The Nançay Radio Telescope
The primary reflector of the Nançay Radio Telescope
The primary reflector of the Nançay Radio Telescope

The Nançay Decimetric Radio Telescope (NRT), at the Station de Radioastronomie de Nançay, is a single-dish antenna with a collecting area of 6912 m², equivalent to that of a 94-m-diameter parabolic dish. The half-power beam width at 21 cm is 3.6 arcmin (E-W) x 22 arcmin (N-S) (at zero declination). The system temperature at a declination of 15° is about 35 K at 1.4 GHz in both horizontal and vertical polarisations. The frequency covergage of the new receiver is continuous from 1.1 GHz up to 3.5 GHz and offers full polarisation measurements. The telescope can observe any source above -39° in declination. Due to its meridional nature, it can track a given source for about one hour.

The Nançay Radio Telescope, full view
The Nançay Radio Telescope, full view

The NRT pulsar backend uses CASPER-Berkeley technology for the spectrometer/filterbank board and a GPU-based (graphical processing unit) cluster for coherent dedispersion and folding. The present state of the instrumentation allows 128 MHz of bandwidth, divided into 32 4-MHz frequency channels with two complex polarisation channels. Please visit the Nançay Radio Telescope website for more information.