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Table 2:

Summary of measurements.
Burst source Mean burst duration (s)a Tail/prompt ratio Ref.b
  time scalec $\tau_2^d$ taile in timef in fluenceg  
Sources discussed here
GS 1826-24 $39.4\pm0.2$ 44.6 $1252\pm25$ 32/28 0.03 (300 s)  
      (600-5500 s)      
      $\chi^2/\nu$ = 16.9/15      
4U 1728-34 $5.85\pm0.02$ 12.6 $313\pm17$ 53/25 0.09 (100 s)  
      (200-800 s)      
      $\chi^2/\nu$ = 13.4/11      
EXO 0748-676 $13.7\pm0.1$ 36.3 $300\pm42^h$ 22/8 0.01 (300 s)  
      (400-1200 s)      
      $\chi^2/\nu$ = 141/44      
Literature cases
GX 3+1 $3\pm1$ 6 1110 $\pm $ 170 370/185 40 (10 s) 1
M 28   7.5 800-3250 $\sim$100 >1.4i (90 s) 2
Aql X-1 18.4   $627\pm100$ 34   3
OSO-8 long burst 44.8   215.7 5 0.01 (150 s) 4
a Averaged over the bursts cataloged by Galloway et al. (2008); b references: 1 - Chenevez et al. (2006); 2 - Gotthelf & Kulkarni (1997); 3 - Czerny et al. (1987); 4 - Swank et al. (1977); c the time scale is defined as the burst fluence divided by the peak flux; d $\tau_2$ is the e-folding decay time of the final part of the prompt burst; e the time range in parentheses refers to the interval in which the fit was carried out; f the two numbers refer to division by the mean time scale and $\tau_2$, respectively; g fluences for GS 1826-24 and 4U 1728-34 were determined from data averaged over multiple bursts; that for EXO 0748-676 from the RXTE triple burst. The time between parentheses refers to the interval for the prompt emission; h this value applies to the triple burst only and excluding times for the second burst; i based on counts of 0.8-12 keV photons in ASCA-GIS (Table 1 in Gotthelf & Kulkarni 1997).

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