A&A 421, 729-734 (2004)
A model to interpret the intensity-velocity and velocity-velocity phase differences from solar observations obtained with magneto-optical filtersP. F. Moretti and G. Severino
INAF, Osservatorio Astronomico di Capodimonte, via Moiarello 16, 80131 Napoli, Italy
(Received 29 July 2003 / Accepted 16 February 2004 )
The intensity ( I) and velocity ( V) signals obtained using magneto-optical filters (MOF), are not independent of each other. The induced spurious signals affect the intensity-velocity phase difference measurements and the effect is referred to as a I-V crosstalk (Moretti & Severino 2002). We show a new model to interpret the I-V phase measurements and, in particular, its application to the interpretation of the data obtained with sodium MOF systems. The model can also be applied to correct the velocity-velocity phase from multi layer observations.
Key words: Sun: oscillations -- instrumentation: miscellaneous
Offprint request: P. F. Moretti, email@example.com
© ESO 2004