[vsnet-grb-info 7598] GRB 090417B: Swift-BAT further refined analysis
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Sun Apr 19 00:31:29 JST 2009
TITLE: GCN CIRCULAR
NUMBER: 9153
SUBJECT: GRB 090417B: Swift-BAT further refined analysis
DATE: 09/04/18 15:31:19 GMT
FROM: Scott Barthelmy at NASA/GSFC <scott at lheamail.gsfc.nasa.gov>
S. D. Barthelmy (GSFC), D. M. Palmer (LANL), B. Sbarufatti (INAF-IASFPA)
(for the Swift-BAT team):
Continuing the analysis for BAT GRB 090417B (trigger #349450)
(Cummings, GCN Circ 9139) using more downlinked data, we report that
this burst is very long. The revised mask-weighted light curve
starts before T-200 sec (where we start collecting event data
on each trigger), slowly rises to a peak around T+400 sec
and slowly decreases to a minumum around T+1100 sec, then increases
to a second maximum around T+1650 sec, and then decreases again
with continuing emission past T+2100 sec (where the data stops).
The amplitudes of the two peaks are 0.09 +- 0.01 and 0.060 +- 0.006
ph/cm2/sec, resp.
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