@PhDThesis{Silva:2002:MeAnRa,
author = "Silva, Agenor Pina da",
title = "Medidas de anisotropias da radia{\c{c}}{\~a}o c{\'o}smica de
fundo em microondas em m{\'e}dia escala angular nas
frequ{\^e}ncias de 30 GHz e 41 GHz",
school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
year = "2002",
address = "S{\~a}o Jos{\'e} dos Campos",
month = "2002-04-19",
keywords = "anisotropia, radia{\c{c}}{\~a}o c{\'o}smica de fundo em
micro-ondas, cosmologia, mapas, experimentos, anisotropy, cosmic
microwave background radiation, cosmology, maps, experiments.",
abstract = "OBS.: est{\'a} faltando a p{\'a}gina 123 no arquivo digital.
Neste trabalho s{\~a}o apresentados os resultados preliminares da
an{\'a}lise de medidas de anisotropias da
distribui{\c{c}}{\~a}o angular de temperatura da
Radia{\c{c}}{\~a}o C{\'o}smica de Fundo em micro-ondas
(\textit{RCFM}) obtidas com o telesc{\'o}pio \textit{BEAST} nas
frequ{\^e}ncias de 30 GHz (banda K\$_{a}\$) e 41 GHz (banda Q)
e nas escalas angulares de 0,5º e 0,31º, respectivamente. As
sensibilidades do instrumento nas bandas Q e K\$_{a}\$ s{\~a}o
aproximadamente 250 \$\mu\$\textit{K} \$\sqrt{s}\$, e 500
\$\mu\$\textit{K} \$\sqrt{s}\$, respectivamente. Os dados
utilizados s{\~a}o provenientes de duas campanhas observacionais
realizadas nas localidades de Fort Sumner e White Mountain
Research Station, ambas nos EUA. A campanha de Fort Sumner foi
utilizada para calibrar os receptores e testar as v{\'a}rias
partes integrantes do experimento. Os dados da campanha
observacional realizada em White Mountain Research Station foram
analisados e os resultados s{\~a}o apresentados neste trabalho.
Foram produzidos mapas de anisotropias da \textit{RCFM}, nas
frequ{\^e}ncias de 30 GHz e 41 GHz, que cobrem uma {\'a}rea
correspondente a aproximadamente 4\% da esfera celeste para o dia
20 de setembro de 2001 com aproximadamente 15 horas de
observa{\c{c}}{\~a}o. Estes mapas mostram medidas de temperatura
na \textit{RCFM} (20 < 1 < 500) de T\$_{RMS}\$ \$\approx\$
(30 \$\pm\$ 2) \$\mu\$\textit{K}K, na banda Q, e de
T\$_{RMS}\$ \$\approx\$ (139 \$\pm\$ 10)
\$\mu\$\textit{K}, na banda K\$_{a}\$. Adicionalmente foram
gerados mapas combinados (soma e subtra{\c{c}}{\~a}o) para as
duas frequ{\^e}ncias com 12 dias de observa{\c{c}}{\~a}o. Esses
mapas mostram um excesso de sinal de 180 \$\mu\$\textit{K}.
{\'E} apresentado ainda o software que simula as miss{\~o}es do
experimento \textit{BEAST}. Esse software foi desenvolvido para
que fosse poss{\'{\i}}vel prever o comportamento do experimento
\textit{BEAST} durante as observa{\c{c}}{\~o}es, otimizar a
estrat{\'e}gia de coleta de dados das v{\'a}rias miss{\~o}es
observacionais e ajudar no entendimento dos processos de
redu{\c{c}}{\~a}o e an{\'a}lise de dados reais. Esse simulador
permite testar v{\'a}rias configura{\c{c}}{\~o}es do
experimento para uma determinada miss{\~a}o, tal como a
estrat{\'e}gia de varredura do c{\'e}u a ser empregada, e
estimar as contribui{\c{c}}{\~o}es devidas {\`a}s emiss{\~o}es
Gal{\'a}ctica e atmosf{\'e}rica, e aos ru{\'{\i}}dos branco e
1/f. ABSTRACT: This work presents preliminary results of
measurements of anisotropies in the angular distribution of the
Cosmic Microwave Background Radiation (CMBR), obtained with the
BEAST telescope at the frequencies of 30 GHz (K\$_{a}\$ band)
and 41 GHz (Q band), in angular scales of 0.5 degree and 0.31
degree, respectively. The instrument sensitivities are 250
\$\mu\$\textit{K} \$\sqrt{s}\$, for the 30 GHz (Q-band) and
500 \$\mu\$\textit{K} \$\sqrt{s}\$, for the 41 GHz
(K\$_{a}\$-band), respectively. The data used in this work
correspond to two observational campaigns carried out in Fort
Summer and White Mountain Research Station, both in the USA. The
Fort Sumner (FS) mission was conducted mainly to calibrate the
receivers in situ and to test the various subsystems of the
experiment. The White Mountain campaign data corresponding to 15
hours of effective observing time in 20 September, 2001, were
analized and the corresponding results are presented. Maps of CMBR
anisotropies were produced at 30 GHz and 41 GHz, covering,
approximately, 4\% of the celestial sphere area (\$\sim\$ 1700
sq. deg.). The analysis of these maps shows CMBR temperature
measurements (20 < 1 < 500) of T\$_{RMS}\$ \$\approx\$ (30
\$\pm\$ 2) \$\mu\$\textit{K} in the Q-band and
T\$_{RMS}\$ \$\approx\$ (139 \$\pm\$ 10)
\$\mu\$\textit{K} in the K\$_{a}\$-band. Adicionally,
combined maps were produced (summed and substracted maps) in two
frequencies, both of them corresponding to 12 days of observation.
Those maps show a signal excess of 180 \$\mu\$\textit{K}. In
the other hand, a mission simulator for the BEAST experiment is
presented. It was developed in order to forecast BEAST's behavior
during a given mission, optimize the data taking strategy for
different missions, and to help in the understanding of real data
reduction and analysis issues. The simulator allows for the
testing of various configurations for a given mission, such as sky
scan strategies, and for the estimation of Galactic, atmospheric
and noise contributions to the observed signals emissions.",
committee = "Vilas Boas, Jos{\'e} Williams dos Santos (presidente) and Villela
Neto, Thyrso (orientador) and Souza, Carlos Alexandre Wuensche de
(orientador) and Fria{\c{c}}a, Am{\^a}ncio Cesar Santos and
Pellegrini, Paulo S{\'e}gio de Souza and Figueiredo Filho, Newton
de",
copyholder = "SID/SCD",
englishtitle = "Anisotropy measurements of the cosmic microwave background
radiation at intermediate angular scale at 30 GHz and 42 GHz",
label = "9962",
language = "pt",
pages = "165",
ibi = "6qtX3pFwXQZ3r59YCT/H3D69",
url = "http://urlib.net/ibi/6qtX3pFwXQZ3r59YCT/H3D69",
targetfile = "publicacao.pdf",
urlaccessdate = "02 maio 2024"
}