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 3726

GRB 050801: ROTSE-III Early Afterglow Break
2005-08-01T19:50:15Z (19 years ago)
Eli Rykoff at U of Michigan/ROTSE <>
E.S. Rykoff (U Mich), S.A. Yost (U Mich), W. Rujopakarn (U Mich), H. 
Swan (U Mich), K. Alatalo (Berkeley), R. Quimby (U Texas) report on 
behalf of the ROTSE collaboration:

ROTSE-IIIc, located at the H.E.S.S. site at Mt. Gamsberg, Namibia, is 
observing the optical counterpart to GRB 050801 (Swift trigger 148522, 
Band et al, GCN 3725).  The early afterglow reported in GCN 3723 is 
characterized by a broken power-law, which does not decay significantly 
from t+21s to t+200s, followed by a decline with a power law index of 
~-1.1.  Our preliminary photometry, relative to the USNO A2.0 catalog, 
also shows some possible sub-structure to the lightcurve.

tstart-tburst  exptime        mag
  21.8          5.0        14.99+/-0.06
  203.0         20.0       15.01+/-0.03
  1590.3        60.0       17.29+/-0.15
Looking for U.S. government information and services? Visit