelopes
Durret, F.; Petitjean, P.; Márquez, I.
We have observed a sample of 15 and 8 quasars with redshifts between 0.11 and 0.87 (mean value 0.38) in the J and K' bands respectively. Eleven of the quasars were previously known to be associated with extended emission line regions. After deconvolution of the image, substraction of the PSF when possible, and identification of companions with the…
The peak flux distribution of bright gamma-ray bursts measured with ULYSSES
Hurley, K.; Atteia, J. -L.; Boër, M.
Observations of gamma-ray burst afterglows have shown that these events come from formidable explosions at cosmological distances. If the most distant GRBs seen by BATSE have redshifts of the order of 3-6 (e.g. GB 971214), it is a coincidence that the bright end of the GRB intensity distribution displays the -3/2 slope expected for a Euclidean dis…
Contribution à l'étude des spectres composites. VIII. HD 174016-7, une étoile Ap associée à une géante G Contribution to the study of composite spectra VIII. HD 174016-7, an Ap star with a giant G
Udry, S.; Griffin, R. F.; Ginestet, N. +1 more
HD 174016-7, listed by \cite[Hynek (1938)]{Hynek} as a star having a composite spectrum, was on our observing programmes of such objects carried out both at the Cambridge Observatories and at the Observatoire Midi-Pyrénées. Most of the observations were made with the CORAVEL spectrovelocimeter of the Swiss telescope at the Observatoire de Haute-Pr…
CCD astrometry of faint compact extragalactic radio sources . I. First results and description of the program
Costa, E.; Loyola, P.
Optical positions relative to the Hipparcos Catalogue (ESA 1997) have been obtained for the optical counterparts of 15 faint (B ~ 20-23) southern compact extragalactic radio sources (CERS). Most of these sources are not adequately observable (or simply not visible) by means of direct photography with a conventional wide-field telescope, so the pos…