Lucky spectroscopy, an equivalent technique to lucky imaging
نویسندگان
چکیده
منابع مشابه
An investigation of lucky imaging techniques
We present an empirical analysis of the effectiveness of frame selection (also known as Lucky Imaging) techniques for high resolution imaging. A high-speed image recording system has been used to observe a number of bright stars. The observations were made over a wide range of values of D/r0 and exposure time. The improvement in Strehl ratio of the stellar images due to aligning frames and sele...
متن کاملLucky Factors
We propose a new method to select amongst a large group of candidate factors — many of which might arise as a result of data mining — that purport to explain the cross-section of expected returns. The method is robust to general distributional characteristics of both factor and asset returns. We allow for the possibility of time-series as well as cross-sectional dependence. The technique accomm...
متن کاملAstraLux: the Calar Alto Lucky Imaging Camera
AstraLux is the Lucky Imaging camera for the Calar Alto 2.2-m telescope, based on an electron-multiplying high speed CCD. By selecting only the best 1-10% of several thousand short exposure frames, AstraLux provides nearly diffraction limited imaging capabilities in the SDSS i’ and z’ filters over a field of view of 24×24 arcseconds. By choosing commercially available components wherever possib...
متن کاملAn Efficient Lucky Imaging System for Astronomical Image Restoration
The resolution of astronomical imaging from large optical telescopes is usually limited by the blurring effects of refractive index fluctuations in the Earth’s atmosphere. In this paper, we develop a lucky imaging system to restore astronomical images through atmosphere turbulence on 1.23m telescope. Our system takes very short exposures, on the order of the atmospheric coherence time. The rapi...
متن کاملA Lucky Wound
an absolute bull's-eye through the face and out at the back of the neck, and was inflicted by a rifle bullet. He was not rendered unconscious, and was seen only shortly after, by the regimental doctor, Lieutenant Baker, i.m.s. He was transferred the same day to the ambulance, where a detailed examination was made, which has led to the report. There was a small entrance wound just beneath the br...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2021
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/202039479