  The proportional counter and scintillator on Ginga provided unprecented
spectral coverage of GRBs, from 2 - 400 keV. Below 20 keV we find evidence for
a positive spectral number index in approximately 40% of our burst sample, with
some evidence for a strong rolloff at lower energies in a few events. There is
a correlation (Pearson's r = -0.62) between the low energy slope and the bend
energy. We find that the distribution of spectral bend energies extends below
10 keV. There has been some concern in cosmological models of GRBs that the
bend energy covers only a small dynamic range. Our result extends the observed
dynamic range and, since we observe bend energies down to the limit of our
instrument, perhaps observations have not yet limited the range. The Ginga
trigger range was virtually the same as BATSE's, yet we find a different range
of fit parameters. One possible explanation might be that GRBs have two break
energies, one often in the 50 to 500 keV range and the other near 5 keV. Both
BATSE and Ginga fit with only a single break energy so BATSE tends to find
breaks near the center of its energy range and we tend to find breaks in our
energy range. The observed ratio of energy emitted in the x-rays relative to
the gamma-rays can be much larger than a few percent and, in fact, is sometimes
larger than unity. The average for our 22 bursts is 24%. There is one example
of a strong x-ray excess at low energy.
