Table 3
Average values of some properties of the sample of events with known Eγ, iso.
| Properties | Short | Intermediate | Long |
|
|
|||
|
0.5 ± 0.3 | 1.8 ± 1.5 | 2.2 ± 1.3 |
|
0.6 ± 0.5 | 10 ± 6 | 110 ± 110 |
|
0.4 ± 0.4 | 4 ± 4 | 40 ± 40 |
|
50.4 ± 0.9 | 51.6 ± 1.0 | 52.7 ± 0.8 |
|
90 ± 180 | 200 ± 300 | 300 ± 500 |
|
|
|||
|
50.7 ± 0.9 | 50.7 ± 1.0 | 50.8 ± 0.8 |
|
50.9 ± 0.9 | 51.1 ± 1.2 | 51.3 ± 0.9 |
|
|
|||
|
2000 ± 800 | 1200 ± 500 | 700 ± 300 |
|
700 ± 300 | 420 ± 190 | 150 ± 60 |
Notes. The first five columns display averages of observed properties:
is the average redshift,
is the average duration,
is the average intrinsic burst duration 
,
is the average of log (Eγ, iso), and
is the average peak energy. The next two rows correspond to values readily computed
from the observed ones:
is the average of
log (Lγ, iso) = log (Eiso/T90),
and
is the average of 
. The final two
rows display different estimates of the Lorentz factor of the ejecta assuming that the
external medium density is next = 10 cm-3 and
that it is either thick (Γthk; ξ = 0.35) or thin
(Γthn; ξ = 3).
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