Surface layer seeing at San Pedro Mártir revisited
Por:
Sánchez L.J., Avila R., Agabi A., Azouit M., Cuevas S., Cruz D.X., Cruz-González I., Garfias F., González S.I., Harris O., Masciadri E., Orlov V.G., Ruelas-Mayorga A., Vernin J., VOYTSEKHOVICH, VALERY
Publicada:
1 ene 2007
Resumen:
Results from experiments measuring the contribution of the surface layer (2.3 to 15 m) to the optical seeing at the Observatorio Astronómico Nacional at San Pedro Mártir (OAN-SPM) are reported. Microthermal sensors placed at 7 heights on a 15-m-high instrumented mast were used to measure the structure constant of the refractive index Cn 2. The integrated seeing parameter was measured with a Differential Image Motion Monitor (DIMM) during 23 nights. Log-normal statistics were found for the DIMM seeing with a median value of 0?.84. The surface layer average seeing was found to be 0?.16. The measured optical turbulence of this layer has a mean contribution of 5.2% to the total Cn 2, which corresponds to a mean degradation of 3.2% of the total seeing. These values are similar to those found in other observatories around the world, suggesting that the presence of trees in the OAN-SPM does not have a significant effect on the surface layer seeing.
Filiaciones:
Sánchez L.J.:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo, Postal 70-264, México 04510, D.F., Mexico
Avila R.:
Centro de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México, Morelia, Mexico
Agabi A.:
U.M.R. 6525 Astrophysique, Université de Nice-Sophia Antipolis, CNRS, Nice, France
Azouit M.:
U.M.R. 6525 Astrophysique, Université de Nice-Sophia Antipolis, CNRS, Nice, France
Cuevas S.:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo, Postal 70-264, México 04510, D.F., Mexico
Cruz D.X.:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo, Postal 70-264, México 04510, D.F., Mexico
Cruz-González I.:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo, Postal 70-264, México 04510, D.F., Mexico
Garfias F.:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo, Postal 70-264, México 04510, D.F., Mexico
González S.I.:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo, Postal 70-264, México 04510, D.F., Mexico
Harris O.:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Ensenada, Mexico
Masciadri E.:
Osservatorio Astrofisico di Arcetri, Florence, Italy
Orlov V.G.:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo, Postal 70-264, México 04510, D.F., Mexico
Ruelas-Mayorga A.:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo, Postal 70-264, México 04510, D.F., Mexico
Vernin J.:
U.M.R. 6525 Astrophysique, Université de Nice-Sophia Antipolis, CNRS, Nice, France
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