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Table 3

Values of differential rotation parameters A and B and their standard errors (in deg/day) collected from different sources using only sunspots and sunspot groups as tracers.

Row Data set Time Hemisphere A B References
1 GPRa 1874–1976 N+S 14.551 ± 0.006 −2.87 ± 0.06 1
2 GPRa 1874–1902 N+S 14.63 ± 0.01 −2.70 ± 0.16 2
3 GPRa 1879–1975 N+S 14.522 ± 0.005 −2.66 ± 0.04 3
4 GPRb 1880–1976 N+S 14.37 ± 0.01 −2.59 ± 0.16 4
5 GPRa 1883–1893 N+S 14.63 ±− −2.69 ±− 5
6 GPRa 1940–1968 N+S 14.53 ± 0.01 −2.83 ± 0.08 6
7 GPRa 1948–1976 N+S 14.52 ±− −2.84 ±− 5
8 EGRa 1878–2011 N+S 14.49 ± 0.01 −2.64 ± 0.05 7
9 EGRa 1976–2002 N+S 14.457 ± 0.009 −2.17 ± 0.07 3
10 EGRc 1874–1996 N+S 14.531 ± 0.003 −2.747 ± 0.048 8
11 CSc 1853–1893 N+S 14.475 ± 0.011 −2.710 ± 0.165 8
12 Spörera 1883–1893 N+S 14.50 ±− −2.41 ±− 5
13 Abastumanid 1950–1990 N+S 14.73 ± 0.06 −2.07 ± 0.51 9
14 Mt. Wilsond 1921–1982 N+S 14.522 ± 0.004 −2.84 ± 0.04 10
15 Mt. Wilsona 1921–1982 N+S 14.393 ± 0.010 −2.95 ± 0.09 10
16 DPDa 1974–2016 N+S 14.50 ±0.01 −2.54 ± 0.07 11
17 KSOc 1970–1979 N+S 14.27 ± 0.02 −1.84 ± 0.12 12
18 KSOc 1947–1981 N+S 14.38 ± 0.01 −2.57 ± 0.07 13
19 KSOa 1948–1976 N+S 14.35 ±− −2.73 ±− 5
20 KSOa 1964–2016 N+S 14.47 ± 0.01 −2.66 ± 0.10 15
21 KSOa 1964–2016 N+S 14.50 ± 0.01 −2.87 ± 0.12 16
22 GPRa 1874–1976 N 14.54 ± 0.01 −2.88 ± 0.08 1
23 GPRa 1874–1902 N 14.65 ± 0.02 −2.89 ± 0.16 2
24 GPRa 1879–1975 N 14.531 ± 0.005 −2.63 ± 0.06 3
25 GPRa 1940–1968 N 14.51 ± 0.01 −2.69 ± 0.11 6
26 EGRa 1976–2002 N 14.462 ± 0.015 −2.13 ± 0.10 3
27 EGRc 1874–1996 N 14.53 ± 0.01 −2.69 ± 0.07 8
28 CSc 1853–1893 N 14.48 ± 0.02 −3.02 ± 0.26 8
29 KSOc 1947–1981 N 14.38 ± 0.01 −2.70 ± 0.09 13
30 KSOc 1964–1976 N 14.40 ± 0.02 −2.75 ± 0.24 14
31 KSOa 1964–2016 N 14.47 ± 0.02 −2.82 ± 0.14 17
32 KSOa 1964–2016 N 14.49 ± 0.02 −2.94 ± 0.17 18
33 GPRa 1874–1976 S 14.56 ± 0.01 -2.85 ± 0.09 1
34 GPRa 1874–1902 S 14.61 ± 0.02 −2.56 ± 0.16 2
35 GPRa 1879–1975 S 14.517 ± 0.005 −2.68 ± 0.05 3
36 GPRa 1940–1968 S 14.55 ± 0.01 −3.00 ± 0.13 6
37 EGRa 1976–2002 S 14.448 ± 0.015 −2.20 ± 0.10 3
38 EGRc 1874–1996 S 14.54 ± 0.01 −2.81 ± 0.07 8
39 CSc 1853–1893 S 14.48 ± 0.02 −2.51 ± 0.22 8
40 KSOc 1947–1981 S 14.38 ± 0.01 −2.34 ± 0.11 13
41 KSOc 1964–1976 S 14.37 ± 0.02 −2.48 ± 0.27 14
42 KSOa 1964–2016 S 14.47 ± 0.01 −2.51 ± 0.13 19
43 KSOa 1964–2016 S 14.51 ± 0.02 −2.81 ± 0.17 20

Notes. N denotes the northern hemisphere, S denotes the southern hemisphere, and N+S both hemispheres together. In Col. 2: GPR – Greenwich photoheliographic results, EGR – extended Greenwich results, KSO – Kanzelhöhe Observatory for Solar and Environmental Research data, CS – Carrington & Spörer data, DPD – Debrecen photoheliographic results. Type of tracers:

(a)

sunspot groups;

(b)

stable recurrent sunspot groups;

(c)

sunspots and sunspot groups;

(d)

sunspots.

Reference. (1) Balthasar et al. (1986b); (2) Arévalo et al. (1982); (3) Javaraiah (2003); (4) Brajša et al. (2002a); (5) Balthasar & Fangmeier (1988); (6) Balthasar & Wöhl (1980); (7) Sudar et al. (2014); (8) Pulkkinen & Tuominen (1998); (9) Khutsishvili et al. (2002); (10) Howard et al. (1984); (11) Sudar et al. (2017); (12) Lustig (1982); (13) Lustig (1983); (14) Lustig (1983), cycle 20; (15) present work, Table 2, row 7, DS; (16) present work, Table 2, row 28, rLSQ; (17) present work, Table 2, row 14, DS; (18) present work, Table 2, row 35, rLSQ; (19) present work, Table 2, row 21, DS; (20) present work, Table 2, row 42, rLSQ.

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