New Vectormagnetographs at the Big Bear Solar Observatory

Details New Vectormagnetographs at the Big Bear Solar Observatory New Vectormagnetographs at the Big Bear Solar Observatory

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...194.7607s&link_type=abstract

American Astronomical Society, 194th AAS Meeting, #76.07; Bulletin of the American Astronomical Society, Vol. 31, p.957

Physics

Optics

Scientific paper

During the past two years, the Big Bear Solar Observatory has begun an aggressive program to upgrade the observatory's instrumentation. In the forefront of this effort are improvements to the current vectormagnetograph and the development of two new vectormagnetographs systems - one in visible light and one in near infra red. In the first case, the current filter-based video-magnetograph, on the 10" vacuum-refractor, is being replaced by a 1k by 1k, 12-bit, 15 frames pre second CCD camera, and higher quality polarization optics to improve our measurments using the CaI line at 6103 Angstroms. Secondly, a Fabry-Perot based imaging magnetograph with a spacial resolution of 0.15 arc-sec per pixel having a temporal resolution of approximately 1 min. for the Stokes-V and approximately 4 min. for the full Stokes vector with a band-pass of 80m Angstroms is being developed for the 26" vacuum-reflector to scan the FeI line at 6302.5 Angstroms. In the near infra red, an automated spectrograph based vectormagnetograph, using a 12-bit, 320 by 240, 30 frames per second InGaAs CCD camera, is being developed to study the FeI lines at 1.56485 microns and 1.56529 microns. Current plans and the status of each instrument will be discussed and test results will be presented.

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