\begin{table}%t1 \caption {\label{echo}Systems with multiple ($\geq$2) echo outbursts following the main outburst. } \begin{tabular}{lcrccrrrrr} \hline\hline \noalign{\smallskip} $System$ & $Type$ & $P_{\rm orb}$ & $Outb.~year$ & $Passband$ & $No. EO$ & $Mean$~$T_{\rm C}$~$(d)$ & $T_{\rm m}$/$T_{\rm echo}$ & S & q \\ \hline $KS~1731--260$ & $NS~LMXB$ & & 1988 & $X$ & 10 & 51 & 4.97 & 1.3 & \\ $SAX~J1808.4--3658$ & $NS~SXT$ & 2.0142$~h~$[1] & 2000 & $X,~O$~[2,3] & 9 & 13 & 0.13 & ${>}$1.5~[4] & ${\sim}$0.05~[4] \\ $GRO~J0422+32$ & $BH~SXT$ & 5.0920$~h~$[5] & 1992 & $O$~[6] & 2 & 137 & 0.71 & 70~[7] & 0.12~[8] \\ $GRS~1009--45$ & $BH~SXT$ & 6.8449$~h~$[9] & 1993 & $O$~[10] & ${\geq}$3 & ${\sim}$25? & ${\sim}$1 & 24~[7] & 0.14~[9] \\ $XTE~J1859+226$ & $BH~SXT$ & 9.16$~h~$[11] & 1999 & $O$~[12] & ${\geq}$3 & 27 & 2.30 & 115~[12] & \\ $XTE~J1550--564$ & $BH~SXT$ & 37.248$~h~$[13] & 1998 & $X$~[13] & 2 & ${\sim}$320 & 0.37 & 2.8 & ${<}$0.08~[13] \\ $V4641~Sgr$ & $BH~HMXB$ & 67.615$~h~$[14] & 1999 & $O,~X$~[15,16] & ${\geq}$4 & 377~[17] & ${\sim}$0.1 & & 0.67~[18] \\ $V803~Cen$ & $DN$ & 0.44333$~h~$[19] & 2003 & $O$~[20] & ${\geq}$9 & 0.8 & & & 0.08:~[21] \\ $2003aw$ & $DN$ & 0.56568$~h~$[22] & 2004 & $O$~[22] & ${\sim}$5 & ${\sim}$5 & & & \\ $WZ~Sge$ & $DN$ & 1.3605$~h~$[23] & 2001 & $O$~[24] & 12 & 1.7 & 0.83 & & 0.09~[25] \\ $EG~Cnc$ & $DN$ & 1.4105$~h~$[26] & 1996 & $O$~[26] & 6 & 7.3 & 0.45 & & \\ $SDSS~J080434+510349$ & $DN$ & 1.4167$~h~$[27] & 2006 & $O$~[28] & 11 & 2.6 & & & \\ $UZ~Boo$ & $DN$ & 1.4568$~h~$[29] & 2003 & $O$~[30] & ${\sim}$4 & ${\sim}$3 & 0.68 & & \\ \noalign{\smallskip} \hline \end{tabular} \tablebib { 1. Chakrabarty \& Morgan (\cite{Chakrabarty98}); 2. Wijnands et~al. (\cite{Wijnands01}b); 3. Wijnands (\cite{Wijnands06}); 4. Deloye et~al. (\cite{Deloye08}); 5. Chevalier \& Ilovaisky (\cite{Chevalier94}); 6. Callanan et~al. (\cite{Callanan95}); 7. Chen et~al. (\cite{Chen97}); 8. Webb et~al. (\cite{Webb00}); 9. Filippenko et~al. (\cite{Filippenko99}); 10. Bailyn \& Orosz (\cite{Bailyn95}); 11. Filippenko \& Chornock (\cite{Filippenko01}); 12. Zurita et~al. (\cite{Zurita02}); 13. Orosz et~al. (\cite{Orosz02}); 14. Goranskij (\cite{Goranskij01}); 15. Uemura et~al. (\cite{Uemura02}); 16. Maitra \& Bailyn (\cite{Maitra06}); 17. \v{S}imon (\cite{vSimon08}); 18. Orosz et~al. (\cite{Orosz01}b); 19. Roelofs et~al. (\cite{Roelofs07}b); 20. Kato et~al. (\cite{Kato04}); 21. Roelofs et~al. (\cite{Roelofs07}a); 22. Nogami et~al. (\cite{Nogami04}); 23. Skidmore et~al. (\cite{Skidmore97}); 24. Patterson et~al. (\cite{Patterson02}); 25. Steeghs et~al. (\cite{Steeghs07}); 26. Patterson et~al. (\cite{Patterson98}); 27. Szkody et~al. (\cite{Szkody06}); 28. Pavlenko et~al. (\cite{Pavlenko06}); 29. Szkody (\cite{Szkody87}); 30. Henden (2008, priv. comm.).}\vspace*{3mm} \end{table}