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Comparison of the scintillation noise above different observatories measured with MASS instruments

Kornilov, V. and Sarazin, M. and Tokovinin, A. and Travouillon, T. and Voziakova, O. (2012) Comparison of the scintillation noise above different observatories measured with MASS instruments. Astronomy and Astrophysics, 546 . Art. No. A41. ISSN 0004-6361. https://resolver.caltech.edu/CaltechAUTHORS:20121130-094832049

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Abstract

Aims. Scintillation noise is a major limitation of ground-based photometric precision. Methods. An extensive dataset of stellar scintillation collected at 11 astronomical sites world-wide with MASS instruments was used to estimate the scintillation noise of large telescopes in the fast photometry and traditional long-exposure regime. Results. Statistical distributions of the corresponding parameters are given. The scintillation noise is mostly determined by turbulence and wind in the upper atmosphere and is comparable at all sites, with slightly lower values at Mauna Kea and the highest noise at Tolonchar in Chile. We show that the classical Young’s formula underestimates the scintillation noise. The temporal variations of the scintillation noise are also similar at all sites, showing short-term variability at time scales of 1 − 2 h and slower variations, including marked seasonal trends (stronger scintillation and less clear sky during local winter). Some correlation was found between nearby observatories.


Item Type:Article
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http://dx.doi.org/10.1051/0004-6361/201219954DOIUNSPECIFIED
http://www.aanda.org/index.php?option=com_article&access=doi&doi=10.1051/0004-6361/201219954&Itemid=129PublisherUNSPECIFIED
Additional Information:© 2012 ESO. Article published by EDP Sciences. Received 5 July 2012; Accepted 13 August 2012. Published online 02 October 2012. The authors thank the Sternberg Astromomical Institute MASS group: N. Shatsky, B. Safonov, S. Potanin, M.Kornilov, who provided data from Mt. Shatdzhatmaz. The data for Cerro Tololo and Pachon were obtained from the robotic site monitor operated by the CTIO site testing team. Data from Armazones, Tolar, Tolonchar and Mauna Kea were taken in the framework of the TMT site testing program.
Subject Keywords:techniques: photometric; atmospheric effects; site testing
Record Number:CaltechAUTHORS:20121130-094832049
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20121130-094832049
Official Citation:Comparison of the scintillation noise above different observatories measured with MASS instruments V. Kornilov, M. Sarazin, A. Tokovinin, T. Travouillon and O. Voziakova A&A 546 A41 (2012) DOI: http://dx.doi.org/10.1051/0004-6361/201219954
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35745
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:30 Nov 2012 19:16
Last Modified:03 Oct 2019 04:31

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