Optimal a posteriori fringe tracking in optical interferometry - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2014

Optimal a posteriori fringe tracking in optical interferometry

Résumé

The so-called “phase delay tracking” attempts to estimate the effects of the turbulence on the phase of the interferograms in order to numerically cophase the measured complex visibilities and to coherently integrate them. This is implemented by the “coherent fringe analysis” of MIDI instrument 1 but has only been used for high SNR data. In this paper, we investigate whether the sensitivity of this technique can be pushed to its theoretical limits and thus applied to fainter sources. In the general framework of the maximum likelihood and exploiting the chromatic behavior of the turbulence effects, we propose a global optimization strategy to compute various estimators of the differential pistons between two data frames. The most efficient estimators appear to be the ones based on the phasors, even though they do not yet reach the theoretical limits.
Fichier principal
Vignette du fichier
40-Soulez.F.2014.SPIE.9146.91462Y.pdf (771.45 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-01184508 , version 1 (13-11-2017)

Identifiants

Citer

Ferréol, Soulez, Éric Thiébaut, Michel, Tallon, Isabelle, Tallon-Bosc, Paulo Garcia. Optimal a posteriori fringe tracking in optical interferometry. SPIE Optical and Infrared Interferometry IV,, SPIE, 2014, Montreal, Canada. pp.91462Y, ⟨10.1117/12.2056590⟩. ⟨hal-01184508⟩
80 Consultations
99 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More