Rene Laporte's research while affiliated with National Institute for Space Research, Brazil and other places

Publications (3)

Article
Full-text available
This paper presents a new Tunable Filter Instrument for the SOAR telescope. The Brazilian Tunable Filter Imager (BTFI) is a versatile, new technology, tunable optical imager to be used in seeing-limited mode and at higher spatial fidelity using the SAM Ground-Layer Adaptive Optics facility at the SOAR telescope. The instrument opens important new s...
Conference Paper
Full-text available
We present the basic concept of a new astronomical instrument: SPARC4 - Simultaneous Polarimeter and Rapid Camera in 4 bands. SPARC4 combines in one instrument: (i) photometric and polarimetric modes; (ii) sub-second time-resolution in photometric mode and excellent time-resolution in polarimetric mode; (iii) simultaneous imaging in four broad-band...
Article
A scientific and engineering team led by the Department of Astronomy of the IAG, at the University of São Paulo, is engaged in the development of a highly versatile, new technology, optical imaging interferometer to be used both in seeing-limited mode and at high spatial resolution using the SOAR Adaptive Optics Module (SAM: the GLAO facility for t...

Citations

... The Brazilian Tunable Filter Imager (BTFI) is a versatile instrument to be used both in seeing-limited mode and at higher spatial fidelity using the SAM Ground-Layer Adaptive Optics facility (SOAR Adaptive Module) which is being deployed at the SOAR telescope. The imaging Bragg Tunable Filter (iBTF) concept utilizes Volume Phase Holographic Gratings in a double-pass configuration as a tunable filter, while the Fabry-Perot concept allows a single etalon to act over a very large range of interference orders and hence spectral resolutions [2]. ...
... For the acquisition in each channel, there is a dedicated iXon Ultra EMCCD, produced by Andor Technology. 4 These devices have an optical window and coating optimized for the spectral range in which they were designed to operate. 1 These cameras also have frame transfer and electron-multiplying capabilities, allowing acquisition rates (AR) of up to 26 fps full-frame (1024 x 1024 pixels) even on faint astronomical objects, which requires high sensitivity for short exposure times. ...