Spectral Characterization of Solar Active Region NOAA 8242 in Quiet and Sunspot Locations
Abstract
We present results from the analysis of simultaneous Stokes I profile measurements in Fe I twin line in 6302 Å region and Ca II K 3934 Å line over NOAA 8242 on 13th June 1998. Advanced Stokes Polarimeter (ASP) instrument of the Vacuum Tower Telescope (VTT) of Sac Peak, NSO, U.S.A was used for obtaining these observations. Along with the spectral data simultaneous filtergrams in G-band, Hα 6562.8 Å, and 6118.7 Å continuum were also obtained using the UBF filter. The slope corrected spectral data was used to construct spectroheliograms, and the maps of spectral asymmetry, velocity, FWHM, Equivalent width by a Gaussian fitting of spectral line profiles for both the quiet and sunspot regions. The implications for strong and weak magnetic field locations have been discussed.
- Publication:
-
Bulletin of the Astronomical Society of India
- Pub Date:
- September 2005
- Bibcode:
- 2005BASI...33..360J