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D. Q. Lamb (U. Chicago), G. R. Ricker (MIT), J.-L. Atteia (Observatoire Midi-Pyrénées), N. Kawai (Tokyo Institute of Technology and RIKEN), HETE-2 Science Team
GRBs020124, 021112, 021211, and 030115 were quite faint at 18 hours after the burst. They would most likely have been classified as ``optically dark" GRBs were it not for the rapid HETE-2 localizations of these bursts, which allowed early optical follow-up observations that identified the optical and/or near IR afterglows of them. We discuss the implications of the HETE-2 observations of these bursts and the optical/near IR observations of their afterglows for the nature of ``optically dark" GRBs.
This work was supported in part by NASA Contract NASW-4690.
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Bulletin of the American Astronomical Society,
© 2003. The American Astronomical Soceity.