Angular resolution at map level in the QUBIC instrument
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Asociación Argentina de Astronomía
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Desde su descubrimiento en los años 1960, el fondo cósmico de microondas (CMB, por sus siglas en ingles) se ha convertido en una importante herramienta observacional para entender la física del universo temprano. El parámetro r, definido como la amplitud de las perturbaciones tensoriales relativas a las escalares, está acotado actualmente al rango r < 0.056. QUBIC es un instrumento terrestre diseñado para buscar señales muy débiles de los modos B en las anisotropías de la polarización a escalas angulares intermedias (l ∼ 30 − 200). Para lograr este objetivo, QUBIC combina dos técnicas muy usadas en la comunidad CMB: interferometría y bolometría. En este trabajo calculamos la resolución angular de una simulación end-to-end con dos métodos independientes: Fit y Sigma. Concluimos que la reconstrucción que realiza el software es apropiada ya que la resolución medida con ambos métodos calibrados coincide con los valores teóricos de la resolución esperada.
Since its discovery in the 1960s, the cosmic microwave background (CMB) radiation has become a very important observational tool to understand the physics of the early universe. The parameter r, defined as the relative amplitude of tensor to scalar perturbations, is currently constrained to the range r < 0.056. QUBIC is a ground-based instrument designed to search for very weak B-mode signals in polarization anisotropies at intermediate angular scales (l ∼ 30 − 200). To achieve this goal, QUBIC combines two widely used techniques in the CMB community: interferometry and bolometry. In this work, we compute the angular resolution for an end-to-end simulation using two independent methods: Fit and Sigma. We conclude that the reconstruction performed by the software is appropriate since the resolution measured with both calibrated methods coincides with the theoretical value of the expected resolution.
Since its discovery in the 1960s, the cosmic microwave background (CMB) radiation has become a very important observational tool to understand the physics of the early universe. The parameter r, defined as the relative amplitude of tensor to scalar perturbations, is currently constrained to the range r < 0.056. QUBIC is a ground-based instrument designed to search for very weak B-mode signals in polarization anisotropies at intermediate angular scales (l ∼ 30 − 200). To achieve this goal, QUBIC combines two widely used techniques in the CMB community: interferometry and bolometry. In this work, we compute the angular resolution for an end-to-end simulation using two independent methods: Fit and Sigma. We conclude that the reconstruction performed by the software is appropriate since the resolution measured with both calibrated methods coincides with the theoretical value of the expected resolution.
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cosmic background radiation, early universe, instrumentation: interferometers, Astronomía, Ciencias Físicas, CIENCIAS NATURALES Y EXACTAS
