SpectroCam-10 can operate as a camera, or as a low- or medium- resolution long-slit spectrograph. As a camera, the instrument offers subarcsecond angular resolution with a field of view of 16". As a spectrograph, it can operate in a low (R = 100) or high (R = 2000) resolution mode with a 1" wide by 16" long slit. The instrument is optimized for operation at wavelengths from 8 to 13 microns, and has some capability in the 5 and 20 um bands.
SpectroCam's specifications and sensitivities are summarized in the following tables.
Installation: Cassegrain f/70 focus
Detector: Rockwell 128x128 Si:As BIBIB
75 micron pixels
1.2 x 10^7 e- well depth
Control System: IBM-compatible PC in Cass. cage (DOS)
Sun SparcStation 1+ in data room (UNIX and OpenWindows)
Custom programs for real-time data acquisition and display
IRAF available for data processing
FITS output to Exabyte
Operating Modes: Two gratings and an optical flat provide three different modes.
Quoted sensitivities measured July 1993 and represent
1-sigma in 100 sec on-source integration time.
Camera mode: 0.25"/pixel, 16" dia. unvignetted field (64 pixels)
OCLI silicate filter set, ~1 micron bandpass,
7.9, 8.8, 9.5, 10.3, 11.7, 12.5 microns
Also have 3-5, 8-14, and 17.9 micron filters.
Spectrograph: 16" long slits, 0.25"/pixel in spatial direction
64 spatial x 128 spectral pixels
8-14 micron order-sorting filter
0.5, 1, 2, and 4 arcsec wide slits
Sensitivities with 2" slit, every 2 pixel averaged:
Lores Mode:
0.024 microns per pixel, R~100 with 1" slit
NEFD = 25 mJy/pixel
Line sensitivity = 4.7x10^-14 erg cm^-2 s^-1
HiRes Mode:
0.00128 - 0.00142 microns per pixel, R~2000 with 1" slit
NEFD = 100 mJy/pixel
Line Sensitivity = 1.2x10^-14 erg cm^-2 s^-1
| Camera-Mode Sensitivities | |||||||
|---|---|---|---|---|---|---|---|
| Wavelength (microns) | 7.9 | 8.7 | 9.8 | 10.3 | 11.7 | 12.5 | 17.9 |
| Pt. Src. Sens. (mJy) | 44 | 18 | 21 | 17 | 14 | 30 | 240 |