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Table 4

Comparison of values of α estimated from the ratio of optical thickness τ193/τ211 and indirectly from measurements.

Observ. Date and time in UT α using α mea- M193 using α ΔM193
No. of SLS obs. in Hα τ 193 / τ 211 sured measured [kg] [%]

19 Apr. 2011
0.01–0.37
1 06:55:12 – 0.46 6.9 × 1010 −76
mean  0.02
–08:12:28
5 May 2011
0.02–0.99
2 large prom. 11:55:09 – 0.39 3.3 × 1011 −50
mean  0.19
–12:00:43
2 small prom.a 5 May 2011 0.20* 0.27 7.6 × 109 + 27
5 May 2011
0.01–1.00
3 12:13:11 – 0.50 2.6 × 1011 −28
mean  0.45
–12:21:03
6 May 2011
0.01–0.14**
4b 12:48:31 – 0.49 1.2 × 1011 −68
mean  0.04
–12:54:19
8 May 2011
0.02–0.92
5 14:12:17 – 0.66 7.6 × 1011 −31
mean  0.24
–14:16:16
18 May 2011
0.00–1.00
6 09:08:51 – 0.52 7.3 × 1011 −57
mean  0.29
–11:50:32

Notes. The first three columns are the same as in Table 3. In next three columns the following quantities are listed: α measured – value of α obtained from the ILMB and IDSK intensities using Eq. (18), 193 Å based mass obtained using the α measured, and a difference from the mass listed in Table 3 calculated using α-maps obtained from the τ193/τ211 ratio. Meanings of the marks a, b, *, ** are the same as in Table 3.

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