Precise positions of double and multiple systems

One hundred photographic plates obtained at ESO by astronomers from Belgique Royal Obsérvatery have been reduced at La Plata Observatory. The right ascension limit of the surveyed region are 10 hs. to 24 hs. while declination is between -19° and -40°. About 1260 components of double or multiple syst...

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Detalles Bibliográficos
Autores principales: Hormaechea, José Luis, Perdomo, Raúl Aníbal, Ischik, C., Miralles, M.
Formato: Articulo Comunicacion
Lenguaje:Español
Publicado: 1988
Materias:
Astronomía
Galaxia
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/142408
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-142408
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Astronomía
Galaxia
spellingShingle Astronomía
Galaxia
Hormaechea, José Luis
Perdomo, Raúl Aníbal
Ischik, C.
Miralles, M.
Precise positions of double and multiple systems
topic_facet Astronomía
Galaxia
description One hundred photographic plates obtained at ESO by astronomers from Belgique Royal Obsérvatery have been reduced at La Plata Observatory. The right ascension limit of the surveyed region are 10 hs. to 24 hs. while declination is between -19° and -40°. About 1260 components of double or multiple systems have been positioned with estimated accuracy ranging from 0.2" to 1.5". It was not possible to separate components closer than 3", and in these cases positions refer to photocenter. 330 systems are in the separation range 3" to 20"; while 84% are double, 13% triples and 3% with more than three components. To reduce the plates, it was used the linear plate constants method and measurements were made with a Seise 30/30 machine. Reference stars were obtained from SAO catalogue. Reference stars standard coordinates RMS of residuals are between 1" to 1" .5. As several positioned components are also SAO stars it is possible to calculate the differences between our results; and SAO positions; about 90% of these differences are smaller than 2". This is the same order of magnitude of residuals RMS and is the actual precision of SAO catalogue in this moment.
format Articulo
Comunicacion
author Hormaechea, José Luis
Perdomo, Raúl Aníbal
Ischik, C.
Miralles, M.
author_facet Hormaechea, José Luis
Perdomo, Raúl Aníbal
Ischik, C.
Miralles, M.
author_sort Hormaechea, José Luis
title Precise positions of double and multiple systems
title_short Precise positions of double and multiple systems
title_full Precise positions of double and multiple systems
title_fullStr Precise positions of double and multiple systems
title_full_unstemmed Precise positions of double and multiple systems
title_sort precise positions of double and multiple systems
publishDate 1988
url http://sedici.unlp.edu.ar/handle/10915/142408
work_keys_str_mv AT hormaecheajoseluis precisepositionsofdoubleandmultiplesystems
AT perdomoraulanibal precisepositionsofdoubleandmultiplesystems
AT ischikc precisepositionsofdoubleandmultiplesystems
AT mirallesm precisepositionsofdoubleandmultiplesystems
bdutipo_str Repositorios
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