GRB 050223

A faint gamma-ray burst discovered by Swift

K. L. Page, E. Rol, A. J. Levan, B. Zhang, J. P. Osborne, P. T. O'Brien, A. P. Beardmore, David Nelson Burrows, S. Campana, G. Chincharini, J. R. Cummings, G. Cusumano, N. Gehrels, P. Giommi, M. R. Goad, O. Godet, V. Mangano, G. Tagliaferri, A. A. Wells

Research output: Contribution to journalLetter

7 Citations (Scopus)

Abstract

GRB 050223 was discovered by the Swift Gamma-Ray Burst Explorer on 2005 February 23 and was the first gamma-ray burst (GRB) to be observed by both Swift and XMM-Newton. At the time of writing (2005 May), it has one of the faintest GRB afterglows ever observed. The spacecraft could not slew immediately to the burst, so the first X-ray and optical observations occurred approximately 45 min after the trigger. Although no optical emission was found by any instrument, both Swift and XMM-Newton detected the fading X-ray afterglow. Combined data from both of these observatories show the afterglow to be fading monotonically as 0.99+0.15 -0.12 over a time-frame between 45 min and 27 h post-burst. Spectral analysis, allowed largely by the higher throughput of XMM-Newton, implies a power law with a slope of Γ = 1.75+0.19 -0.18and shows no evidence for absorption above the Galactic column of 7 × 1020 cm-2. From the X-ray decay and spectral slopes, a low electron power-law index of p = 1.3-1.9 is derived; the slopes also imply that a jet-break has not occurred up to 27 h after the burst. The faintness of GRB 050223 may be due to a large jet opening or viewing angle or a high redshift.

Original languageEnglish (US)
JournalMonthly Notices of the Royal Astronomical Society: Letters
Volume363
Issue number1
DOIs
StatePublished - Oct 1 2005

Fingerprint

gamma ray bursts
XMM-Newton telescope
afterglows
newton
power law
bursts
fading
slopes
spectral analysis
spacecraft
observatory
x rays
electron
spectrum analysis
light emission
observatories
actuators
decay
electrons

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Page, K. L., Rol, E., Levan, A. J., Zhang, B., Osborne, J. P., O'Brien, P. T., ... Wells, A. A. (2005). GRB 050223: A faint gamma-ray burst discovered by Swift. Monthly Notices of the Royal Astronomical Society: Letters, 363(1). https://doi.org/10.1111/j.1745-3933.2005.00086.x
Page, K. L. ; Rol, E. ; Levan, A. J. ; Zhang, B. ; Osborne, J. P. ; O'Brien, P. T. ; Beardmore, A. P. ; Burrows, David Nelson ; Campana, S. ; Chincharini, G. ; Cummings, J. R. ; Cusumano, G. ; Gehrels, N. ; Giommi, P. ; Goad, M. R. ; Godet, O. ; Mangano, V. ; Tagliaferri, G. ; Wells, A. A. / GRB 050223 : A faint gamma-ray burst discovered by Swift. In: Monthly Notices of the Royal Astronomical Society: Letters. 2005 ; Vol. 363, No. 1.
@article{f863c80750794727a4f5d49ba3e85b82,
title = "GRB 050223: A faint gamma-ray burst discovered by Swift",
abstract = "GRB 050223 was discovered by the Swift Gamma-Ray Burst Explorer on 2005 February 23 and was the first gamma-ray burst (GRB) to be observed by both Swift and XMM-Newton. At the time of writing (2005 May), it has one of the faintest GRB afterglows ever observed. The spacecraft could not slew immediately to the burst, so the first X-ray and optical observations occurred approximately 45 min after the trigger. Although no optical emission was found by any instrument, both Swift and XMM-Newton detected the fading X-ray afterglow. Combined data from both of these observatories show the afterglow to be fading monotonically as 0.99+0.15 -0.12 over a time-frame between 45 min and 27 h post-burst. Spectral analysis, allowed largely by the higher throughput of XMM-Newton, implies a power law with a slope of Γ = 1.75+0.19 -0.18and shows no evidence for absorption above the Galactic column of 7 × 1020 cm-2. From the X-ray decay and spectral slopes, a low electron power-law index of p = 1.3-1.9 is derived; the slopes also imply that a jet-break has not occurred up to 27 h after the burst. The faintness of GRB 050223 may be due to a large jet opening or viewing angle or a high redshift.",
author = "Page, {K. L.} and E. Rol and Levan, {A. J.} and B. Zhang and Osborne, {J. P.} and O'Brien, {P. T.} and Beardmore, {A. P.} and Burrows, {David Nelson} and S. Campana and G. Chincharini and Cummings, {J. R.} and G. Cusumano and N. Gehrels and P. Giommi and Goad, {M. R.} and O. Godet and V. Mangano and G. Tagliaferri and Wells, {A. A.}",
year = "2005",
month = "10",
day = "1",
doi = "10.1111/j.1745-3933.2005.00086.x",
language = "English (US)",
volume = "363",
journal = "Monthly Notices of the Royal Astronomical Society: Letters",
issn = "1745-3925",
publisher = "Oxford University Press",
number = "1",

}

Page, KL, Rol, E, Levan, AJ, Zhang, B, Osborne, JP, O'Brien, PT, Beardmore, AP, Burrows, DN, Campana, S, Chincharini, G, Cummings, JR, Cusumano, G, Gehrels, N, Giommi, P, Goad, MR, Godet, O, Mangano, V, Tagliaferri, G & Wells, AA 2005, 'GRB 050223: A faint gamma-ray burst discovered by Swift', Monthly Notices of the Royal Astronomical Society: Letters, vol. 363, no. 1. https://doi.org/10.1111/j.1745-3933.2005.00086.x

GRB 050223 : A faint gamma-ray burst discovered by Swift. / Page, K. L.; Rol, E.; Levan, A. J.; Zhang, B.; Osborne, J. P.; O'Brien, P. T.; Beardmore, A. P.; Burrows, David Nelson; Campana, S.; Chincharini, G.; Cummings, J. R.; Cusumano, G.; Gehrels, N.; Giommi, P.; Goad, M. R.; Godet, O.; Mangano, V.; Tagliaferri, G.; Wells, A. A.

In: Monthly Notices of the Royal Astronomical Society: Letters, Vol. 363, No. 1, 01.10.2005.

Research output: Contribution to journalLetter

TY - JOUR

T1 - GRB 050223

T2 - A faint gamma-ray burst discovered by Swift

AU - Page, K. L.

AU - Rol, E.

AU - Levan, A. J.

AU - Zhang, B.

AU - Osborne, J. P.

AU - O'Brien, P. T.

AU - Beardmore, A. P.

AU - Burrows, David Nelson

AU - Campana, S.

AU - Chincharini, G.

AU - Cummings, J. R.

AU - Cusumano, G.

AU - Gehrels, N.

AU - Giommi, P.

AU - Goad, M. R.

AU - Godet, O.

AU - Mangano, V.

AU - Tagliaferri, G.

AU - Wells, A. A.

PY - 2005/10/1

Y1 - 2005/10/1

N2 - GRB 050223 was discovered by the Swift Gamma-Ray Burst Explorer on 2005 February 23 and was the first gamma-ray burst (GRB) to be observed by both Swift and XMM-Newton. At the time of writing (2005 May), it has one of the faintest GRB afterglows ever observed. The spacecraft could not slew immediately to the burst, so the first X-ray and optical observations occurred approximately 45 min after the trigger. Although no optical emission was found by any instrument, both Swift and XMM-Newton detected the fading X-ray afterglow. Combined data from both of these observatories show the afterglow to be fading monotonically as 0.99+0.15 -0.12 over a time-frame between 45 min and 27 h post-burst. Spectral analysis, allowed largely by the higher throughput of XMM-Newton, implies a power law with a slope of Γ = 1.75+0.19 -0.18and shows no evidence for absorption above the Galactic column of 7 × 1020 cm-2. From the X-ray decay and spectral slopes, a low electron power-law index of p = 1.3-1.9 is derived; the slopes also imply that a jet-break has not occurred up to 27 h after the burst. The faintness of GRB 050223 may be due to a large jet opening or viewing angle or a high redshift.

AB - GRB 050223 was discovered by the Swift Gamma-Ray Burst Explorer on 2005 February 23 and was the first gamma-ray burst (GRB) to be observed by both Swift and XMM-Newton. At the time of writing (2005 May), it has one of the faintest GRB afterglows ever observed. The spacecraft could not slew immediately to the burst, so the first X-ray and optical observations occurred approximately 45 min after the trigger. Although no optical emission was found by any instrument, both Swift and XMM-Newton detected the fading X-ray afterglow. Combined data from both of these observatories show the afterglow to be fading monotonically as 0.99+0.15 -0.12 over a time-frame between 45 min and 27 h post-burst. Spectral analysis, allowed largely by the higher throughput of XMM-Newton, implies a power law with a slope of Γ = 1.75+0.19 -0.18and shows no evidence for absorption above the Galactic column of 7 × 1020 cm-2. From the X-ray decay and spectral slopes, a low electron power-law index of p = 1.3-1.9 is derived; the slopes also imply that a jet-break has not occurred up to 27 h after the burst. The faintness of GRB 050223 may be due to a large jet opening or viewing angle or a high redshift.

UR - http://www.scopus.com/inward/record.url?scp=33745617618&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33745617618&partnerID=8YFLogxK

U2 - 10.1111/j.1745-3933.2005.00086.x

DO - 10.1111/j.1745-3933.2005.00086.x

M3 - Letter

VL - 363

JO - Monthly Notices of the Royal Astronomical Society: Letters

JF - Monthly Notices of the Royal Astronomical Society: Letters

SN - 1745-3925

IS - 1

ER -