First whole atmosphere night-time seeing measurements at Dome C, Antarctica

Details First whole atmosphere night-time seeing measurements at Dome C, Antarctica First whole atmosphere night-time seeing measurements at Dome C, Antarctica

2005-10-14

arxiv.org/abs/astro-ph/0510418v1

Publ.Astron.Soc.Pac.118:344-348,2006

Astronomy and Astrophysics

Astrophysics

accepted for publication in PASP (oct 2005)

Scientific paper

10.1086/498728

We report site testing results obtained in night-time during the polar autumn and winter at Dome C. These results were collected during the first Concordia winterover by A. Agabi. They are based upon seeing and isoplanatic angle monitoring, as well as in-situ balloon measurements 2 of the refractive index structure constant profiles Cn (h). Atmosphere is divided into two regions: (i) a 36 m high surface layer responsible of 87% of the turbulence and (ii) a very stable free atmosphere above with a median seeing of 0.36+-0.19 arcsec at an elevation of h = 30 m. The median seeing measured with a DIMM placed on top of a 8.5 m high tower is 1.3+-0.8 arcsec.

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