GCN Circular 11666

Subject

GRB 110205A - Continued PAIRITEL NIR Observations

Event

Date

2011-02-07T22:24:21Z (15 years ago)

From

Adam Morgan at U.C. Berkeley <qmorgan@gmail.com>

A. N. Morgan and J. S. Bloom (UC Berkeley) report:

We continued to observe the location of the NIR afterglow of GRB
110205A (Morgan et al. GCN 11636Loading...
 
 ) with the 1.3m PAIRITEL located at
Mt. Hopkins, Arizona throughout the night of February 5th and again on
2011-02-06.  The afterglow continued to be well detected throughout
the first night.

The preliminary photometry yields:

post burst
t_mid (hr) exp.(hr) filt  mag    m_err
4.63       0.64     J     17.01  0.05
4.63       0.64     H     16.26  0.06
4.63       0.64     Ks    15.43  0.07

5.63       0.64     J     17.23  0.06
5.63       0.64     H     16.37  0.07
5.63       0.64     Ks    15.71  0.09

6.63       0.64     J     17.46  0.07
6.63       0.64     H     16.71  0.09
6.63       0.64     Ks    16.0   0.1

7.64       0.64     J     17.9   0.1
7.64       0.64     H     17.0   0.1
7.64       0.64     Ks    16.3   0.2

8.64       0.64     J     17.8   0.1
8.64       0.64     H     17.3   0.2
8.64       0.64     Ks    16.3   0.2

9.64       0.64     J     18.2   0.2
9.64       0.64     H     17.5   0.3
9.64       0.64     Ks    16.8   0.3

10.6       0.64     J     18.4   0.2
10.6       0.64     H     17.6   0.3
10.6       0.64     Ks    16.7   0.3

30.7       4.45     J     >20.1  3sig
30.7       4.45     H     >19.0  3sig
30.7       4.45     Ks    >18.3  3sig

The late time decay index is consistent with that seen in the optical
(Urata et al. GCN 11648Loading...
 
 ).  All magnitudes are given in the Vega
system, calibrated to 2MASS. No correction for Galactic extinction has
been made to the above reported values.