IR Vector Magnetic Fields I: Instrumental Polarization Correction

Details IR Vector Magnetic Fields I: Instrumental Polarization Correction IR Vector Magnetic Fields I: Instrumental Polarization Correction

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.3706j&link_type=abstract

American Astronomical Society Meeting 204, #37.06; Bulletin of the American Astronomical Society, Vol. 36, p.709

Astronomy and Astrophysics

Astronomy

Scientific paper

Instrumental polarization is evident in the spectra of active region 10008 taken with the CSUN-NSO IR camera at the McMath-Pierce telescope on June 24, 2002. Several iron lines near 15650 Å in the spectra exhibit Zeeman splitting. Using a technique described by Kuhn et. al. (1994) the original polarization is restored. For all Zeeman split lines in the spectra the corrected Stokes profiles for the Q and U components show symmetry, while Stokes V is made antisymmetric with no central component.
The observed Stokes vector is related to the true Stokes vector through the formula Strue = M-1 Sobs where M-1 is the inverse Mueller matrix. The correction coefficients from the Kuhn method are used to compute the inverse Mueller matrix for light path of the entire system. The expected inverse Mueller matrix is computed for the telescope at each scan time using a simple model described by Bernasconi (1997) but assuming the n and k values of the index of refraction are the same for each mirror surface. A least squares technique is used to fit this telescope model to the measured inverse Mueller matrix for the system. The telescope model can account for most of the measured cross-talk except for the observed Stokes Q to Stokes V cross-talk which is thought to occur in the polarimeter.

Affiliated with

Also associated with

No associations

Rating

IR Vector Magnetic Fields I: Instrumental Polarization Correction does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with IR Vector Magnetic Fields I: Instrumental Polarization Correction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and IR Vector Magnetic Fields I: Instrumental Polarization Correction will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1171811