Digitalized reduction of interferograms

The factibility of the reduction of interferograms obtained with the fixed-gap Fabry-Perot etalon of Córdoba Observatory by using a digitalized Hilger-Watts microdensitometer is analyzed. For this purpose, radial velocities of an in-rest comparison source were calculated, following the method propos...

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Autores principales: Goldes, Guillermo, Carranza, Gustavo José
Formato: Articulo Comunicacion
Lenguaje:Español
Publicado: 1990
Materias:
Astronomía
Galaxia
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/142862
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-142862
record_format dspace
spelling I19-R120-10915-1428622024-04-30T18:18:02Z http://sedici.unlp.edu.ar/handle/10915/142862 Digitalized reduction of interferograms Goldes, Guillermo Carranza, Gustavo José 1990 2022-09-28T13:06:30Z es Astronomía Galaxia The factibility of the reduction of interferograms obtained with the fixed-gap Fabry-Perot etalon of Córdoba Observatory by using a digitalized Hilger-Watts microdensitometer is analyzed. For this purpose, radial velocities of an in-rest comparison source were calculated, following the method proposed by Courtés. The complete procedure is thoroughly similar to the one used for reducing nebular observations, both in the observational and numerical aspects. So, it allows us to obtain a realistic and accurate estimation of the uncertainties we are dealing with in practical work. The task was done by using plates exposed in the 1.54 m reflector at Bosque Alegre with the aid of a focal reducer and interference filters. On these plates, diametral scannings with the microdensitometer were done, in order to obtain radial profiles. Different spot dimensions and also different values of amplification of the signal were used. The maxima of the profiles were adjusted by polinomyals for calculating their mean coordinates. After that, the calculation of radial velocities for different points of the interferograms was done with the Micro Vax II system of the O.A.C. A brief comparative discussion of the reduction techniques and of the results achieved with the microdensitometer and with a hand-operated measuring machine is performed. Also, some other applications of digital methods (like bidimensional scanning) are discussed. Asociación Argentina de Astronomía Articulo Comunicacion http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf
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
Goldes, Guillermo
Carranza, Gustavo José
Digitalized reduction of interferograms
topic_facet Astronomía
Galaxia
description The factibility of the reduction of interferograms obtained with the fixed-gap Fabry-Perot etalon of Córdoba Observatory by using a digitalized Hilger-Watts microdensitometer is analyzed. For this purpose, radial velocities of an in-rest comparison source were calculated, following the method proposed by Courtés. The complete procedure is thoroughly similar to the one used for reducing nebular observations, both in the observational and numerical aspects. So, it allows us to obtain a realistic and accurate estimation of the uncertainties we are dealing with in practical work. The task was done by using plates exposed in the 1.54 m reflector at Bosque Alegre with the aid of a focal reducer and interference filters. On these plates, diametral scannings with the microdensitometer were done, in order to obtain radial profiles. Different spot dimensions and also different values of amplification of the signal were used. The maxima of the profiles were adjusted by polinomyals for calculating their mean coordinates. After that, the calculation of radial velocities for different points of the interferograms was done with the Micro Vax II system of the O.A.C. A brief comparative discussion of the reduction techniques and of the results achieved with the microdensitometer and with a hand-operated measuring machine is performed. Also, some other applications of digital methods (like bidimensional scanning) are discussed.
format Articulo
Comunicacion
author Goldes, Guillermo
Carranza, Gustavo José
author_facet Goldes, Guillermo
Carranza, Gustavo José
author_sort Goldes, Guillermo
title Digitalized reduction of interferograms
title_short Digitalized reduction of interferograms
title_full Digitalized reduction of interferograms
title_fullStr Digitalized reduction of interferograms
title_full_unstemmed Digitalized reduction of interferograms
title_sort digitalized reduction of interferograms
publishDate 1990
url http://sedici.unlp.edu.ar/handle/10915/142862
work_keys_str_mv AT goldesguillermo digitalizedreductionofinterferograms
AT carranzagustavojose digitalizedreductionofinterferograms
_version_ 1807220691624263680

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