Complicated variations in the early optical afterglow of GRB 090726

0355210 - ASÚ 2011 RIV FR eng J - Článek v odborném periodiku
Šimon, Vojtěch - Polášek, Cyril - Jelínek, M. - Hudec, René - Štrobl, Jan
Complicated variations in the early optical afterglow of GRB 090726.
Astronomy & Astrophysics. Roč. 510, February (2010), A49/1-A49/5. ISSN 0004-6361. E-ISSN 1432-0746
Grant CEP: GA ČR GA205/08/1207
Grant ostatní: GA ČR(CZ) GA102/09/0997; ESA(XE) ESA-PECS project No. 98058
Výzkumný záměr: CEZ:AV0Z10030501
Klíčová slova: gamma-ray burst * radiation mechanisms * plasmas
Kód oboru RIV: BN - Astronomie a nebeská mechanika, astrofyzika
Impakt faktor: 4.410, rok: 2010

We studied the optical afterglow (OA) of the gamma-ray burst GRB 090726, which we observed by our robotic CCD telescope with the D 50 cm mirror. We explained the superimposed short flare by activity of the central engine. This OA is the representative of the least luminous ones and its initial Lorentz factor may even lie on the lower end of the range observed in GRBs. Neither the dust nor the gaseous component of the circumburst medium underwent any evolution during the decay of this OA.
Trvalý link: http://hdl.handle.net/11104/0194034