Stokes spectra2014.2.23

Tetsu Anan

Before DST calibration20140223scan012_iquv_d.gif

After DST calibration20140223scan012_iquv_d_co.gif

DST calibration

XN = −0.0187、 τN = −10.3°、 XC = 0.0154、τC = −6.78°、 Sc = 0

XN = −0.0200、 τN = −10.3°、 XC = 0.0200、τC = −5.00°、 Sc = 0

Calibration on 2013.5.5 Calibration by using polarization in continuum

Better

After DST “re”calibration20140223scan012_iquv_d_cn.gif

After DST “re”calibrationHigh contrast（ ±0.5%）

20140223scan012_iquv_d_cn_2.gif

Continuum offsetHigh contrast（ ±0.5%）

refer to polarization in continuum between white lines

20140223scan012_iquv_d_cn_con.gif

Remove fringe, Casini’s methodHigh contrast（ ±0.5%）

20140223scan012_iquv_d_cn_con_casini1.gif

Remove fringe, Casini’s methodHigh contrast（ ±0.1%）

20140223scan012_iquv_d_cn_con_casini1_1.gif

Remove fringe, Casini’s method、 SiHigh contrast（ ±0.5%）

20140223scan012_iquv_d_cn_con_casini1si.gif

Summary

• Save data– He : 20140526_7.sav– Si : 20140527_1.sav

Sign of V

• NOAA11982、黒点は波長短い方が負