31 citations · 64 across the 7 of their papers we have counts for
4 papers
A distinct magnetic property of the inner penumbral boundary III. Analysis of simulated sunspots
Jan Jurcak, Markus Schmassmann, Matthias Rempel +2
The analyses of sunspot observations revealed a fundamental magnetic property of the umbral boundary, the invariance of the vertical component of the magnetic field. We aim to anal…
A distinct magnetic property of the inner penumbral boundary. II. Formation of a penumbra at the expense of a pore
Jan Jurcak, Nazaret Bello Gonzalez, Rolf Schlichenmaier +1
We recently presented evidence that stable umbra-penumbra boundaries are characterised by a distinct canonical value of the vertical component of the magnetic field, $B^{\rm stable…
Comparing simultaneous measurements by two high-resolution imaging spectropolarimeters: the `Goettingen' FPI@VTT and CRISP@SST
N. Bello González, L. Bellot Rubio, A. Ortiz +3
In July 2009, the leading spot of the active region NOAA11024 was observed simultaneously and independently with the 'Goettingen' FPI at VTT and CRISP at SST, i.e., at two differen…
The GREGOR solar telescope on Tenerife
Wolfgang Schmidt, Oskar von der Lühe, Reiner Volkmer +14
2011 was a successful year for the GREGOR project. The telescope was finally completed in May with the installation of the 1.5-meter primary mirror. The installation of the first-l…