Quasi-stellar objects in the ALHAMBRA survey - I. Photometric redshift accuracy based on 23 optical-NIR filter photometry

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Volume 542 (June 2012)

A&A, 542 (2012) A20

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Table 2

ALHAMBRA filter characteristics.

Name	λ_mean	FWHM	AB	Offset	⟨ m ⟩	⟨ σ(m) ⟩
	(μm)	(μm)	corr.		(AB)
(1)	(2)	(3)	(4)	(5)	(6)	(7)

A366M	0.3661	0.0279	0.96	–0.033	21.81	0.08
A394M	0.3941	0.0330	0.02	–0.210	21.60	0.05
A425M	0.4249	0.0342	–0.13	–0.081	21.65	0.05
A457M	0.4575	0.0332	–0.18	–0.011	21.62	0.07
A491M	0.4913	0.0356	–0.05	–0.065	21.54	0.06
A522M	0.5224	0.0326	–0.04	–0.054	21.48	0.06
A551M	0.5510	0.0297	0.01	0.003	21.48	0.07
A581M	0.5809	0.0324	0.07	–0.001	21.39	0.05
A613M	0.6134	0.0320	0.13	0.009	21.35	0.06
A646M	0.6461	0.0357	0.23	0.006	21.33	0.08
A678M	0.6781	0.0314	0.24	–0.046	21.20	0.06
A708M	0.7078	0.0332	0.29	–0.055	21.14	0.05
A739M	0.7392	0.0304	0.34	0.007	21.16	0.06
A770M	0.7699	0.0354	0.39	0.000	21.11	0.06
A802M	0.8020	0.0312	0.44	0.002	21.06	0.07
A829M	0.8294	0.0296	0.48	0.007	21.00	0.08
A861M	0.8614	0.0369	0.54	–0.023	20.91	0.05
A892M	0.8918	0.0303	0.50	0.022	20.93	0.08
A921M	0.9208	0.0308	0.48	0.028	20.83	0.10
A948M	0.9482	0.0319	0.52	0.077	20.65	0.15
J	1.2094	0.2471	0.87	0.104	20.65	0.06
H	1.6482	0.2665	1.38	0.186	20.41	0.08
Ks	2.1409	0.3040	1.83	0.155	20.20	0.09

Notes. Columns: (1) filter name; (2) filter mean wavelength; (3) filter FWHM; (4) AB-Vega magnitude correction: m_AB = m_Vega + AB_correction; (5) offsets applied to each filter as m_final = m_filter + offset during the photometric redshift determination (see Sect. 3.3 for details); (6) mean magnitude in each filter band for the spectroscopic sample (Sect. 2.3); (7) mean magnitude errors in each filter band for the spectroscopic sample.

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