Research facilities for solar astronomy at ARIES |
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| Authors: | P Pant |
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| Institution: | (1) Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, 263 129 Nainital, India |
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| Abstract: | The solar observational facilities at ARIES (erstwhile U.P. State Observatory, UPSO), Nainital, began in the sixties with
the acquisition of two moderate sized (25 cm, f/66 off-axis Skew Cassegrain and 15 cm, f/15 refractor) telescopes. Both these
systems receive sunlight through a 45 cm and 25 cm coelostat respectively. The backend instruments to these systems comprised
of a single pass grating spectrograph for spectroscopic study of the Sun and a Bernhard-HalleHα filter, coupled with a Robot recorder camera for solar patrolling inHα respectively. With the advancement in solar observing techniques with high temporal and spatial resolution inHα and other wavelengths, it became inevitable to acquire sophisticated instrumentation for data acquisition. In view of that,
the above facilities were upgraded, owing to which the conventional photographic techniques were replaced by the CCD camera
systems attached with two 15 cm, f/15 Coude refractor telescopes. These CCD systems include the Peltier cooled CCD camera
and photometrics PXL high speed modular CCD camera which provide high temporal and spatial resolution of ∼ 25 ms and ∼ 1.3
arcsec respectively. |
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| Keywords: | Sun: telescope coelostat solar activity-CCD— V++ |
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