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On the performance of a dual-beam polarimeter at Kodaikanal Tower Telescope

Singh, Jagdev; Sankarasubramanian, K.; Ramesh, K. B. +4 more

Calibration and characterization of a dual-beam polarimeter installed at Kodaikanal Tower Telescope (KTT) for spectropolarimetric observations are presented in this paper. It was found that a slit width of 48 µ is optimum for the spectrograph setup at KTT and corresponding spectral resolution is 32.47 mÅ. It was demonstrated that the precisi…