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GCN Circular 11469

Subject
GRB 101219A: Magellan NIR observations
Date
2010-12-19T12:04:51Z (13 years ago)
From
Ryan Chornock at Harvard <rchornock@cfa.harvard.edu>
R. Chornock, W. Fong, E. Berger (Harvard), and E. Persson (Carnegie) report:

We observed the field of the short-hard burst GRB 101219A (Gelbord et 
al., GCN 11461) with FourStar on the 6.5-m Magellan Baade telescope. 
Observations in the J band began at 03:43:20 UT, 1.2 hours after the BAT 
trigger time.  The source in the XRT error circle found by Perley et al. 
(GCN 11464) is clearly detected in our images, at a preliminary 
magnitude of J=21.6 in comparison to 2MASS stars in the field.  The 
object is clearly extended in our images (seeing <0.5"), so it is likely 
the host galaxy and is not dominated by an afterglow, consistent with 
the non-detection of fading in the optical (Cenko et al., GCN 11468).
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