[AAVSO-HEN] GRB 070328: pseudo-z~2.75 from spectral parameters of the prompt

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TITLE:   GCN CIRCULAR
NUMBER:  6231
SUBJECT: GRB 070328: pseudo-z~2.75 from spectral parameters of the prompt
DATE:    07/03/30 16:46:17 GMT
FROM:    Alexandre Pelangeon at LATT,OMP,Toulouse  <alexandre.pelangeon at ast.obs-mip.fr>

A. Pelangeon & J-L. Atteia (LATT-OMP) report:

We have used the spectral parameters obtained for the most intense part
of GRB 070328 -- from T0 to T-T0 ~22 sec, Konus time (V. Pal'shin, Ioffe 
Inst.,
private communication) -- observed by Konus-Wind (Golenetskii et al., 
GCNC 6230)
to compute the spectral pseudo-redshift** of this burst detected by 
SWIFT-BAT
(Markwardt et al., GCNC 6224; Stamatikos et al., GCNC 6225).

We find a pseudo-redshift pz= 2.75 +/- 0.95

We thank V. Pal'shin for having kindly performed the spectrum analysis
of the most intense part and providing us the spectral parameters.


** cf. http://www.ast.obs-mip.fr/grb/pz