[vsnet-grb-info 15450] GRB 140824A: NOT optical upper limits

GCN Circulars gcncirc at capella2.gsfc.nasa.gov
Mon Aug 25 07:58:36 JST 2014


TITLE:   GCN CIRCULAR
NUMBER:  16739
SUBJECT: GRB 140824A: NOT optical upper limits
DATE:    14/08/24 22:56:03 GMT
FROM:    Dong Xu at DARK/NBI  <dong.dark at gmail.com>

D. Xu (DARK/NBI), S. Covino (INAF-OAB), J. P. U. Fynbo (DARK/NBI), A.
A. Djupvik, J. Harmanen (NOT), P. Jakobsson (U. Iceland) report on
behalf of a larger collaboration:

We observed the field of GRB 140824A (Beardmore et al., GCN 16732)
using the 2.5m Nordic Optical Telescope (NOT) equipped with ALFOSC. We
obtained 3x300s SDSS r-band and 6x200s SDSS z-band images with their
median time of 12.41 hr and 12.88 hr after the burst, respectively.

No optical source is detected at the XRT position (Evans et al., GCN
16735), down to the upper limits of r~24.0 mag and z~22.4 mag.
Near-infrared follow-ups are encouraged.


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