Nonlinear least-squares analysis of Stokes profiles

被引：0
|
作者：
Ceja, JA [1 ]
Walton, SR [1 ]
机构：
[1] Calif State Univ Northridge, San Fernando Observ, Northridge, CA 91330 USA
来源：
SOLAR PHYSICS | 2005年 / 226卷 / 01期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1007/s11207-005-6469-1
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We describe improvements to the calibration and analysis of Fe I 6302.5 angstrom data from the San Fernando Observatory Video Spectra-Spectroheliograph (SFO-VSSHG). A more effective flat field is generated and the scales of the simultaneous Stokes measurements are made equal. Analysis of Stokes profiles is carried out using a moments technique but applied to nonlinear least-squares fits to the data. Typical spectropolarimetric results from the old and new methods are compared and discussed. Finally, we present asymmetry maps, a zero-crossing map, and a "relative-split" map extracted from the fits to the Stokes V profiles.
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页码：17 / 36
页数：20
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