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GRB 050117: Simultaneous Gamma-ray and X-ray Observations with the Swift Satellite
Astrophysics · Submitted 30 Sep 2005
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim This is found to be consistent with the gamma-ray decay when extrapolated into the XRT energy band.
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The abstract, sentence by sentence
The Swift Gamma-Ray Burst Explorer performed its first autonomous, X-ray follow-up to a newly detected GRB on 2005 January 17, within 193 seconds of the burst trigger by the Swift Burst Alert Telescope. While the burst was still in progress, the X-ray Telescope obtained a position and an image for an un-catalogued X-ray source; simultaneous with the gamma-ray observation. The XRT observed flux during the prompt emission was 1.1 x 10^{-8} ergs cm^{-2} s^{-1} in the 0.5-10 keV energy band. The emission in the X-ray band decreased by three orders of magnitude within 700 seconds, following the prompt emission. This is found to be consistent with the gamma-ray decay when extrapolated into the XRT energy band. During the following 6.3 hours, the XRT observed the afterglow in an automated sequence for an additional 947 seconds, until the burst became fully obscured by the Earth limb. A faint, extremely slowly decaying afterglow, alpha=-0.21$, was detected. Finally, a break in the lightcurve occurred and the flux decayed with alpha<-1.2$. The X-ray position triggered many follow-up observations: no optical afterglow could be confirmed, although a candidate was identified 3 arcsecs from the XRT position.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | The Swift Gamma-Ray Burst Explorer performed its first autonomous, X-ray follow-up to a newly detected GRB on 2005 January 17, within 193 seconds of the burst trigger by the Swift Burst Alert Telescope. | contribution 0.83 | 0.87 | 0.11 | asserted 1.00 |
| s1 | While the burst was still in progress, the X-ray Telescope obtained a position and an image for an un-catalogued X-ray source; simultaneous with the gamma-ray observation. | method 0.36 | 0.91 | 0.08 | asserted 1.00 |
| s2 | The XRT observed flux during the prompt emission was 1.1 x 10^{-8} ergs cm^{-2} s^{-1} in the 0.5-10 keV energy band. | result 1.00 | 0.93 | 0.05 | asserted 1.00 |
| s3 | The emission in the X-ray band decreased by three orders of magnitude within 700 seconds, following the prompt emission. | result 1.00 | 0.89 | 0.09 | asserted 1.00 |
| s4 | This is found to be consistent with the gamma-ray decay when extrapolated into the XRT energy band. | interpretation 0.93 | 0.86 | 0.15 | hedged possibility 0.84 |
| s5 | During the following 6.3 hours, the XRT observed the afterglow in an automated sequence for an additional 947 seconds, until the burst became fully obscured by the Earth limb. | method 0.62 | 0.94 | 0.05 | asserted 1.00 |
| s6 | A faint, extremely slowly decaying afterglow, alpha=-0.21$, was detected. | result 1.00 | 0.92 | 0.13 | asserted 1.00 |
| s7 | Finally, a break in the lightcurve occurred and the flux decayed with alpha<-1.2$. | result 1.00 | 0.90 | 0.12 | asserted 1.00 |
| s8 | The X-ray position triggered many follow-up observations: no optical afterglow could be confirmed, although a candidate was identified 3 arcsecs from the XRT position. | result 0.96 | 0.71 | 0.08 | asserted 0.68 |
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The paper
Original abstract
The Swift Gamma-Ray Burst Explorer performed its first autonomous, X-ray follow-up to a newly detected GRB on 2005 January 17, within 193 seconds of the burst trigger by the Swift Burst Alert Telescope. While the burst was still in progress, the X-ray Telescope obtained a position and an image for an un-catalogued X-ray source; simultaneous with the gamma-ray observation. The XRT observed flux during the prompt emission was 1.1 x 10^{-8} ergs cm^{-2} s^{-1} in the 0.5-10 keV energy band. The emission in the X-ray band decreased by three orders of magnitude within 700 seconds, following the prompt emission. This is found to be consistent with the gamma-ray decay when extrapolated into the XRT energy band. During the following 6.3 hours, the XRT observed the afterglow in an automated sequence for an additional 947 seconds, until the burst became fully obscured by the Earth limb. A faint, extremely slowly decaying afterglow, alpha=-0.21$, was detected. Finally, a break in the lightcurve occurred and the flux decayed with alpha<-1.2$. The X-ray position triggered many follow-up observations: no optical afterglow could be confirmed, although a candidate was identified 3 arcsecs from the XRT position.
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