Return to Home Page
TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2078 SUBJECT: GRB030329: multiple re-brightening phases DATE: 03/04/03 08:56:27 GMT FROM: Weidong Li at UC Berkeley KAIT/LOSS <weidong@astron.berkeley.edu> Weidong Li, Ryan Chornock, Saurabh Jha, and Alexei V. Filippenko (UC Berkeley) report: We collected the available R-band measurements of the GRB 030329 afterglow through GCN 2077 and a table is available at http://astron.berkeley.edu/~bait/grb/gcn030329.r.dat We found that the afterglow went through at least three re-brightening phases. A figure illustrating this can be found at http://astron.berkeley.edu/~bait/grb/grb030329.p3.ps The first re-brightening, as reported by Lipkin et al. (GCN 2045) and Burenin et al (GCN 2046), occurred at about 30 hours after the burst. The second re-brightening, as reported by Lipkin et al. (GCN 2060), occurred at about 60 hours after the burst. A third re-brightening occurred at about 80 hours after the burst. The afterglow appears to decline with a power law after each re-brightening. The following power-law indices are measured for the three dashed lines in our plot: t = 16 to 30 hours: alpha = -1.70 +/- 0.04 t = 40 to 60 hours: alpha = -1.63 +/- 0.07 t = 64 to 70 hours: alpha = -2.09 +/- 0.26 A preliminary analysis of the data reported in GCN Circulars suggests that the afterglow shows the same behavior in the other bands (BVI) as well, though the re-brightening episodes were less constrained than in the R band. This message may be cited.
Return to the Powerful Daisaku
vsnet-adm@kusastro.kyoto-u.ac.jp
