[AAVSO-HEN] GRB 081221: pseudo-redshift (pz=0.7) from the spectral parameters of the prompt emission

[grb at aavso.org]

The following is a GCN Circular circulated via the AAVSO network.
For an archive and more information on circulars visit:
http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html

TITLE:   GCN CIRCULAR
NUMBER:  8700
SUBJECT: GRB 081221: pseudo-redshift (pz=0.7) from the spectral parameters  of the prompt emission
DATE:    08/12/22 14:02:52 GMT
FROM:    Jean-Luc Atteia at Lab d Astrophys.,OMP,Toulouse  <atteia at ast.obs-mip.fr>

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

We have used the spectral parameters of GRB 081221 provided
by Golenetskii et al. (GCN Circ. 8694) to compute the spectral
pseudo-redshift** of this burst detected by Swift-BAT (Hoversten
et al. GCNC 8687).

We find a pseudo-redshift pz = 0.7 +/- 0.1

** http://cosmos.ast.obs-mip.fr/projet/index.html