Astronomy and Astrophysics
Aims: This work presents an original readout modulation method developed to improve the sky signal reconstruction accuracy for types of instruments for which a fast sampling frequency is required, both to remove atmospheric fluctuations and to perform full spectroscopic measurements on each sampled sky position.
Methods: We first demonstrate the feasibility of this technique using simulations. We then apply such a scheme to on-sky calibration.
Results: We show that the sky signal can be reconstructed to better than 0.5% for astrophysical sources, and to better than 2% for large background variations such as in "skydip", in an ideal noiseless scenario. The readout modulation method is validated by observations on-sky during the KISS commissioning campaign.
Conclusions: We conclude that accurate photometry can be obtained for future KID-based interferometry using the MPI.

El objetivo general de este proyecto es determinar y estudiar las variaciones espaciales y espectrales en la temperatura del Fondo Cósmico de Microondas y en su Polarización en un amplio rango de escalas angulares que van desde pocos minutos de arco hasta varios grados. Las fluctuaciones primordiales en la densidad de materia, que dieron origen a

QUIJOTE es un programa de dos telescopios y su batería de instrumentos, instalados en el Observatorio del Teide, dedicados fundamentalmente a la caracterización de la polarización del Fondo Cósmico de Microondas, en el rango de frecuencias de 10-42 GHz.