GRB 050416A
GCN Circular 3369
Subject
GRB050416A : 1 GHz limit from GMRT
Date
2005-05-06T12:25:56Z (20 years ago)
From
Resmi L at Raman Res.Inst./India <resmi@rri.res.in>
C. H. Ishwara-Chandra (National Centre for Radio Astrophysics, Pune,
India), A. P. Kamble and L. Resmi (Raman Research Institute, Bangalore,
India) report on behalf of a larger GRB collaboration:
We observed the GRB050416A field (GCN 3268) on 25th April 2005 (UT 17:30
to 22:20) with the Giant Meterwave Radio Telescope at 1280MHz. We do not
detect any source within the 5" error circle of the Swift XRT. At the
position of the VLA source reported by Soderberg et. al. (GCN 3318) we
place a 2 sigma upper limit of 94 micro Jansky.
This message may be cited.
[GCN OPS NOTE; This circular was delayed 2 hrs until an account could be set up.]
GCN Circular 3318
Subject
GRB050416a: Radio Detection
Date
2005-04-22T19:15:34Z (21 years ago)
From
Alicia Soderberg at Caltech <ams@astro.caltech.edu>
A. M. Soderberg (Caltech) reports on behalf of
the Caltech-NRAO-Carnegie GRB Collaboration:
"We observed the field centered on the XRT position of the Swift burst
GRB 050416a (GCN#3268) using the VLA at a frequency of 4.86 GHz
on Apr 22.04 UT (t ~ 5.6 days after the burst).
We detect a radio source coincident with the optical afterglow
position reported by Cenko & Fox (GCN#3265). The flux density of
the source is 260 +- 55 uJy.
Further observations are planned"
GCN Circular 3290
Subject
GRB050416A, optical observations
Date
2005-04-18T19:25:11Z (21 years ago)
From
Adalberto Piccioni at Astronomy, Bologna U. <piccioni@ermione.bo.astro.it>
G. Greco, C. Bartolini, A. Guarnieri, A. Piccioni (Bologna University),
G.Pizzichini (IASF-CNR, sezione di Bologna), R. Poggiani (Pisa
University) and I. Bruni (Osservatorio di Bologna) report:
"We observed the field of GRB 050416A (Sakamoto et al., GCN 3264) using
the 1.52-cm G. D. Cassini telescope of Bologna University, equipped with
the BFOSC CCD imager.
We obtained 2x1200s images in Rc light on 2005 April 16.345 and 16.361 UT.
Due to the poor weather conditions, a seeing ~ 3", and the nearness of
the Moon, we evaluate the limiting magnitude of our co-added images
at ~ 19.6.
We did not detect the OT given by Bradley et al. (GCN 3265).
This message may be cited."