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Article
The Digitized First Byurakan Survey Database Late-Type Stars Candidates. New Confirmations. II
Three new carbon C stars was confirmed among the sample of the Late-Type Stars candidates, selected on the Digitized First Byurakan Survey (DFBS) spectral plates. The DFBS is the digitized version of the First...
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Article
The Digitized First Byurakan Survey Data Base. Late-Type Stars Candidates. New Confirmations. I
The Digitized First Byurakan Survey (DFBS) is the digitized version of the First Byurakan Survey (FBS, or Markarian survey). The FBS was the first systematic survey of the extragalactic sky. This objective-pri...
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Article
TYC 1417-891-1 and TYC 1478-742-1: Eclipsing Variable Stars. The Gaia EDR3 and TESS Photometric Data
Based on the TESS (Transiting Exoplanet Survey Satellite) phase dependent light curves, we confirm the eclipsing type variability nature for two G-type dwarfs: TYC 1417-891-1 and TYC 1478-742-1. Both objects s...
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Article
Open AccessHiRISE - High-Resolution Imaging and Spectroscopy Explorer - Ultrahigh resolution, interferometric and external occulting coronagraphic science
Recent solar physics missions have shown the definite role of waves and magnetic fields deep in the inner corona, at the chromosphere-corona interface, where dramatic and physically dominant changes occur. HiR...
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Article
Investigations of the Periodic Variables in the Catalina and Linear Databases
In this study we continue spectral class determinations for large numbers of optically faint periodic variables taken from the Catalina Surveys Data Release 1 (CSDR1) and LINEAR data sets. Spectral classes and...
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Article
A New Version of the SOLAR-ISS Spectrum Covering the 165 – 3000 nm Spectral Region
The accurate measurement of the solar spectrum at the top of the atmosphere and its variability are fundamental inputs for solar physics (Sun modeling), terrestrial atmospheric photochemistry, and Earth’s clim...
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Chapter and Conference Paper
The Interaction of Solar Radiation with Earth’s Atmosphere: Modeling the Total Atmospheric Transmittance by a Regression Function
In this investigation, a numerical simulation has been performed based on the SMARTS2 model to study the influence of the zenith angle on the variation of the total atmospheric transmittances. This calculation...
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Article
New Carbon Stars in the Catalina Catalog of Periodic Variables
This study is about carbon stars detected in a program of spectral type determinations for a large amount of optically faint periodic variables. These variables are taken from the Catalina Survey Data Release-...
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Article
The New SCIAMACHY Reference Solar Spectral Irradiance and Its Validation
This paper describes a new reference solar spectrum retrieved from measurements of the satellite instrument SCIAMACHY in the wavelength region from ...
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Article
A New Solar Spectrum from 656 to 3088 nm
The solar spectrum is a key parameter for different scientific disciplines such as solar physics, climate research, and atmospheric physics. The SOLar SPECtrometer (SOLSPEC) instrument of the Solar Monitoring Obs...
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Article
New CH Carbon Stars Found in the DFBS
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Article
Investigation of Faint Galactic Carbon Stars from the First Byurakan Spectral Sky Survey. III. Infrared Characteristics
InfraRed (IR) astronomical databases, namely, IRAS, 2MASS, WISE, and Spitzer, are used to analyze photometric data of 126 carbon (C) stars whose spectra are visible in the First Byurakan Survey (FBS) low-resol...
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Article
Solar Irradiance from 165 to 400 nm in 2008 and UV Variations in Three Spectral Bands During Solar Cycle 24
Accurate measurements of the solar spectral irradiance (SSI) and its temporal variations are of primary interest to better understand solar mechanisms, and the links between solar variability and Earth’s atmos...
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Article
Solar Spectral Irradiance at 782 nm as Measured by the SES Sensor Onboard Picard
Picard is a satellite dedicated to the simultaneous measurement of the total and solar spectral irradiance, the solar diameter, the solar shape, and to the Sun’s interior through the meth...
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Article
Open AccessOn the Determination and Constancy of the Solar Oblateness
The equator-to-pole radius difference (Δr=R eq−R pol) is a fundamental property of our star, and understanding it will enrich future solar and stellar dynamical models. The solar o...
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Article
SOVAP/Picard, a Spaceborne Radiometer to Measure the Total Solar Irradiance
The Picard spacecraft was successfully launched on 15 June 2010, into a Sun-synchronous orbit. The mission represents one of the European contributions to solar observations and Essential Climate Variables (ECVs)...
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Article
Picard SODISM, a Space Telescope to Study the Sun from the Middle Ultraviolet to the Near Infrared
The Solar Diameter Imager and Surface Mapper (SODISM) onboard the Picard space mission provides wide-field images of the photosphere and chromosphere of the Sun in five narrow bandpasses centered at 215.0, 393.37...
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Article
The Plate Scale of the SODISM Instrument and the Determination of the Solar Radius at 607.1 nm
Knowledge of the Solar Diameter Imager and Surface Mapper (SODISM) plate scale is a fundamental parameter for obtaining the solar radius. We have determined the plate scale of the telescope on the ground and in f...
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Article
On-Orbit Degradation of Solar Instruments
We present the lessons learned about the degradation observed in several space solar missions, based on contributions at the Workshop about On-Orbit Degradation of Solar and Space Weather Instruments that took...
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Article
Identification of Sunspots on Full-Disk Solar Images Using Wavelet Analysis
A new method to detect sunspots on full-disk solar images, recorded in an optical wide spectral band and in the line of Ca ii K1, is presented. It is based on the compact wavelet transform and a process that auto...
