... afterglow

Table 1 is only available in electronic form at http://www.aanda.org

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... SPI-ACS

http://isdc.unige.ch/cgi-bin/cgiwrap/~beck/ibas/spiacs/ibas_acs_web.cgi

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... band

http://www.ioffe.rssi.ru/LEA/GRBs/GRB070724_T84307/

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...$10^{-6}~{\rm erg~cm^{-2}~s}^{-1}$)

Here we assumed the spectral shape as provided by Konus for the time-averaged spectrum. If we assume a power law shape with photon index in the range 1-2, this number varies from $\sim$7 to $\sim$ $12~{\rm ph~cm^{-2}~s^{-1}}$.

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... events

Adopting the method of the analysis in (De Pasquale et al. 2003), the optical-to-X-ray flux ratio is $f_{\rm oX} \leq 2 \div 7$.

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