GRB 050117A
GCN Circular 2962
Subject
GRB050117a: Refined analysis
Date
2005-01-18T23:38:44Z (20 years ago)
From
Scott Barthelmy at NASA/GSFC <Scott@lheamail.gsfc.nasa.gov>
S. Barthelmy, L. Barbier (GSFC), J. Cummings (GSFC), E. Fenimore (LANL),
N. Gehrels (GSFC), D. Hullinger (GSFC/UMD), H. Krimm (GSFC/USRA),
C. Markwardt (GSFC/UMD), K. McLean (LANL), D. Palmer (LANL), A. Parsons (GSFC),
T. Sakamoto (GSFC), G. Sato (ISAS), P. Schady (MSSL), M. Suzuki (Saitama),
J. Tueller (GSFC) on behalf of the Swift-BAT team:
Further analysis of Swift-BAT GRB050117a (Sakamoto et al., GCN Circ 2952)
yields the fluence to be 7x10^-6 erg/cm2 in the 15-350 keV band and a
peak flux of 0.88 +/- 0.06 ph/cm2/sec (also 15-350 keV) in a 5-sec wide
window bracketing the highest peak (starting at T+85 sec) in the multi-peak
lightcurve. We note that the ~200-sec duration quoted in Circ 2952
was an eye-ball fit for the the total duration. The proper T90 time
is 169 sec (15-350 keV).
GCN Circular 2963
Subject
GRB050117a: Radio Observations
Date
2005-01-19T02:43:21Z (20 years ago)
From
Dale A. Frail at NRAO <dfrail@nrao.edu>
Dale A. Frail reports on behalf of a larger collaboration:
"On January 19.08 UT the VLA was used to observe a region toward the
refined XRT position (GCN#2955) of the Swift burst, GRB 050117A (GCN
#2952 and 2962). At a frequency of 8.46 GHz no emission was detected
above a 4-sigma level of 130 microJy within the 30-arcsec diameter
error circle."
GCN Circular 2980
Subject
GRB 050117a: Radio Observations
Date
2005-01-25T21:12:48Z (20 years ago)
From
Alicia Soderberg at Caltech <ams@astro.caltech.edu>
A. M. Soderberg (Caltech) and D. A. Frail (NRAO) report on behalf of a
larger collaboration:
"On 2005 January 24.14 UT we carried out follow-up observations with the
VLA centered on the refined XRT position (GCN#2955) of the Swift burst,
GRB 050117A (GCN #2952 and 2962). At a frequency of 8.46 GHz no emission
was detected above a 2-sigma level of 56 microJy within the 30-arcsec
(diameter) error circle.
No further observations are planned."