[vsnet-grb-info 1979] GRB 050814: continued fading

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3818
SUBJECT: GRB 050814: continued fading
DATE:    05/08/16 17:39:27 GMT
FROM:    Pall Jakobsson at Astronomisk Obs  <pallja at astro.ku.dk>

Páll Jakobsson, Johan P. U. Fynbo, Jens Hjorth, Brian L. Jensen,
José María Castro Cerón, Kristian Pedersen, Jesper Sollerman (DARK, NBI),
Kalle Torstensson, Karianne Holhjem (NOT, La Palma) and Jan-Erik Solheim
(U. of Oslo, Norway) report:

We have continued monitoring the field of GRB 050814.485 in the I band  
using
ALFOSC on the 2.56-meter Nordic Optical Telescope. Compared to our previous
epoch (Jensen et al. GCN#3809) the proposed afterglow appears to be fading.

By comparison with 5 standard stars in SA92 (Landolt, 1992, AJ, 104, 340)
we estimate the following magnitude for the afterglow:

Date (UT)   Filter  Exptime  Seeing  Mag
Aug 15.96   I       3x300s   0.8"    21.4

Using I = 20.5 from GCN#3809, the preliminary decay slope is alpha = 0.95.