Instrument Performance
Overheads
When estimating the total time required for a programme it is recommended to include about 3min on average for each target acquisition and around 30% of the estimated integration time for instrument overheads. Larger overheads may be justified for programmes requiring many short integrations and/or complex target acquisition (e.g faint sources for spectroscopy in which case time should be allowed for first imaging the field and then offsetting the target into the slit).
Broad Band Limits
| 1 minute | 1 minute | 1 hour | 1 hour | |
| Filter | Continuum
10-16erg.s-1.cm-2.A-1 |
Magnitude | Continuum
10-16erg.s-1.cm-2.A-1 |
Magnitude |
| J (1.25) | 1.4 x 10-2 | 20.7 | 2 x 10-3 | 22.9 |
| H (1.65) | 1.9 x 10-2 | 19.7 | 2.4 x 10-3 | 21.9 |
| Ks (2.16) | 1.2 x 10-2 | 18.7 | 1.6 x 10-3 | 20.9 |
Narrow Band Limits
| 1 minute | 1 minute | 1 hour | 1 hour | |
| Filter | Continuum
10-16erg.s-1.cm-2.A-1 |
Emission Line
10-16erg.s-1.cm-2 |
Continuum
10-16erg.s-1.cm-2.A-1 |
Emission
Line
10-16erg.cm-2.s-1 |
| 1.083 | 6.3 x 10-2 | 9.3 | 8.1 x 10-3 | 1.2 |
| 1.187 | 3.0 x 10-2 | 3.8 | 3.8 x 10-3 | 0.48 |
| 1.215 | 7.5 x 10-2 | 14.5 | 9.5 x 10-3 | 1.9 |
| 1.257 | 3.6 x 10-2 | 7.3 | 4.6 x 10-3 | 0.93 |
| 1.282 | 7.4 x 10-2 | 15 | 9.5 x 10-3 | 1.9 |
| 1.644 | 6.3x 10-2 | 16.5 | 8.1 x 10-3 | 2.1 |
| 1.710 |
6.3 x 10-2 | 17.3 | 8.1 x 10-3 | 2.2 |
| 2.058 | 3.0 x 10-2 | 9.3 | 3.9 x 10-3 | 1.2 |
| 2.090 | 3.1 x 10-2 | 7.0 | 4.0 x 10-3 | 0.9 |
| 2.122 | 2.9 x 10-2 | 9.3 | 3.8 x 10-3 | 1.2 |
| 2.166 | 3.2 x 10-2 | 9.7 | 4.1 x 10-3 | 1.3 |
| 2.195 | 3.6 x 10-2 | 11.4 | 4.6 x 10-3 | 1.5 |
| 2.280 | 3.1 x 10-2 | 10 | 4.0 x 10-3 | 1.3 |
| 2.248 | 3.2 x 10-2 | 9.3 | 4.2 x 10-3 | 1.2 |
| 2.336 |
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Spectroscopic Limits
The sensitivity is a strong function of wavelength. For continuum sources, the sensitivity is plotted separately for the J, Hand Katmospheric windows.
For emission line sources, the sensitivity is plotted separately for the J, Hand Katmospheric windows.
