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10 papers
ESO's new generation of Exposure Time Calculators
Henri M. J. Boffin, Jakob Vinther, Gurvan Bazin +4
Users of astronomical observatories rely on Exposure Time Calculators (ETC) to prepare their proposals and then their observations. The ETC is therefore a crucial element in an obs…
CRIRES on sky at the ESO Very Large Telescope
R. J. Dorn, P. Bristow, J. V. Smoker +49
The CRyogenic InfraRed Echelle Spectrograph (CRIRES) Upgrade project CRIRES extended the capabilities of CRIRES. It transformed this VLT instrument into a cross-dispersed spe…
Mid-infrared circumstellar emission of the long-period Cepheid l Carinae resolved with VLTI/MATISSE
V. Hocdé, N. Nardetto, A. Matter +149
The nature of circumstellar envelopes (CSE) around Cepheids is still a matter of debate. The physical origin of their infrared (IR) excess could be either a shell of ionized gas, o…
ESO's Exposure Time Calculator 2.0
Henri M. J. Boffin, Jakob Vinther, Lars K. Lundin +1
Users of the La Silla Paranal Observatory have to rely on the ESO Exposure Time Calculator (ETC) to prepare their observations. A project has been started at ESO to modernise the E…
The asymmetric inner disk of the Herbig Ae star HD 163296 in the eyes of VLTI/MATISSE: evidence for a vortex?
J. Varga, M. Hogerheijde, R. van Boekel +133
Context. The inner few au region of planet-forming disks is a complex environment. High angular resolution observations have a key role in understanding the disk structure and the…
Molecfit: A general tool for telluric absorption correction. I. Method and application to ESO instruments
A. Smette, H. Sana, S. Noll +10
Context: The interaction of the light from astronomical objects with the constituents of the Earth's atmosphere leads to the formation of telluric absorption lines in ground-based…
Flux calibration of medium-resolution spectra from 300 nm to 2500 nm: Model reference spectra and telluric correction
S. Moehler, A. Modigliani, W. Freudling +8
While the near-infrared wavelength regime is becoming more and more important for astrophysics there is a marked lack of spectrophotometric standard star data that would allow the…
Molecfit: A Package for Telluric Absorption Correction
W. Kausch, S. Noll, A. Smette +7
Correcting for the sky signature usually requires supplementary calibration data which are very expensive in terms of telescope time. In addition, the scheduling flexibility is res…
An atmospheric radiation model for Cerro Paranal. I. The optical spectral range
S. Noll, W. Kausch, M. Barden +4
The Earth's atmosphere affects ground-based astronomical observations. Scattering, absorption, and radiation processes deteriorate the signal-to-noise ratio of the data received. F…
X-shooter, the new wide band intermediate resolution spectrograph at the ESO Very Large Telescope
Joel Vernet, H. Dekker, S. D'Odorico +87
X-shooter is the first 2nd generation instrument of the ESO Very Large Telescope(VLT). It is a very efficient, single-target, intermediate-resolution spectrograph that was installe…