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Complicated variations in the early optical afterglow of GRB 090726
- 1.0355210 - ASÚ 2011 RIV FR eng J - Journal Article
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
R&D Projects: GA ČR GA205/08/1207
Grant - others:GA ČR(CZ) GA102/09/0997; ESA(XE) ESA-PECS project No. 98058
Institutional research plan: CEZ:AV0Z10030501
Keywords : gamma-ray burst * radiation mechanisms * plasmas
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics
Impact factor: 4.410, year: 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.
Permanent Link: http://hdl.handle.net/11104/0194034
Number of the records: 1