Indian Astronomical Observatory, Hanle


2 M TELESCOPE - HANLE FAINT OBJECT SPECTROGRAPH CAMERA

Hanle Faint Object Spectrograph CameraHanle 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.

 

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

Last updated on: September 23, 2019