GCN Circular 3818
Subject
GRB 050814: continued fading
Date
2005-08-16T17:39:27Z (19 years ago)
Edited On
2024-11-07T19:51:11Z (2 months ago)
From
Pall Jakobsson at Niels Bohr Inst <pallja@astro.ku.dk>
Edited By
Vidushi Sharma at NASA GSFC/UMBC <vidushi.sharma@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>
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), Jan-Erik Solheim
(U. of Oslo, Norway), Sergio Sousa (CAUP and OAL, Portugal), and
Sarunas Mikolaitis (ITPA, Lithuania) 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.
[GCN OPS NOTE(16aug05): Per author's request, the institutional affiliation
was changed to Niels Bohr Inst; and the last two authors were added.]