Table 3
Performance and capabilities improved from MATISSE to current GRA4MAT, and future planned improvements when GPAO becomes available on the UTs.
| Metric | MATISSE | GRA4MAT | GRA4MAT+GPAO | ||
|---|---|---|---|---|---|
| L-band spectral resolution and instantaneous coverage | |||||
| LM low (R ~ 35, 2.9 µm to 5.0 µm) | 100% | 100% | |||
| LM medium (R ~ 500, 2.9 µm to 5.0 µm) | 6.4% 0.16µm | 100% | Sect. 4.1 | ||
| L high (R ~ 1000, 2.9 µm to 4.2 µm) | 6.4% 0.8 µm | 100% | |||
| L high+ (R ~ 3300, 4.02 µm to 5.0 µm) | 0% | 100% | |||
| Detector integration time (s) | |||||
| L low | 1 | 1 | |||
| L medium | 8.5 | 10 | Sect. 4.2 | ||
| L high | Not offered | 10 | |||
| L high+ | Not offered | 10 | |||
| M low | 2 | 0.7 | |||
| M medium | 13 | 11 | Sect. 4.2 | ||
| M high+ | Not offered | 17 | |||
| N low | 17 | 3 | |||
| N high | Not offered | 26 | |||
| AT correlated flux sensitivity within 30% best conditions (Jy) | |||||
| L low | 1 | 0.2 | |||
| L medium | 8.5 | 1 | Sect. 4.2 | ||
| L high | Not offered | 2 | |||
| L high+ | Not offered | 10 | |||
| M low | 2 | 0.7 | |||
| M medium | 13 | 11 | Sect. 4.2 | ||
| M high+ | Not offered | 17 | |||
| N low | 17 | 3 | |||
| N high | Not offered | 26 | Set. 4.3 | ||
| UT correlated flux sensitivity within 30% best conditions (Jy) | |||||
| L low | 0.06 | 0.02 | 0.01 | ||
| L medium | 0.6 | 0.3 | Sect. 4.2 | 0.05 | Sect. 5.2 |
| L high | Not offered | 0.7 | 0.1 | ||
| L high+ | Not offered | 6 | 0.5 | ||
| M low | 0.5 | 0.07 | 0.035 | ||
| M medium | 1.3 | 1 | Sect. 4.2 | 0.55 | Sect. 5.2 |
| M high+ | Not offered | 6 | 0.85 | ||
| N low | 0.9 | 0.1 | Sect. 4.3 | ||
| N high | Not offered | 0.5 | |||
| Raw contrast | |||||
| 30% best conditions | 0.85 ± 0.06 | 0.93 ± 0.02 | |||
| 50% best conditions | 0.81 ± 0.08 | 0.93 ± 0.02 | Sect. 4.4 | ||
| Observing capabilities | |||||
| AT chopping: photometry & visibility | Yes | Yes | |||
| UT chopping: photometry & visibility | Yes | No | Sect. 2.6 | Yes | Sect. 5.2 |
| Narrow off-axis observations | No | Yes | Sect. 2.5 | ||
Notes. Detailed explanations are available in the referenced §X.X sections. More updated values, covering a wider range of atmospheric conditions, are available on the VLTI/MATISSE instrument page of the ESO website (https://www.eso.org/sci/facilities/paranal/instruments/matisse.html).
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