TITLE:   GCN CIRCULAR
NUMBER:  15707
SUBJECT: GRB 140108A: theoretical prediction of redshift and of supernova occurrence
DATE:    14/01/09 11:47:54 GMT
FROM:    Remo Rufinni at ICRA  <ruffini@icra.it>

R. Ruffini, C.L. Bianco, M. Enderli, M. Kovacevic, M. Muccino, A.V.
Penacchioni, G.B. Pisani, J.A. Rueda, Y. Wang report:

The late Swift/XRT observations of GRB 140108A (1,2) evidences the
fullfillment of the IGC paradigm (3,4). A preliminary overlapping of
its X-ray (0.3-10 keV in rest-frame) luminosity with the one of GRB
090618, namely an IGC prototype (5), gives an estimate of the redshift
of z=0.6 (+/- 0.1) (see Fig. 1
<http://www.icranet.org/images/GCN/GRB140108A.pdf>).

As a consequence, a supernova associated to GRB 140108A is expected to
emerge after 16 (+/- 3) days after the trigger.

Given the spectral parameters of the prompt emission by Swift/BAT
(<http://gcn.gsfc.nasa.gov/notices_s/583338/BA/>), this redshift
estimation leads to an isotropic energy of E_iso ~ 4x10^52 erg.

Continuous monitoring and complementary observations in all possible
wavelengths are encouraged.

References:
(1) Racusin et al., GCN 15699
(2) D'Avanzo et al., GCN 15706
(3) Rueda & R. Ruffini, ApJLett, 758, L7 (2012)
(4) Pisani et al., A&A, 552, L5 (2013)
(5) Izzo et al., A&A, 548, L5 (2012)