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15 papers · 2 filters
Using raytracing to derive the expected performance of STELLA's SES-VIS spectrograph
Michael Weber, Klaus Strassmeier, Manfred Woche +2
The visual STELLA echelle spectrograph (SES-VIS) is a new instrument for the STELLA-II telescope at the Izaña observatory on Tenerife. Together with the original SES spectrograph -…
Second generation spectroscopic instrumentation for the STELLA robotic observatory
Michael Weber, Manfred Woche, Klaus G. Strassmeier +2
The current STELLA Echelle spectrograph (SES), which records 390nm to 870nm in one shot at a spectral resolution of 55000, will be replaced by a suite of specialized spectrographs…
Correcting Sky Quality Meter measurements for aging effects using twilight as calibrator
Johannes Puschnig, Magnus Näslund, Axel Schwope +1
In the last decade numerous Sky Quality Meters (SQMs) were installed throughout the globe, aiming to assess the temporal change of the night sky brightness (NSB), and thus the chan…
Gaia Early Data Release 3: The astrometric solution
L. Lindegren, S. A. Klioner, J. Hernández +94
Gaia Early Data Release 3 (Gaia EDR3) contains results for 1.812 billion sources in the magnitude range G = 3 to 21 based on observations collected by the European Space Agency Gai…
Performance limits of astronomical arrayed waveguide gratings on silica platform
Andreas Stoll, Kalaga Madhav, Martin Roth
We present a numerical and experimental study of the impact of phase errors on the performance of large, high-resolution Arrayed Waveguide Gratings (AWG) for applications in astron…
Starlight coupling through atmospheric turbulence into few-mode fibers and photonic lanterns in the presence of partial adaptive optics correction
Momen Diab, Aline N. Dinkelaker, John Davenport +2
Starlight corrupted by atmospheric turbulence cannot couple efficiently into astronomical instruments based on integrated optics as they require light of high spatial coherence to…