Measurement of the extragalactic background light at 8600 Å using dark cloud shadow and the Ca II-triplet lines

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Table C.1.

Empirical determination of the attenuation factor at h(τ) = 1 − e^−τ − f_sca(τ) at 8600 Å using scattered starlight from DC303.8-14.2.

	Core-up	Core-low	Core-100″	Bright_rim
	[cgs]	[cgs]	[cgs]	[cgs]
ΔI_obs	19.3	13.0	16.5	36.6
I_EBLh(τ)a,b	1.5	1.5	1.5	1.1
ΔI_sca	20.8	14.5	18.0	37.7
⟨I_ISL⟩ c	223	223	223	223
ΔI_sca/⟨I_ISL⟩=f_sca(τ)	0.093	0.065	0.081	0.17
τ(8600)	> 10	> 10	> 10	∼2
e^−τ	0	0	0	∼14
h(τ)	0.907	0.935	0.919	0.69

^(a)

I_EBLh(τ) is used here as a correction term to be added to ΔI_obs; different values of h(τ) have been iteratively used.

^(b)

The value adopted for I_EBL is 1.62 10⁻⁹erg cm⁻²s⁻¹ Å⁻¹sterad⁻¹.

^(c)

The effective sky brightness at λ = 8600 Å.

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