Calibration constraints for high contrast imaging


M. Langlois, A. Vigan, K Dohlen et al.




The detection and characterization of extrasolar planets by direct imaging is becoming more and more promising with the preparation of dedicated high-contrast instruments and the help of new data analysis techniques. This paper describes the instrument performances and the impact of instrumental calibrations on finding and characterizing extrasolar planets, and on observing strategies for IRDIS, one of the SPHERE subsystems,. We discuss the main instrumental calibration challenges to be addressed to reach very high contrast imaging with future instruments such as SPHERE and in the future for ELT instruments, where added instrumental complexity will increase the calibration time and accuracy.