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Presentations at

Holding conferences:
GRB mini-workshop 2006
GRB workshop 2009

Report at the SAO's astrophysical seminar on April, 13, 2006

T.A.Fatkhullin and V.V.Sokolov

Gamma-ray bursts and supernovae: new facts, new models

A review of new observational data confirming a direct relation between cosmic gamma-ray bursts and massive supernovae.

About the gamma-ray burst GRB 060218/SN 2006aj (z=0.033): the most recent observational results and about inevitable changes in "standard"/popular scenarios describing the phenomenon of the gamma-ray burst and explosion of a (massive) supernova.

The observational results were obtained under a joint porgram of Instituto de Astrofisica de Andalucia (Alberto J. Castro-Tirado, IAA-CSIC, Spain) and SAO RAS

The very first spectra of OT GRB 060218

(z = 0.0331)

Telescope T(first_Sp) astro-ph/
MDM (2.4m) 1.95 days 0603686 (Mirabal et al.)
BTA (6m) 2.55 days GCN GRB Report No 4809
ESO VLT (8m) 2.89 days 0603530 (Pian et al.)
NOT (2.56m) 3.78 days 0603495* (Sollerman et al.)
MMT (6.5m) 3.97 days 0603377 (Modjaz et al.)
... ... ...

T(first_Sp) - time after the GRB 060218

0603495* - Sollerman et al., directly in Abstract: "Our first spectra are earlier than spectra for any other GRB-SN."

But Jesper Sollerman is mistaken a lot because

The BTA spectra of GRB 060218/SN 2006aj, as well as the BTA spectra of GRB 030329/SN 2003dh (z = 0.1685), turn out again to be among the very first spectra of two nearest GRB/SN-bursts. UV-excesses in early spectra mean an interaction between the shock wave and the stellar wind of a massive star (the SN Ic shock break-out)

The BTA first spectra of OT GRB 060218

The BTA first spectra

BTA & Zeiss GRB 030329

BTA & Zeiss GRB 030329

A model of an asymmetric explosion of the GRB/SN progenitor

…a strongly non-spherical explosion may be a generic feature of core-collapse supernovae of all types.

…Though while it is not clear that the same mechanism that generates the GRB is also responsible for exploding the star.

astro-ph/0603297, Leonard, Filippenko et al.


Fig. from Astro-ph/0604131, Woosley and Heger

Though the phenomenon itself is unusual, but the object-source is not unique!

The closer a GRB-source is, the more are the signs of a supernova.

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Last update: 15.02.2014