Bibcode
                                    
                            Castro-Tirado, A. J.; Gorosabel, J.; Greiner, J.; Klose, S.; Mohan, V.; Sagar, R.; Bond, I.; Rattenbury, N.; Yock, Ph.; Vrba, F.; Henden, A.; Luginbuhl, C.; Guarnieri, A.; Zapatero-Osorio, M. R.; Zhu, J.; Hudec, R.; Guziy, S.; Shlyapnikov, A.; Palazzi, E.; Masetti, N.; Frontera, F.; Costa, E.; Feroci, M.; Piro, L.
    Referencia bibliográfica
                                    GAMMA-RAY BURSTS: 5th Huntsville Symposium. AIP Conference Proceedings, Volume 526, pp. 313-317 (2000).
Fecha de publicación:
    
                        9
            
                        2000
            
  Número de citas
                                    1
                            Número de citas referidas
                                    0
                            Descripción
                                    We present the results of optical/near-IR observations carried out in
the period Dec 1998-Dec 1999 at Spanish, Indian and New Zealand
observatories. Most of the searches proved to be unfruitful, in spite of
the rapid follow-up observations, starting 3-24 hr after the events.
This indicates that a significant fraction of the bursts occur in high
density environments preventing optical and near-IR photons to be
detected. In a couple of events, GRB 990123 and GRB 991208 the
optical/near-IR afterglows were detected. .