Proposed 60-cm multichannel Solar Vacuum Telescope of UPSO, Nainital

Abstract

The proposed Solar Vacuum Telescope (SVT) having equatorial mount will be equipped with 60 cm (f/15) vacuum Gregorian tube, 35-cm vacuum reflector tube and two 15-cm refractor telescopes. The SVT will consist of:

(1)60-cm (focal length 900-cm) Gregorian vacuum tube with four channels to install four filters (6563 Å, 3933 Å, continuum 5500 Å, and tunable filter range 4200 – 6000 Å. (2)35-cm (focal length 900-cm) reflector vacuum tube with two Lyot filters wavelengths 5324Å, pass bands (PB) 0.15Å, and 4861Å, PB 0.12Å, and KD*P crystals for simultaneous measurements of solar magnetic fields of solar active regions at two heights. (3)Two 15-cm refractor telescopes will have following facilities: (A) – Full disk imaging (image size: 10mm) in Solar Hα, (B) – Full disk imaging (image size: 10mm) in white light, (C) – Full disk for solar guider, and (D) – Full disk imaging (image size: 28mm) in 10830Å. The second 15-cm (focal length 225-cm) refractor will be equipped with Hα (passband: 3Å) filter for prominence monitoring.