Aryabhatta Research Institute
of observational Sciences
3.6m Devasthal Optical Telescope (DOT)
Aryabhatta Research Institute
of observational Sciences
SPIM is an optical imaging instrument covering wavelengths ranging from 350 to 1000nm. It employs a 4096 X 4108 CCD camera with a pixel scale of about 0.1 arcsec on the telescope and it covers a field of view of 6.5 x 6.5 arcmin. Currently, Bessel U,B,V,R,I and SDSS u,g,r,i,z filters are available. Stellar images with FWHM less than an arcsec in V-band have been recorded in November 2023. The instrument is available at one of the side-port of the telescope.
| Parameters | Value |
| Type | Imaging |
| Mount position | Side port 2 |
| Wavelength range | 350-1000 nm |
| Array size | 4096 X 4096 pixel2 |
| Pixel size | 15 μm |
| Pixel scale | 0″.1 |
| Field of view | 6′.5 X 6′.5 |
| Readout noise in electron (speed) | 3.8 (100 kHz), 8.5 (1 MHz), 12 (2 MHz ), 23 (4 MHz) |
| Readout time | 20s |
| Gain | 5.3, 3.4 and 1.5 e-/ADU |
| Minimum exposure time | 1 ms |
| Available filters | Bessel: U, B, V, R, I and SDSS: u, g, r, i, z |
| Limiting magnitude | 23.5, 22 mag in V, I bands with an exposure time of 1 hour |
