Seeing and atmospheric extinction at Mt. Maidanak observatory from observations with the 1.5-m AZT-22 telescope

Details Seeing and atmospheric extinction at Mt. Maidanak observatory from observations with the 1.5-m AZT-22 telescope Seeing and atmospheric extinction at Mt. Maidanak observatory from observations with the 1.5-m AZT-22 telescope

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010arep...54.1019a&link_type=abstract

Astronomy Reports, Volume 54, Issue 11, pp.1019-1031

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We have determined the realistic seeing of the 1.5-m AZT-22 telescope of the Mt. Maidanak Observatory (Astronomical Institute, Uzbek Academy of Sciences) using more than 20 000 CCD frames with stellar images in the UBV RI bands acquired in 1996-2005: ɛ = 1.065″ in the V band. The characteristic seeing reduced to unit air mass, ɛ {/med V }( M( z) = 1), is 0.945″. We derived color equations for the CCD detectors used with the telescope. Atmospheric-extinction coefficients in different photometric bands were also determined. The mean V -band atmospheric extinction is 0.20 m ± 0.04 m . The time needed for the conditions to settle, in the free atmosphere as well as inside the telescope dome, is 2-2.5 hours after the end of astronomical twilight. For nights with ɛ {/med V } > 0.9″, we find a persistent difference between the seeing found at this telescope and measured simultaneously with a differential image motion monitor, amounting to ˜0.1 m .

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