High angular resolution polarimetric imaging of the nucleus of NGC 1068 - Disentangling the polarising mechanisms

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Table 2.

Contribution of dichroism to the polarised flux in different apertures for a given band (in %).

Aperture			Filter	Name
size (in ″)	NR	Cnt H	H	Cnt K1	Ks	Cnt K2

Wvl (nm)	646	1573	1625	2091	2182	2266
0.2	– ⁽¹⁾	98.5	98.2	98.3	99.6	99.0
0.5	– ⁽¹⁾	54	58	55	74	63
1	– ⁽¹⁾	40	43	42	64	51
3	– ⁽¹⁾	26	30	31	53	38

Notes. Polarisation uncertainties range between 0.5% and 1% for all measurements except for NR and thus a conservative value for uncertainties of 1% is taken.

⁽¹⁾

The central polarisation feature that is expected to be caused by dichroic absorption is weaker in the NR band and estimation of different contributions is thus not reliable in this band (large incertitudes).

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