Searching for Transient Pulses with the ETA Radio Telescope

Details Searching for Transient Pulses with the ETA Radio Telescope Searching for Transient Pulses with the ETA Radio Telescope

2008-12-06

arxiv.org/abs/0812.1255v1

ACM Trans.Reconf.Tech.Syst.1:1-19,2009

Astronomy and Astrophysics

Astrophysics

18 pages, 9 figures

Scientific paper

10.1145/1462586.1462589

Array-based, direct-sampling radio telescopes have computational and communication requirements unsuited to conventional computer and cluster architectures. Synchronization must be strictly maintained across a large number of parallel data streams, from A/D conversion, through operations such as beamforming, to dataset recording. FPGAs supporting multi-gigabit serial I/O are ideally suited to this application. We describe a recently-constructed radio telescope called ETA having all-sky observing capability for detecting low frequency pulses from transient events such as gamma ray bursts and primordial black hole explosions. Signals from 24 dipole antennas are processed by a tiered arrangement of 28 commercial FPGA boards and 4 PCs with FPGA-based data acquisition cards, connected with custom I/O adapter boards supporting InfiniBand and LVDS physical links. ETA is designed for unattended operation, allowing configuration and recording to be controlled remotely.

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