Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 5549

GRB 060904B : CFHT/WIRCam NIR afterglow observations
2006-09-08T11:56:31Z (18 years ago)
Yuji Urata at Saitama U <>
K.Y. Huang, W.H. Ip, Y.S. Lee (NCU) and Y. Urata (Saitama Univ.)
on behalf of EAFON report:

"The NIR afterglow observations of GRB 060904B (Grup et al.; Rykoff et
al; Fugazza et al.) with CFHT/WICam started from 9.40 hours after the
GRB occurred. Our J and Ks images show the magnitude of the afterglow
are J~ 19 at 10.8 hours and Ks~ 17 at 9.4 hours (compare with 2MASS

  Refer to the SMART observations (Cobb et al., GCN 5515), our J band
result indicates the decay rate (Flux ~ t^alpha) may change form ~-
0.65 to ~ -1.37. However, we do not find the decay rate change from
our Ks band results.

We would like to thank CFHT/WIRCam staff, especially A. Loic and
P. Martin for their assistance.

This message may be cited."
Looking for U.S. government information and services? Visit