1. Astrofísica de altas energias: desenvolvimento do telescópio MASCO e observações de GRO J1744-28 com o telescópio SIGMA - Jorge Mejía Cabeza
Neste trabalho são apresentados resultados correspondentes ao desenvolvimento do telescópio MASCO e à análise de imagens em altas energias da região do Centro Galáctico obtidas com o telescópio SIGMA. O MASCO utiliza uma máscara codificada rotatória MURA 19x19 e foi desenvolvido para obter imagens de alta resolução de fontes cósmicas entre 50 keV e 1,3 MeV, a bordo de balão estratosférico. Descreve-se a implementação dos sistemas mecânico e de controle de atitude, desenvolvidos para satisfazer as condições de vôo e garantir a determinação das coordenadas de apontamento do telescópio com uma precisão inferior 15'. Apresentam-se os resultados da caracterização do...

2. Telescópio Astronômico Refrator -
Este applet simula um telescópio astronômico refrator (invertido) simples, que se constitui em duas lentes denominada objetiva e ocular.

3. Telescopio Astronómico Refractor - tutorbrasil@aulario.universia.net
Este applet simula un telescopio astronómico refractor (invertido) simple, que se constituye en dos lentes denominadas objetiva y ocular.

4. Telescopio Nazionale Galileo - S. Esposito,E. Marchetti,R. Ragazzoni,A. Baruffolo,J. Farinato,L. Fini,A. Ghedina,P. Ranfagni,Francesca Rampazzi
The atmospheric image motion control loop for the 3.6m Telescopio Nazionale Galileo (TNG) has been tested and characterized in lab using a turbulence generator. The tip-tilt sensor is based on four Avalanche Photodiodes and the tilt corrector is a voice coil actuated flat mirror. The feedback network is implemented using a a DSP-based system. We have used the same focal ratios of the beam as it will be experienced by the system at the foci of the TNG telescope. The collected data are time--series useful to perform a Fourier analysis aimed to estimate the effectiveness of the correction. These data can be compared with: theoretical and measured tilt spectra...

5. Telescopio Nazionale Galileo - Roberto Ragazzoni,Francesca Rampazzi
The recovery of absolute tip--tilt information from a LGS--based Adaptive Optics system is (together with conical anisoplanatism) one of the open problems that the LGS community is faced on. Here a number of approaches are discussed in some detail. While there is no evidence that some specific technique is clearly better than the others it is pointed out that a lot of investigation is still required to assess the performances and to eventually point out some new uncovered schemes. 1 The framework A number of optical ground--based telescopes with aperture larger than 6m is going to have its first--light in this turn of century. At the same time Adaptive Optics...

6. Diseño de una montura para telescopio / Jean Francois Dulhoste, Hernán Finol C - Dulhoste, Jean Francois; Finol C., Hernán; Universidad de Los Andes.. Escuela de Ingeniería Mecánica, Tésis, 1989
Mecanografiado

7. Telescopio Nazionale Galileo - Franco Buffa,Ignazio Porceddu,Francesca Rampazzi
Dome seeing may strongly deteriorate the final sharpness of a point source astronomical image, reducing its Image Quality. Both the telescope enclosure and the mirrors may contribute to the dome seeing, if air convection is induced by differences of temperature between them and external air. The prediction of the external air temperature with respect to a given time interval allows one to preset in advance the air conditioning temperature value in the telescope enclosure. With the aim to study the neural networks capabilities and limits to make short term temperature prediction, a few case studies have been carried out by using an autoregressive neural network model. The actual goal...

8. Telescopio Nazionale Galileo - Luca Fini,Piero Ranfagni,Francesca Rampazzi
In the following pages the TNG Tip-Tilt Servo-Loop subsystem is described in general terms from a functional point of view. The loop is based on a completely digital design which is both the natural result of the use of photon counting devices as image motion sensors and the key aspect for the realization of a system which is at the same time extremely flexible and easy to use. The hardware layout is shown with some details on single components at the board level. An overall description of the architecture of software components is also included. 1 Introduction The Tip-Tilt system is the first step (the first-order step, indeed) in the...

9. Telescopio Nazionale Galileo - S. Esposito,A. Riccardi,Francesca Rampazzi
A Zernike decomposition of the pupil phase variance due to focus anisoplanatism for sodium laser guide star has been calculated, including the angular error variance associated with overall tilt. This last quantity, or tilt focus anisoplanatism oe 2 FA;tt , is necessary in evaluating the usefulness of new techniques developed to measure the wave-front tilt from sodium laser guide star. The analytical expression of oe 2 FA;tt in the case of refractive index fluctuation with a Kolmogorov power spectral density is given together with numerical results for two different C 2 n 0 (z) profiles. Numerical calculations show that tilt focus anisoplanatism may be a limitation when using a sodium laser guide star to sense the overall wave-front tilt...

10. Telescopio Nazionale Galileo - E. M. Corsini,A. Pizzella,F. Bertola,Francesca Rampazzi
We measured the velocity curve and the velocity dispersion profile of the ionized gas along the major axis of the edge-on galaxy UGC 10205. The observed kinematics extends up to about 40 00 from the nucleus. In the inner Sigma13 00 of this early-type spiral three kinematically distinct gaseous components are present. We disentangle a fast-rotating and a slow-rotating component. They give to the UGC 10205 velocity curve a "figure-of-eight" appearance. A third velocity component is also detected on the southeast side of the galaxy. Possibly it is produced by gas in non-circular motions. 1 Introduction Within the last year ionized gas kinematics has revealed in a number of edgeon disk galaxies double-peaked emission lines....

11. Telescopio Nazionale Galileo - Fabio Pasian,Osservatorio Astronomico Di Trieste,Francesca Rampazzi
The purpose of this document is to define a number of terms which are specific to data reduction and calibration of scientific data acquired by TNG instruments. 1 Introduction 1.1 Scope The development of an instrument for the TNG [5] requires the existence of different types of software packages, ranging from the control of the instrument itself down to the reduction of the data (to remove the instrument signature and to transform the raw data into physical units). While it has been clearly defined that the control software needs to be integrated inside a well-specified global environment [3] through the development of an ancillary process, no decision has yet been made...

12. Telescopio Nazionale Galileo - F. Vitali,D. Lorenzetti,D. Ferruzzi,E. Oliva,Francesca Rampazzi
We present here a progress report on the results obtained with the infrared grisms for the imaging camera NICS for the GALILEO National Telescope. We have studied and designed four grisms to cover the J, H and K bands at low (R ¸ 500) and intermediate (R ¸ 1000) resolution. All the grisms have been fabricated by Richardson Grating Laboratories (RGL, ex Milton Roy Company) and provided along with their efficiency curve. We have performed further laboratory tests to confirm the RGL curves and to measure how the grism efficiency depends on its inclination with respect to the input optical axis. The results have shown that the...

13. Telescopio Nazionale Galileo - Of The Moon,A. Ghedina,R. Ragazzoni,A. Baruffolo,Francesca Rampazzi
By imaging the edge of the Moon we have tested a seeing monitor able to evaluate the isokinetic patch size. These measurements have a relevant interest because of several Laser Guide Star (LGS) tilt recovery schemes that have been proposed. In our approach the edge of the Moon mimics a LGS as seen far from the laser projector. The conceptual design of the instrument, the data reduction techniques and the preliminary results obtained at the Asiago Astronomical Observatory are given. Because, as a by product, the instrument is able to evaluate r 0 , a comparison with seeing data collected at the 1.82 m telescope of Cima Ekar during the...

14. Telescopio Nazionale Galileo - Roberto Ragazzoni,Enrico Marchetti,Guido Brusa,Francesca Rampazzi
Due to the finite height of the mesospheric sodium laser guide star, it is shown that the measurement of absolute tilt done with the multi-- colour laser star technique is affected by an uncertainty depending upon the C 2 n distribution. Two case studies for D = 3:58 and D = 8:00 meter telescopes are given. 1 Introduction In the next years a number of telescopes with aperture diameter much larger than the existing HST will see their first--light (Mountain, Kurz & Oschmann, 1994). In this framework the Adaptive Optics (AO) technique (Beckers, 1993) can provide a substantial improvement in the resolution of optical imaging in the next decades, provided that a...

15. El gran telescopio Canarias - Rodríguez Espinosa, José Miguel
El pasado semestre ha sido de luces y sombras, de _exitos e incidentes desafortunados. Los 36 segmentos del espejo primario ya est_an en el Observatorio, y su calidad est_a por encima de las expectativas, con 13 nm de error de super_cie cuadr_atico medio. El secundario de Berilio tambi_en se ha terminado y su calidad es excelente; pronto llegar_a al Observatorio. Por su parte el telescopio prosigue su etapa de integraci_on y esperamos estar haciendo pruebas de sus motores cuando este documento salga a la luz. Pero tambi_en ha habido sombras. Un fuego que a mitad de verano tuvo el Observatorio...

16. Análisis y síntesis de estrategias de control para sistemas de larga escala: aplicación al espejo primario del GTC - Sigut Saavedra, Marta
El espejo primario del Gran Telescopio de Canarias es un sistema de gran escala fuertemente acoplado. Este acoplamiento, junto con la alta dimensionalidad de la planta hacen que sea complicado diseñar un controlador multivarible para el espejo del telescopio. Pese a ello se han diseñado diversos controladores atendiendo a una estrategia local-global consistente en la aplicación al sistema de dos acciones de control a distinto nivel. Los objetivos que se plantean son cancelar las oscilaciones del sistema consiguiendo, al mismo tiempo, que éste alcance el estado de consigna en el menor tiempo posible. De entre los controladores multivariables diseñados destaca...

17. Análisis y síntesis de estrategias de control para sistemas de larga escala: aplicación al espejo primario del GTC - Sigut Saavedra, Marta
El espejo primario del Gran Telescopio de Canarias es un sistema de gran escala fuertemente acoplado. Este acoplamiento, junto con la alta dimensionalidad de la planta hacen que sea complicado diseñar un controlador multivarible para el espejo del telescopio. Pese a ello se han diseñado diversos controladores atendiendo a una estrategia local-global consistente en la aplicación al sistema de dos acciones de control a distinto nivel. Los objetivos que se plantean son cancelar las oscilaciones del sistema consiguiendo, al mismo tiempo, que éste alcance el estado de consigna en el menor tiempo posible. De entre los controladores multivariables diseñados destaca...

18. El telescopio MAGIC para Astronomia gamma
MAGIC es un telescopio Cherenkov de nueva generación destinado a detectar rayos cósmicos a bajas energías en el rango 10-30 GeV, llenando el hueco existente entre los telescopios de rayos en satélites y en tierra. En esta contribución resumimos sus innovaciones técnicas, objetivos físicos y el estatus actual del telescopio MAGIC.

19. El gran telescopio europeo: un desafío tecnológico - Borges, Luis
El Telescopio Extremadamente Grande (ELT) es un proyecto conjunto promovido por el Observatorio Austral Europeo (ESO) con la intención de diseñar, estudiar y desarrollar los conceptos y la validación de tecnologías necesarios para permitir a largo plazo el diseño y la construcción de un telescopio gigante europeo en el rango óptico e infrarrojo, con un diámetro inicialmente concebido entre 30 y 100 metros.

20. Simulações do ruído de fundo instrumental e reconstrução de imagens do experimento protoMIRAX - Bárbara Heliodora Gonçalves Rodrigues
Neste trabalho apresenta-se o resultado de simulações computacionais realistas e detalhadas ealizadas com o programa MGGPOD, um conjunto de rotinas Monte Carlo que simula a interação da radiação gama com a matéria, para estimar a resposta do experimento protoMIRAX ao campo externo de radiação. O protoMIRAX é um projeto do grupo de Astrofísica de Altas Energias do INPE, no qual esté sendo desenvolvida uma câmara de raios X duros baseada na técnica de máscara codificada, e que utiliza detectores de estado solido de Telureto de Cádmio e Telureto de Zinco (CZT). A câmara será sensível a raios X no intervalo...

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