GCN Circular 2040
Subject
GRB030329: Near Infrared Observations
Event
Date
2003-03-31T04:30:27Z (23 years ago)
From
Don Lamb at U.Chicago <lamb@oddjob.uchicago.edu>
D. Q. Lamb, D. York, J. Barentine, B. Ketzeback, J. Dembicky,
R. McMillan, M. Nysewander and D. Reichart report on behalf of the ARC
and UNC GRB teams of the FUN GRB collaboration:
J-, H-, and K-band photometry of the optical afterglow (Peterson and
Price, GCN 1985) of GRB030329 (Vanderspek et al., GCN 1997) were
obtained using the ARC 3.5-m telescope and the GRIM II at APO, starting
at 4.712 UT and ending at 5.651 UT on March 30. The measured J-band
magnitudes of the afterglow are given below:
------------------------
UT J
------------------------
4.712 14.230 +/- 0.047
4.961 14.307 +/- 0.077
5.425 14.596 +/- 0.119
5.570 14.501 +/- 0.075
------------------------
Assuming a model F(nu) ~ F_0 (nu/nu_0)^alpha, the spectral slope of the
flux from the J-band through the K-band at the time of the first cycle
of observations is alpha = - 0.8 +/- 0.1.