Table 2: Average burst properties of all superbursters (above the dividing line) and six non-superbursters, as observed with BeppoSAX-WFC.
Object name $T_{\rm C}^{\rm (a)}$ $\alpha^{\rm (b)}$ $\alpha^{\rm (c)}$ $\tau^{\rm (d)}$ [s]
4U 1254-69 4.6 4800   $6\pm2$ (15)
4U 1636-536 0.6 440 44-336 $^{\rm [1]}$ $6.2\pm0.1$ (67)
KS 1731-260 $^{\rm (e)}$ 0.8 780 30-690 $^{\rm [2]}$ $5.6\pm0.2$ (37)
4U 1735-444 2.4 4400 220-7728 $^{\rm [3]}$ $3.2\pm0.3$ (34)
GX 3+1 1.2 2100 1700-  
      21 000 $^{\rm [4]}$ $4.6\pm0.1$ (61)
4U 1820-303 1.5 2200   $4.5\pm0.2$ (47)
Ser X-1 2.9 5800   $5.7\pm0.9$ (7)
EXO 0748-676 1.0 140 18-34 $^{\rm [5]}$ $12.8\pm0.4$ (155)
4U 1702-429 0.3 58   $7.7\pm0.2$ (107)
4U 1705-44 1.1 1600 55-1455 $^{\rm [6]}$ $8.7\pm0.4$ (74)
GX 354-0 0.2 97 105-140 $^{\rm [7]}$ $4.7\pm0.1$ (417)
A 1742-294 0.4 130   $16.8\pm1.0$ (141)
GS 1826-24 0.2 32 41 $^{\rm [8]}$ $30.8\pm1.5$ (248)
$^{\rm (a)}$ Average wait time between bursts in days. $^{\rm (b)}~\alpha$ is ratio of average persistent 2-28 keV flux (in WFC c s-1 cm-2) times average wait time between two bursts (2nd column) and burst fluence (in WFC c cm-2). $^{\rm (c)}~\alpha$from literature if covering the largest persistent flux range known ([1] Lewin et al. 1987; [2] Muno et al. 2000, [3] van Paradijs et al. 1988b; [4] den Hartog et al. 2003; [5] Gottwald et al. 1987; [6] Gottwald et al. 1989; [7] Basinska et al. 1984; [8] Galloway et al. 2003). $^{\rm (d)}$ e-folding decay time of the average 2-28 keV burst profile; between parentheses the number of bursts averaged. $^{\rm (e)}$ This is a transient and only data are given for persistent flux levels comparable to when the superburst occurred.

Source LaTeX | All tables | In the text