Table 2.
Mean systematic line flux offsets due to calibration or aperture effects between observation blocks determined from MULTIGRIS runs in linear scale.
| Instrument | 1C2S | PLaw | Aperture size |
|
|---|---|---|---|---|
| [″] | [pc] | |||
| IRS/LH (a) | 1.0 | 1.0 | 11.1 × 22.3 | 189 × 379 |
| IRS/SH (a) | 0.6 | 0.9 | 4.7 × 11.3 | 80 × 192 |
| PACS (a) | 0.5 | 0.5 | 28.2 × 28.2 | 479 × 479 |
| FIFI-LS (b) | 0.6 | 0.5 | 13.7 − 29.4 | 233 − 500 |
| SPIRE (b) | 0.6 | 0.6 | 20.0 | 340 |
Notes. Only ionised gas lines were used as constraints. The aperture sizes (in ″ and pc) are added for clarity.
Edge length of the rectangular aperture (Fig. 1).
Radius of the circular aperture. See B22 for the exact SOFIA apertures and their determination. For comparison, the effective radius of the nucleus in the near-infrared bulge is 9.1″ or 150 pc (Iodice et al. 2014).
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