UNIONS: A direct measurement of intrinsic alignment with BOSS/eBOSS spectroscopy

Open Access

Table 1.

Sample properties used in this work.

	CMASS-UNIONS	LRG-UNIONS	ELG-UNIONS	CMASS-DES Y3	LRG-DES Y3	ELG-DES Y3
N_gal, shape	201 639	78 134	14 762	49 515	22 253	87 929
N_gal, dens	849 637	174 816	83 769	230 831	67 316	89 967
z_eff	0.53	0.74	0.85	0.52	0.75	0.84
σ_e, i	0.16	0.18	0.17	0.17	0.19	0.17
${\bar{n}}_{shape} (z_{eff})$ $\bar{n}_{\mathrm{shape}}(z_{\mathrm{eff}})$ [Mpc⁻³]	2.6	0.59	2.2	3.1	0.62	2.4
${\bar{n}}_{dens} (z_{eff})$ $\bar{n}_{\mathrm{dens}}(z_{\mathrm{eff}})$ [Mpc⁻³]	2.9	0.66	2.4	2.7	0.68	2.5
⟨R⟩	0.79	0.77	0.91	0.66	0.66	0.78
A_shape [deg²]	2845	2589	102	819	682	615
A_dens [deg²]	10 298	5254	568	2816	2099	622
log(⟨L⟩/L₀)	−0.056	0.024	N.A.	−0.11	0.006	N.A.
Extinction	0.04	0.04	0.06	0.09	0.10	0.11

Notes. The effective, z_eff, is used for the covariance matrix estimation and described in Sect. 4.6. The extinction was obtained from the Schlegel et al. (1998) maps. σ_ε, i is the single-component calibrated shape noise, which is also employed in the estimation of the analytical covariance matrix. The fact that the shear responses vary greatly between DES and UNIONS (approx 20%), but the calibrated σ_ε, i are compatible for each population indicates the reliability of the calibration procedure. Finally, L₀ is defined in Sect. 3.4.

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