Optical observations of GRB afterglows: GRB 970508 and GRB 980326 revisited

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Optical observations of GRB afterglows : GRB 970508 and GRB 980326 revisited ⋆ , ⋆ ⋆

Since January 1997, we have monitored 15 GRB fields, detecting 6 optical/IR afterglows. We have revisited GRB 970508 and GRB 980326. For GRB 970508, we derive a power-law decay exponent α =-1.19 (R-band). The luminosity of the host galaxy L relative to the characteristic luminosity L ⋆ is in the range 0.06–0.15, i.e. a dwarf galaxy. For GRB 980326, we derive a power-law decay exponent α =-1.7, ...

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ژورنال

عنوان ژورنال: Astronomy and Astrophysics Supplement Series

سال: 1999

ISSN: 0365-0138,1286-4846

DOI: 10.1051/aas:1999303