News Archive

Application of Neural Networks to Estimation and Prediction of Seeing at the Large Solar Telescope Site. A.Yu. Shikhovtsev, P.G. Kovadlo, A.V. Kiselev, M.V. Eselevich, V.P. Lukin. Publications of the Astronomical Society of the Pacific (2023)

Optical turbulence limits the angular resolution of ground-based astronomical telescopes. The key parameter of optical turbulence is seeing. In this study, seasonal variations of seeing estimated from differential image motion monitor measurements at the Large Solar Telescope site are discussed. 

Removal of the Ambient Air Features from Fourier-Transform Near-Infrared Spectra D. Kojić, A.A. Simonova, M. Yasui. Journal of Quantitative Spectroscopy & Radiative Transfer (2023)

A vast majority of near-infrared spectrometers operate in ambient air conditions.
Ambient air bands infiltrate spectra and deteriorate signal extraction.
Recent advances in modeling spectra of ambient air allow for precise compensation.
We propose a correction procedure based on physics-informed baseline fitting.
Removal of ambient air bands is required in demanding spectral applications.

Deadline of paper submission for XXIX International Symposium on Atmospheric and Ocean Optics extended

The final deadline of paper submission for XXIX International Symposium on Atmospheric and Ocean Optics, originally scheduled to March 1, 2023, has been extended to March 15, 2023.
 

AI-3000K Infrared line list for hot CO2. X.Huang, R.S. Freedman, S. Tashkun, D.W. Schwenke, T. J. Lee. Journal of Molecular Spectroscopy, 392

Hot CO₂ IR line list covering 0 – 20,000 cm⁻¹ and up to 3000 K.

Open-acess paper: Atmospheric Research for Adaptive Optics. L.A. Bolbasova and V.P. Lukin. Atmospheric and Oceanic Optics. Vol. 35, No. 3, p. 288–302 (2022)

Adaptive optics (AO) systems are an essential part of large astronomical telescopes and laser complexes operating through the atmosphere. Each AO system is individually designed; the requirements for the components and the performance of an AO system are determined by the intensity and distribution of turbulent fluctuations of the air refractive index over the radiation propagation path. In this work, we review the techniques and instruments for measuring and forecasting atmospheric conditions for AO, including devices and techniques developed at the Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences. The basic principles of atmospheric AO and the related atmospheric parameters are briefly described. Particular attention is paid to the parameter used for the estimation of capabilities of AO systems, i.e., the wind speed at a level of 200 hPa. The comparison with the data from foreign astronomical observatories is carried out. The necessity for atmospheric research for large Russian astronomical observatories is discussed.

Led-based Fourier spectroscopy of HD17O in the range of 10000–11300 cm–1. Analysis of the 3ν3 band. Sinitsa L.N., Serdyukov V.I., Polovtseva E.R., Bykov A.D., Scherbakov A.P. Journal of Quantitative Spectroscopy & Radiative Transfer. 294 (2023)

The absorption spectrum of the HD¹⁷О molecule have been studied in the range 10,000-11,300 cm⁻¹ for the first time.
New 698 transitions to the (003) upper vibrational state have been determined.
New 139 energy levels were obtained.

Russian Science Day

Science Day is celebrated in Russia on February 8. 

For pioneering work in laser physics, Dr. Maxim Trigub is awarded the Professor V.S. Letokhov Medal of the D.S. Rozhdestvensky Optical Society.

V.V. Nosov, V.P. Lukin, P.G. Kovadlo, E.V. Nosov, A.V. Torgaev. Proof of Hopf's conjecture on the structure of turbulence (Tatarsky's memory). Optika Atmosfery i Okena Vol. 36, No. 1. Open access paper (Russian version)