Atmospheric Extinction Coefficients :

TreeLevel: Atmospheric Extinction Coefficients at La Silla, Portal

Monochromatic Atmospheric Extinction Coefficients at La Silla :

This page contains information about the atmospheric extinction coefficients. These values have been determined by using the Swiss Telescope, during the photometrics night, using either a two-channel photelectric photometer(P7) or a CCD camera.

The data is given as values of HJD,Date,kU,kB1,kB,kB2,kV1,kV,kG,kR and kI, where the ki values are the mean extinction in each of the 9 filters ( U B1 B B2 V1 V G R I).

The mean wavelengths of the filters (in Angstrom) are:

      U     B1    B     B2    V1    V     G     R     I 
     
     3464  4015  4227  4476  5395  5488  5807  6760  7610

You can see the data by year and by month:

All Data
Photoelectric Photometer (HiperTables)
- 1991 ,1992 ,1993 ,1994 ,1995 ,1996
CCD Camera (HiperTables).
- 1993 ,1994 ,1995 ,1996

If you want to see an specific night click here

REMARK:

The extinction data will no more delivered to us,now it is available on the GENEVA OBS. WEB PAGE

Reference:

Description of the data reprinted from ESO Messenger No. 80 (June 1995), pages 34, 35, 36.
This article may be copied for further use with the indication of the ESO Messenger as source.

These data are property of the Geneva Observatory Photometric Group. They can be used for the reduction of the data obtained by using ESO Telescopes. They cannot be used without agreement in publications on the Atmospheric Extinction itself.

Last update: 27.06.96. Comments to jnavarre@eso.org.

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