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Table 2.

Characteristics of the eight transient brightenings presented in this work.

Case IRIS slit Type of Duration Delay of UV Surge
brightening (min) burst (min)
1 No EB + UV burst 31 + 38 (a), 25.5 + 36 (b) 1 Yes
2 Yes EB + UV burst 21, 15 6 Yes
3 Yes EB + UV burst 22, 7.5 0.5 Yes
4 Yes EB 9 No
5 Yes EB + UV burst 6, 4.5 (c) 0.5 Yes
6 No UV burst 47+19 (b) Yes
7 Yes UV burst 6+7+1 (b) Yes
8 Yes UV burst 7+6+2 (b) Yes

Case Mg II triplet Mn I absorption on Ni II absorption Coronal response AIA 170 nm
emission Mg II k blue wing on Si IV 139.4 nm in AIA brightening

1 No Yes
2 Yes Yes (d) Yes No Yes
3 Yes Yes (d) (weak) Yes No Yes
4 No No No
5 Yes (weak) No No No Yes
6 Yes Yes
7 No Yes (very weak) No No Yes
8 No No Yes No (Yes in 30.4 nm) No

Notes. Columns are as follows: event happens at the slit positions of the IRIS spectrograph, type of brightening, duration of each reconnection event (in minutes, first number refers to the EB, second number to the Si IV UV burst, separated by a comma), delay of the UV burst with respect to the EB (in minutes, only for cases where both co-exist), presence of an associated surge, existence of Mg II triplet in emission, existence of Mn I absorption lines superimposed on the blue wing of Mg II k profiles, existence of Ni II absorption lines superimposed on the Si IV 139.4 nm profiles, coronal response in the AIA channels, and brightening in the AIA 170 nm channel.

(a)

This EB presents several brightenings. These numbers refer to each brightening.

(b)

This UV burst presents several brightenings. These numbers refer to each brightening.

(c)

These events present several intensity peaks. These values refer to the peaks with higher intensity.

(d)

During some time steps.

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