Indian Astronomical Observatory, Hanle

Hanle Faint Object Spectrograph Camera is an optical imager cum spectrograph built collaboratively at the Copenhagen University Observatory.

The instrument is a focal reducer type of instrument allowing for a larger field coverage for a given detector, and also low and medium resolution grism spectroscopy. It is possible to shift between the imaging and spectroscopic modes of operation in seconds.

• Specifications:click here for full details

Wavelength range	350-900 nm
Detector	2048 X 4096 pixels CCD with pixel size 15 X 15 microns
Collimator focal length	252 mm
Camera focal length	147 mm
Reduction factor	0.58
Spectral resolutions	R~150 to R~4500 using a set of 11 grisms
FOV	10 X 10 arcmin; (unvignetted)
Filters	Bessell UBVRI 372.7(10), 486.1(10), 500.7(10), 656.3(10), 656.3(50), 672.4(10)
Performance (not necessarily limiting)	Imaging: R=22.2, err=0.18 mag, exp time=1200s 2-sigma detection of ~23.0 mag/arcsec^2 in 40 minutes (H-alpha filter) Spectroscopy: V=18.5, Resln =300; S/N=22 for 20min exp time