Hanle echelle spectrograph

Hanle echelle spectrograph is a fibre-fed, high resolution (R = 30,000 and 60,000), spectrograph for the 2m HCT telescope. It was developed in collaboration with IRL (Industrial Research Lab, Kiwi Star), New Zealand. The project was funded by Department of Science and Technology (DST), India.

The spectrograph design is a bench mark for compact size, large wavelength coverage and high throughput, based on a white pupil concept. A complete wavelength coverage over 350 - 1000nm, will allow measurement of chemical abundances of key elements of stellar evolution.

The high mechanical stability and double fibre mode will allow measurement of precise radial velocities, essential for programs such as exoplanet studies and astroseismology.

Spectral coverage : 350-1000nm
Resolution : 30000 (without image slicer)
: 60000 (with image slicer)
Radial velocity accuracy: 20m/s with double fibre mode
Stability: 100m/s
effiency : > 20% (450-800nm)
Observing modes : Object/ThAr, Object/Sky, ThAr/ThAr
Faint limit : 11mag at median seeing (1.5arcsec)
Last updated on: November 20, 2020