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Table 1.

AGN sample.

Name Coordinates (J2000) Heliocentric z Hubble distance Proposal ID (Filter) Exposure time (s)
5918 (F502M) 5262
Mrk 3 93.901519°, 71.037525° 0.013509 59.59 Mpc 6702 (F275W)1 5187
6702 (F342W)1 1697

NGC 3862 176.270871°, 19.606317° 0.021595 100.33 Mpc 4833 (F342W) 896

Mrk 78 115.673881°, 65.177072° 0.037983 168.74 Mpc 5918 (F502M) 9122

3790 (F320W)2 602
Cygnus A 299.868153°, 40.733916° 0.056200 245.32 Mpc 6510 (F275W) 14148
6510 (F342W) 48789

3C 109 63.418208°, 11.203833° 0.306000 1351.57 Mpc 6927 (F342W) 603

Notes. The five AGNs we studied, ordered by increasing distance. The coordinates are given in the J2000 equatorial system, the redshifts are heliocentric (i.e., the Earth’s rotational and orbital motions were removed from the measured velocity), and the Hubble distances use the standard ΛCDM cosmology (H0 = 67.8 km/sec/Mpc, Ωmatter = 0.308, Ωvacuum = 0.692; Planck Collaboration XIII 2016). 1: Polarization maps published by Kishimoto et al. (2002), but reprocessed with our pipeline. 2: Integrated polarization value published by Antonucci et al. (1994), Hurt et al. (1999).

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