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GCN Circular 9780

GRB 090812: WIRO NIR upper limit
2009-08-12T20:06:03Z (15 years ago)
Jay Norris at U. of Denver <>
Alexander Kutyrev (CRESST/UMCP/GSFC), Jay Norris (U. Denver),
report on behalf of the Goddard/U. Wyoming NIR camera collaboration.

We observed the afterglow position of GRB 090812 as reported by Cenko
(GCN Circ. 9769) with the 2.3-meter WIRO telescope and the Goddard
NIR camera, commencing 10:28 UT, 4.4 hrs after the Swift trigger
(Stamatikos et al., GCN Circ. 9768).

Using stacked J-band images with a total exposure time of 1360 s,
via comparison with two adjacent 2-MASS stars, we derive the following
3 sigma upper limit for the afterglow:

������ Tmid (UT)��� Mag

������� 10:46���� J-band > 21.2
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