Impact of the microseismic activity on the VLT interferometer.

Details Impact of the microseismic activity on the VLT interferometer. Impact of the microseismic activity on the VLT interferometer.

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995msngr..79....4k&link_type=abstract

The Messenger, vol. 79, p. 4-9

Computer Science

Performance

Seismicity: Vlt

Scientific paper

In a previous article ("Hunting the Bad Vibes at Paranal", Messenger No. 76 - June 1994), we described the approach followed by ESO to investigate the effect of microseismic noise on the VLT Interferometer (VLTI). In section 4 of that article, we presented a measurement campaign performed at Paranal to precisely characterise the natural microseismic activity in view of assessing its impact on the VLTI performance. At that date, only preliminary results were availableand presented. This article presents the final results of this campaign which provide the statistical characterisation of the micro-activity as seen from Paranal, as well as the evaluation of its impact on the stability of the Optical Path Length inside the VLT 8- m telescope.

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