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GCN Circular 10843

GRB 100615A: PAIRITEL NIR Upper Limits
2010-06-15T05:41:52Z (14 years ago)
Adam Morgan at U.C. Berkeley <>
A. N. Morgan C. R. Klein, and J. S. Bloom (UC Berkeley) report:

We observed the field of GRB 100615A (D'Elia et al., GCN 10841) with
the 1.3m PAIRITEL located at Mt. Hopkins, Arizona. Observations began
at 2010-06-15 03h21m51 UT, ~1.4 hours after the Swift Trigger, under
high airmass (~2), and continued until the source set beyond telescope
limits.  In  mosaics (effective exposure time of 0.56 hours) taken
simultaneously in the J, H, and Ks filters, we do not detect any
source within the XRT error circle.

The preliminary photometry yields:

post burst
t_mid (hr) exp.(hr) filt  U. Limit (3 sig)
1.94      0.56     J     > 18.8
1.94      0.56     H     > 17.9
1.94      0.56     Ks    > 16.6

All magnitudes are given in the Vega system, calibrated to 2MASS. No
correction for Galactic extinction has been made to the above reported
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