TY - JOUR
T1 - GRB 051022
T2 - Physical parameters and extinction of a prototype dark burst
AU - Rol, Evert
AU - Van Der Horst, Alexander
AU - Wiersema, Klaas
AU - Patel, Sandeep K.
AU - Levan, Andrew
AU - Nysewander, Melissa
AU - Kouveliotou, Chryssa
AU - Wijers, Ralph A.M.J.
AU - Tanvir, Nial
AU - Reichart, Dan
AU - Fruchter, Andrew S.
AU - Graham, John
AU - Ovaldsen, Jan Erik
AU - Jaunsen, Andreas O.
AU - Jonker, Peter
AU - Van Ham, Wilbert
AU - Hjorth, Jens
AU - Starling, Rhaana L.C.
AU - O'Brien, Paul T.
AU - Fynbo, Johan
AU - Burrows, David N.
AU - Strom, Richard
PY - 2007/11/10
Y1 - 2007/11/10
N2 - GRB 051022 was undetected to deep limits in early optical observations, but precise astrometry from radio and X-rays showed that it most likely originated in a galaxy at z ≈ 0.8. We report radio, optical, near-infrared, and X-ray observations of GRB 051022. Using the available X-ray and radio data, we model the afterglow and calculate its energetics, finding it to be an order of magnitude lower than that of the prompt emission. The broadband modeling also allows us to precisely define various other physical parameters and the minimum required amount of extinction to explain the absence of an optical afterglow. Our observations suggest a high extinction, at least 2.3 mag in the infrared (J) and at least 5.4 mag in the optical (U) in the host-galaxy rest frame. Such high extinctions are unusual for GRBs and likely indicate a geometry where our line of sight to the burst passes through a dusty region in the host that is not directly colocated with the burst itself.
AB - GRB 051022 was undetected to deep limits in early optical observations, but precise astrometry from radio and X-rays showed that it most likely originated in a galaxy at z ≈ 0.8. We report radio, optical, near-infrared, and X-ray observations of GRB 051022. Using the available X-ray and radio data, we model the afterglow and calculate its energetics, finding it to be an order of magnitude lower than that of the prompt emission. The broadband modeling also allows us to precisely define various other physical parameters and the minimum required amount of extinction to explain the absence of an optical afterglow. Our observations suggest a high extinction, at least 2.3 mag in the infrared (J) and at least 5.4 mag in the optical (U) in the host-galaxy rest frame. Such high extinctions are unusual for GRBs and likely indicate a geometry where our line of sight to the burst passes through a dusty region in the host that is not directly colocated with the burst itself.
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U2 - 10.1086/521336
DO - 10.1086/521336
M3 - Article
AN - SCOPUS:39049110088
SN - 0004-637X
VL - 669
SP - 1098
EP - 1106
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
ER -