Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011a%26a...529a..78k&link_type=abstract
Astronomy & Astrophysics, Volume 529, id.A78
Astronomy and Astrophysics
Astrophysics
Instrumentation: Interferometers, Instrumentation: Polarimeters, Instrumentation: Spectrographs, Polarization, Sun: General
Scientific paper
Context. Narrow-band spectropolarimetry is used to obtain information about the velocity and magnetic field structure of the solar atmosphere. Several types of instruments are suited to these observations, each with different advantages and drawbacks. Aims: We set up a novel instrument combination using two LiNbO3 Fabry Pérot interferometers (FPI), a high-resolution grating spectrograph, and the ZIMPOL system for polarimetry at IRSOL. With this system, we can carry out imaging spectropolarimetry of any spectral line from 390 to 660 nm, with a spectral resolution of 30 mÅ at 630 nm. Methods: We describe the setup, its properties, and calculate the limitations induced by the FPI and the spectrograph. We carry out spectropolarimetric observations of the sunspot AR 11087 in different spectral lines with suitable Landé factors that could be used to derive the magnetic field strength in different height ranges of the solar atmosphere. Results: The main advantage of our instrument compared to similar systems is that no special prefilters are required for each spectral line. A slight disadvantage is the spatial smearing induced by the dispersion of the finite transmission profiles of the FPI, which however is of the same magnitude as the seeing-limited resolution of 1-2″ at IRSOL. Conclusions: We demonstrate that this particular instrument combination is well suited to spectropolarimetry at IRSOL.
Feller Alex
Gisler Daniel
Kleint Lucia
No associations
LandOfFree
Imaging spectropolarimetry with two LiNbO3 Fabry Pérot interferometers and a spectrograph 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 Imaging spectropolarimetry with two LiNbO3 Fabry Pérot interferometers and a spectrograph, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Imaging spectropolarimetry with two LiNbO3 Fabry Pérot interferometers and a spectrograph will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1735717