A tomographic algorithm to determine tip-tilt information from laser guide stars
Laser Guide Stars (LGS) have greatly increased the sky-coverage of Adaptive Optics (AO) systems. Due to the up-link turbulence experienced by LGSs, a Natural Guide Star (NGS) is still required,...
View ArticleFocal plane wavefront sensor achromatization : The multireference...
High contrast imaging and spectroscopy provide unique constraints for exoplanet formation models as well as for planetary atmosphere models. But this can be challenging because of the planet-to-star...
View ArticleTransient effects in Herschel/PACS spectroscopy
The Ge:Ga detectors used in the PACS spectrograph onboard the Herschel space telescope react to changes of the incident flux with a certain delay. This generates transient effects on the resulting...
View ArticleMultiscale statistical analysis of coronal solar activity
Multi-filter images from the solar corona are used to obtain temperature maps which are analyzed using techniques based on proper orthogonal decomposition (POD) in order to extract dynamical and...
View ArticleAges of LMC Star Clusters using ASAD$_2$
We use ASAD$_2$, the new version of ASAD (Analyzer of Spectra for Age Determination), to obtain the age and reddening of 27 LMC clusters from full fitting of integrated spectra using different...
View ArticleLight propagation in the gravitational field of N arbitrarily moving bodies...
The light-trajectory in the gravitational field of N extended bodies in arbitrary motion is determined in the first post-Newtonian approximation. According to the theory of reference systems, the...
View ArticleImproving the Data Quality of Advanced LIGO Based on Early Engineering Run...
The Advanced Laser Interferometer Gravitational-wave Observatory (LIGO) detectors have completed their initial upgrade phase and will enter the first observing run in late 2015, with detector...
View ArticleRevised Wavelength and Spectral Response Calibrations for AKARI Near-Infrared...
We perform revised spectral calibrations for the AKARI near-infrared grism to quantitatively correct for the effect of the wavelength-dependent refractive index. The near-infrared grism covering the...
View ArticleMapping the Gas Turbulence in the Coma Cluster: Predictions for Astro-H...
Astro-H will be able for the first time to map gas velocities and detect turbulence in galaxy clusters. One of the best targets for turbulence studies is the Coma cluster, due to its proximity, absence...
View ArticleMillimeter-Wave Broadband Anti-Reflection Coatings Using Laser Ablation of...
We report on the first use of laser ablation to make sub-millimeter, broad-band, anti-reflection coatings (ARC) based on sub-wavelength structures (SWS) on alumina and sapphire. We used a 515 nm laser...
View ArticleA Statistical Framework for Utilization of Simultaneous Pupil Plane and Focal...
A new generation of telescopes with mirror diameters of 20 m or more, called extremely large telescopes (ELTs) has the potential to provide unprecedented imaging and spectroscopy of exo-planetary...
View ArticleAstronomical Observing Conditions at Xinglong Observatory from 2007 to 2014
Xinglong Observatory of the National Astronomical Observatories, Chinese Academy of Sciences (NAOC), is one of the major optical observatories in China, which hosts nine optical telescopes including...
View ArticleAn Apodized Kepler Periodogram for Separating Planetary and Stellar Activity...
A new apodized Keplerian (AK) model is proposed for the analysis of precision radial velocity (RV) data to model both planetary and stellar activity (SA) induced RV signals. A symmetrical Gaussian...
View ArticleVUV spectroscopy of carbon dust analogs: contribution to interstellar extinction
A full spectral characterization of carbonaceous dust analogs is necessary to understand their potential as carriers of observed astronomical spectral signatures such as the ubiquitous UV bump at 217.5...
View ArticleTemperature calibration of the E and B experiment
The E and B Experiment (EBEX) is a balloon-borne polarimeter designed to measure the polarization of the cosmic microwave background radiation and to characterize the polarization of galactic dust....
View ArticleMillimeter-Wave Broadband Anti-Reflection Coatings Using Laser Ablation of...
We report on the first use of laser ablation to make sub-millimeter, broad-band, anti-reflection coatings (ARC) based on sub-wavelength structures (SWS) on alumina and sapphire. We used a 515 nm laser...
View ArticleTransient effects in Herschel/PACS spectroscopy [Replacement]
The Ge:Ga detectors used in the PACS spectrograph onboard the Herschel space telescope react to changes of the incident flux with a certain delay. This generates transient effects on the resulting...
View ArticleAll-sky coherent search for continuous gravitational waves in 6-7 Hz band...
A torsion-bar antenna (TOBA) is a low-frequency terrestrial gravitational wave (GW) antenna which consists of two orthogonal bar-shaped test masses. We upgraded the prototype TOBA and achieved the...
View ArticleAn information-theoretic approach to the gravitational-wave burst detection...
The advanced era of gravitational-wave astronomy, with data collected in part by the LIGO gravitational-wave interferometers, has begun as of fall 2015. One potential type of detectable gravitational...
View ArticleTransition radiation at radio frequencies from ultra-high energy...
Coherent radiation at radio frequencies from high-energy showers fully contained in a dense radio-transparent medium - like ice, salt or regolith - has been extensively investigated as a promising...
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