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Table 1

Details of the data sets used for the map reconstruction.

Identifyer Telescope Survey # Observed wavelengths Frequency range/MHz Method # Data points Catalog reference Survey reference
Bonafede VLA 3–5 variousa λ2-fit 7 (1)
Broten variousb variousb variousb λ2-fit 121+3/2c (2)
Brown CGPS DRAO ST CGPS 4 1403–1438 λ2-fit 380 (3) (4)
Brown SGPS ATCA SGPS 12 1332–1436 λ2-fit 148 (5) (6), (7)
Clarke VLA 4,6 1365–4885 λ2-fit 125 (8), (9)
Clegg VLA 6 1379–1671 λ2-fit 56 (10)
Feain ATCA Cent. A 24 1280–1496 RM synthesis 281 (11) (12)
Gaensler ATCA SGPS test 9 1334–1430 λ2-fit 18 (13)
Hammond ATCA 23 1332–1524 RM synthesis 88 (14)
Heald WSRT WSRT-SINGS 1024 1300–1763 RM synthesis 57 (15) (16)
Hennessy VLA 4 1362–1708 λ2-fit 17 (17)
Johnston-Hollitt A ATCA 23 1292–1484 RM synthesis 68 (18)
Johnston-Hollitt B ATCA 4 1384–6176 λ2-fit 12 (19), (20)
Kato Nobeyama 4d 8800–10 800d λ2-fit 1 (21)
Kim variouse variouse variouse λ2-fit 20+1/2c (22)
Klein VLA & Effelsberg B3/VLA 4 1400–10 600 λ2-fit 143 (23) (24), (25)
Lawler variousf variousf variousf λ2-fit 3 (26) (27)
Mao SouthCap ATCA 32 1320–2432 RM synthesis 329 (28)
Mao NorthCap WSRT 16 1301–1793 RM synthesis 400 (28)
Mao LMC ATCA 14 1324–1436 RM synthesis 188 (29), (30)
Mao SMC ATCA 14 1324–1436 λ2-fit 62 (31)
Minter VLA 4 1348–1651 λ2-fit 98 (32)
Oren VLA 4,6 variousg λ2-fit 51+4/2c (33)
O’Sullivan ATCA 100 1100–2000 RM synthesis 46 (34)
Roy ATCA & VLA 4 and more varioush λ2-fit 67 (35)
Rudnick VLA 2 1440–1690 λ2-fit 17+2/2c (36)
Schnitzeler ATCA 12 1320–11 448i RM synthesis 178 (37)
Simard-Normandin variousj variousj variousj λ2-fit 535+6/2c (38)
Tabara variousk variousk variousk λ2-fit 62+3/2c (39)
Taylor VLA NVSS 2 1344–1456 λ2-fit 37 543 (40) (41)
Van Eck VLA 14 1353–1498 RM synthesisl 194 (42)
Wrobel VLA 6 1373–1677 λ2-fit 5+1/2c (43)

Notes. 

(a)

Three different frequency ranges, 4510–8490 MHz, 4510–8300 MHz, 1340–4960 MHz, were used.

(b)

Compilation of several previously published data sets.

(c)

Data points that seem to be duplications of the same observations, appearing in two different catalogs, are used only once and denoted as half data points for both catalogs, so that the sum of the data points is the total number of data points used.

(d)

Additional data from (31) used in the fit.

(e)

Compilation of several earlier data sets, including an unpublished one for which no details are provided.

(f)

Compilation of several earlier data sets and the one described in (22).

(g)

Three different frequency ranges, 1360–1690 MHz, 1373–4898 MHz, 1373–4990 MHz, were used.

(h)

The frequency range is 4736–8564 MHz for the ATCA observations and 4605–8655 MHz for the VLA observations.

(i)

The frequency range is shifted to lower frequencies by up to 40 MHz for some sources.

(j)

RMs calculated from previously published and unpublished data, as well as new measurements with various instruments.

(k)

RMs calculated from previously published polarization data.

(l)

λ2-fits were also produced and found to agree with the synthesis results.

References. (1) Bonafede et al. (2010); (2) Broten et al. (1988); (3) Brown et al. (2003a); (4) Taylor et al. (2003); (5) Brown et al. (2007); (6) Haverkorn et al. (2006b); (7) McClure-Griffiths et al. (2005); (8) Clarke et al. (2001); (9) Clarke (2004); (10) Clegg et al. (1992); (11) Feain et al. (2009); (12) Feain et al. (2011); (13) Gaensler et al. (2001); (14) Hammond (priv. comm.); (15) Heald et al. (2009); (16) Braun et al. (2007); (17) Hennessy et al. (1989); (18) Johnston-Hollitt (in prep.); (19) Johnston-Hollitt (2003); (20) Johnston-Hollitt & Ekers (2004); (21) Kato et al. (1987); (22) Kim et al. (1991); (23) Klein et al. (2003); (24) Gregorini et al. (1998); (25) Vigotti et al. (1999); (26) Lawler & Dennison (1982); (27) Dennison (1979); (28) Mao et al. (2010); (29) Mao (in prep.); (30) Gaensler et al. (2005); (31) Mao et al. (2008); (32) Minter & Spangler (1996); (33) Oren & Wolfe (1995); (34) O’Sullivan (priv. comm.); (35) Roy et al. (2005); (36) Rudnick & Jones (1983); (37) Schnitzeler (in prep.); (38) Simard-Normandin et al. (1981); (39) Tabara & Inoue (1980); (40) Taylor et al. (2009); (41) Condon et al. (1998); (42) Van Eck et al. (2011); (43) Wrobel (1993).

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