Modelling of surface brightness fluctuation measurements - Methodology, uncertainty, and recommendations

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Volume 686 (June 2024)

A&A, 686 (2024) A62

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Table 3.

Mean fitted SBF $⟨ {\bar{N}}_{fit} ⟩$ $\langle \bar{N}_{\mathrm{fit}} \rangle$ and upper 90% percentile of the relative error (ε_rel, 90%), applying different offsets (±3% and ±9%) to Gal_mean, N_Sky, and σ_PSF with respect to the reference case of Fig. 4.

	$⟨ {\bar{N}}_{fit} ⟩$ $\langle \bar{N}_{\mathrm{fit}} \rangle$ [counts]			ε_rel, 90% [%]
χ_offset	Gal_mean	N_Sky	σ_PSF	Gal_mean	N_Sky	σ_PSF
0%		22.53		2.88
−3%	24.98	29.87	21.95	12.9	35.3	4.8
+3%	23.5	29.66	23.63	5.9	33.9	7.2
−9%	40.72	87.23	20.52	82.9	291.4	11.1
+9%	33.81	86.33	24.87	51.8	286.4	12.4

Notes. The reference case has an input SBF of ${\bar{N}}_{ref} = 22.59$ $\bar{N}_{\mathrm{ref}}=22.59$ and, after performing 50 simulations, its fitting returned: $⟨ {\bar{N}}_{fit} ⟩ = 22.53$ $\langle \bar{N}_{\mathrm{fit}} \rangle=22.53$ counts and ε_rel, 90% = 2.88%.

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