Preparation of a dual wavelength sequence of high-resolution solar photospheric images using phase diversity

被引:58
作者
Lofdahl, MG
Berger, TE
Shine, RS
Title, AM
机构
[1] Lockheed Martin Missiles & Space Adv Technol Ctr, Palo Alto, CA 94304 USA
[2] Stockholm Observ, Royal Swedish Acad Sci, S-13336 Saltsjobaden, Sweden
关键词
Sun; granulation; photosphere; techniques; image processing; interferomatic;
D O I
10.1086/305308
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The collection, seeing compensation, and temporal filtering of a high-resolution time-sequence of solar photospheric images is described. A 70 minute time series of cospatial and cotemporal G band 4305 Angstrom and wideband 4686 Angstrom filtergrams was obtained with the 50 cm Swedish Vacuum Solar Telescope on the island of La Palma, Spain. The 29 " x 70 " field-of-view near disk center contains both an enhanced network region and an (apparently) nonmagnetic "quiet" region of granulation. The mean time between frames is 23.5 s. Each frame is created with partitioned phase-diverse speckle restoration of three realizations of the atmospheric turbulence acquired rapidly in sequence. The result is high-resolution movies of the solar photosphere, good enough to allow detection, tracking, and analysis of similar to 0." 2 bright points. This analysis is the subject of a companion paper.
引用
收藏
页码:965 / +
页数:11
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