La Silla Seeing Statistics
La Silla Seeing Statistics
This page contains information about the seeing on La Silla Observatory (ESO, Chile) as reported by the night assistants working in the 4 biggest telescopes (ESO NTT , ESO 3.60m , ESO/MPI 2.20m , DANISH 1.54m) and by the Seeing Monitor (DIMM2) which operates in fully automated mode.
The data is obtained through a gaussian fits along the X and Y axis on stars selected from a CCD frame. The raw data is corrected to get the seeing value at zenith and at 0.5 micron using the following formulae:
seeing(0.5u,zenith)= seeing(measured)*(lambda(Angs.)/5000)^-0.2/airmass^0.6
This mean that a set of homogeneus data is obtained and can be plotted.
All Seeing, as obtained by DIMM2
Main telescopes overplotted.
- Seeing 1999 (gif)
- Seeing 1995 (gif), Seeing 1996 (gif), Seeing 1997 (gif) ,Seeing 1998 (gif)
- Early Years (gif), 1991(data), 1992(data), 1993(data), 1994(data)
