[vsnet-grb-info 7693] GRB 090424 : Lulin 1m telescope optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  9247
SUBJECT: GRB 090424 : Lulin 1m telescope optical observations
DATE:    09/04/25 06:06:14 GMT
FROM:    Yuji Urata at Nat. Central U.  <urata at astro.ncu.edu.tw>

Y. Urata(NCU), K. Y. Huang (ASIAA) 
on behalf of EAFON report;

"We have observed optical afterglow of GRB090424 (Cannizzo et al., GCN
#9223, Yuan et al. GCN #9224; Xin et al. GCN #9225; Schady et
al. #9234; Gorosabel et al. GCN #9236; Urata et al. GCN #9240,
Olivares et al GCN #9245; Nissinen et al. GCN #9246) using Lulin 1m
telescope (LOT) with B, V, R, I and z'-band filters.  Observations
started at 14:34:18 UT on 24 April.  These LOT images show the
afterglow clearly. Based on our preliminary photometry compared with
USNO B1.0 stars, the R-band light curve between 1329 sec and 13303 sec
after the burst is well fitted by a simple power law with the decay
index 0.71."