Table 1
Image reconstruction parameters and quality of the reconstructed FS CMa images.
| Wavelength r (a) | Bin(b) | CP(c) | V2 (d) | CP err.(e) | V2 snr(f) | FOV(g) | npix(h) | Cost(i) | Reg.(j) | Opt.(k) | Weight(l) | Mask(m) | CP res.(n) | V 2res(n) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3.4–3.8 μm | 1 | 11 355 | 17 033 | 2.9° | 18.4 | 80 | 64 | 3 | 6 | 2 | 0.5 | 30–42 | 2.9° | 0.009 |
| 8.6–9.0 μm | 11 | 2084 | 3079 | 10.0° | 11.5 | 360 | 128 | 2 | 3 | 1 | 0.0 | 160–190 | 7.5° | 0.021 |
Notes. (a)Wavelength range used for image reconstruction. (b)Number of spectral channels binned (spectral binning; see Sect. 2.2 for details). (c)Number of closure phases. (d)Number of visibilities. (e)Mean closure phase error of the data. (f)Mean signal-to-noise ratio of the visibilities. (g)FOV of the reconstruction in mas. (h)Pixel grid npix × npix used in the image reconstruction. (i)Number of the cost function as defined in Hofmann et al. (2014) and the Appendix D. (j)Regularization function number as defined in the same paper. (k)Optimization routine number as defined in the Appendix D. (l)Power of the uv density weight (see Hofmann et al. 2014). (m)Radii used for the image space mask in mas. (n)Closure phase (CP) and squared visibility (V2) residuals derived from the measured closure phases and visibilities, and from the closure phases and visibilities calculated from the reconstructed images.
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