Duration versus brightness of gamma-ray bursts: Comparisons between SIGNE and BATSE

We analyze duration and brightness distributions of both the SIGNE Venera 13 ampersand 14 and BATSE gamma-ray burst databases. We search for correlations between duration, peak brightness, and the variability measure V, proposed in Lamb, Graziani, and Smith. The duration histogram for SIGNE is consistent with the BATSE histogram. Estimating the instantaneous brightness by C64, we find that SIGNE confirms the BATSE result that the long and short bursts have similar maximum instantaneous brightnesses. Scatterplots between duration, brightness, and V are consistent for both databases; we show that SIGNE confirms the BATSE observation that there is a lack of bursts that are both bright over 1024 ms and contain a short, bright spike