| Presenter: | Kevin Reardon |
| Affiliation: | INAF/Oss. Astrofisico di Arcetri |
| Title: | Advances in bidimensional spectropolarimetry with IBIS |
| Authors: | K. Reardon, A. Tritschler, H. Uitenbroek, F. Cavallini, R. Casini, H. Socas-Navarro, D. Del Moro, L. Kleint, G. Cauzzi, S. Giordano |
| Form: | talk |
| Abstract: | An accurate characterization of the magnetic field vector is crucial to advance our understanding of the physical processes that occur in the magnetized atmosphere. In this context two-dimensional full Stokes spectropolarimetry based on narrowband and fast tunable filters offers several unique advantages with respect to grating spectropolarimeters. We use the Interferometic Bidimensional Spectrometer (IBIS) routinely operated at the Dunn Solar Telescope in conjunction with the high-order adaptive optics system to explore some of these issues. IBIS has recently been upgraded to a vector polarimeter with unparalleled capabilities most notably in several chromospheric spectral lines. We present recent improvements in the spectropolarimetric performance of the instrument, including near-diffraction-limited observations of the full Stokes signal, calibration for instrumental polarization, and the application of image reconstruction techniques. To demonstrate the utility of this approach, we present the different scientific topics that have recently been addressed with IBIS. These include observations of the chromospheric Stokes profiles, quiet Sun magnetic fields, calibration of space instrumentation, and Hanle effect observations. |
| Session: | 6. Coronal radio and infrared polarimetry |
| Presentation date: | Thursday 20th September |
| Presentation time: | 09:15:00 |