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19932026
Showing 2018 · astro-ph.IMShow all

23 papers · 2 filters

astro-ph.IM2018★ 329 cited

The enhanced X-ray Timing and Polarimetry mission - eXTP

ShuangNan Zhang, Andrea Santangelo, Marco Feroci +146

In this paper we present the enhanced X-ray Timing and Polarimetry mission - eXTP. eXTP is a space science mission designed to study fundamental physics under extreme conditions of…

astro-ph.IM2018★ 356 cited

The Fifteenth Data Release of the Sloan Digital Sky Surveys: First Release of MaNGA Derived Quantities, Data Visualization Tools and Stellar Library

D. S. Aguado, Romina Ahumada, Andres Almeida +230

Twenty years have passed since first light for the Sloan Digital Sky Survey (SDSS). Here, we release data taken by the fourth phase of SDSS (SDSS-IV) across its first three years o…

astro-ph.IM2018★ 13 cited

O2 signature in thin and thick O2-H2O ices

B. Müller, B. M. Giuliano, L. Bizzocchi +2

Aims. In this paper we investigate the detectability of the molecular oxygen in icy dust grain mantles towards astronomical objects. Methods. We present a systematic set of experim…

astro-ph.IM2018★ 3 cited

Absolute reflectance of a concave mirror used for astro-particle physics experiments

Razmik Mirzoyan, Cornelia Arcaro, Hanna Kellermann +1

The absolute reflectance of a reflector and its point spread function are the key parameters of a telescope for measuring light flux. Typically, one is using low-cost technologies…

astro-ph.IM2018★ 2 cited

Radio Galaxy Detection in the Visibility Domain

Adam Malyali, Marzia Rivi, Filipe B. Abdalla +1

We explore a new Bayesian method of detecting galaxies from radio interferometric data of the faint sky. Working in the Fourier domain, we fit a single, parameterised galaxy model…

astro-ph.IM2018★ 20 cited

Magnetic shielding of soft protons in future X-ray telescopes: the case of the ATHENA Wide Field Imager

Valentina Fioretti, Andrea Bulgarelli, Silvano Molendi +10

Both the interplanetary space and the Earth magnetosphere are populated by low energy ( keV) protons that are potentially able to scatter on the reflecting surface of Wolt…

astro-ph.IM2018

The MICADO first light imager for ELT: its astrometric performance

J. -U. Pott, G. Rodeghiero, H. Riechert +4

We report on our ongoing efforts to ensure that the MICADO NIR imager reaches differential absolute (often abbreviated: relative) astrometric performance limited by the SNR of typi…

astro-ph.IM2018★ 5 cited

ERIS: revitalising an adaptive optics instrument for the VLT

Richard Davies, Simone Esposito, Hans Martin Schmid +63

ERIS is an instrument that will both extend and enhance the fundamental diffraction limited imaging and spectroscopy capability for the VLT. It will replace two instruments that ar…

astro-ph.IM2018★ 40 cited

XZ: Deriving redshifts from X-ray spectra of obscured AGN

Charlotte Simmonds, Johannes Buchner, Mara Salvato +2

Context: Redshifts are fundamental for our understanding of extragalactic X-ray sources. Ambiguous counterpart associations, expensive optical spectroscopy and/or multimission mult…

astro-ph.IM2018

SAGE: using CubeSats for Gravitational Wave Detection

S. Lacour, M. Nowak, P. Bourget +7

SAGE (SagnAc interferometer for Gravitational wavE) is a fast track project for a space observatory based on multiple 12-U CubeSats in geostationary orbit. The objective of this pr…

astro-ph.IM2018

The GRAVITY fringe tracker: correlation between optical path residuals and atmospheric parameters

S. Lacour, R. Dembet, R. Abuter +8

After the first year of observations with the GRAVITY fringe tracker, we compute correlations between the optical path residuals and atmospheric and astronomical parameters. The me…

astro-ph.IM2018★ 25 cited

ARGOS at the LBT. Binocular laser guided ground layer adaptive optics

S. Rabien, R. Angel, L. Barl +48

Having completed its commissioning phase, the Advanced Rayleigh guided Ground-layer adaptive Optics System (ARGOS) facility is coming online for scientific observations at the Larg…

astro-ph.IM2018★ 38 cited

Star-galaxy classification in the Dark Energy Survey Y1 dataset

I. Sevilla-Noarbe, B. Hoyle, M. J. Marchã +75

We perform a comparison of different approaches to star-galaxy classification using the broad-band photometric data from Year 1 of the Dark Energy Survey. This is done by performin…

astro-ph.IM2018★ 211 cited

Gaia Data Release 2: Properties and validation of the radial velocities

D. Katz, P. Sartoretti, M. Cropper +51

For Gaia DR2 (GDR2), 280 million spectra, collected by the RVS instrument on-board Gaia, were processed and median radial velocities were derived for 9.8 million sources brighter t…

astro-ph.IM2018★ 7 cited

Design study and first performance simulation of the ELT/MICADO focal plane coronagraphs

Clément Perrot, Pierre Baudoz, Anthony Boccaletti +5

In this paper, we present the design and the expected performance of the classical Lyot coronagraph for the high contrast imaging modes of the wide-field imager MICADO. MICADO is a…

astro-ph.IM2018★ 1.9k cited

Overview of the DESI Legacy Imaging Surveys

Arjun Dey, David J. Schlegel, Dustin Lang +157

The DESI Legacy Imaging Surveys are a combination of three public projects (the Dark Energy Camera Legacy Survey, the Beijing-Arizona Sky Survey, and the Mayall z-band Legacy Surve…

astro-ph.IM2018★ 74 cited

Optimizing spectroscopic follow-up strategies for supernova photometric classification with active learning

E. E. O. Ishida, R. Beck, S. Gonzalez-Gaitan +10

We report a framework for spectroscopic follow-up design for optimizing supernova photometric classification. The strategy accounts for the unavoidable mismatch between spectroscop…

astro-ph.IM2018★ 124 cited

SPICA - a large cryogenic infrared space telescope Unveiling the obscured Universe

P. R. Roelfsema, H. Shibai, L. Armus +66

Measurements in the infrared wavelength domain allow us to assess directly the physical state and energy balance of cool matter in space, thus enabling the detailed study of the va…

astro-ph.IM2018★ 5 cited

Optical Distortion in the NACO Imager

P. M. Plewa, S. Gillessen, M. Bauböck +11

In this research note, we present a set of distortion solutions that may be used to correct geometric optical distortion in images taken with the S13 camera of the NACO adaptive op…

astro-ph.IM2018★ 14 cited

Random Forest Classification of Stars in the Galactic Centre

P. M. Plewa

Near-infrared high-angular resolution imaging observations of the Milky Way's nuclear star cluster have revealed all luminous members of the existing stellar population within the…

astro-ph.IM2018★ 12 cited

Methods for multiple telescope beam imaging and guiding in the near infrared

N. Anugu, A. Amorim, P. Gordo +10

Atmospheric turbulence and precise measurement of the astrometric baseline vector between any two telescopes are two major challenges in implementing phase referenced interferometr…

astro-ph.IM2018★ 231 cited

The Dark Energy Survey Image Processing Pipeline

E. Morganson, R. A. Gruendl, F. Menanteau +40

The Dark Energy Survey (DES) is a five-year optical imaging campaign with the goal of understanding the origin of cosmic acceleration. DES performs a 5000 square degree survey of t…

astro-ph.IM2018★ 497 cited

The Dark Energy Survey Data Release 1

T. M. C. Abbott, F. B. Abdalla, S. Allam +199

We describe the first public data release of the Dark Energy Survey, DES DR1, consisting of reduced single epoch images, coadded images, coadded source catalogs, and associated pro…