Swift Panchromatic Observations of the Bright Gamma-Ray Burst GRB 050525a

A.~J. Blustin; D. Band; S. Barthelmy; P. Boyd; M. Capalbi; S.~T. Holland; F.~E. Marshall; K.~O. Mason; M. Perri; T. Poole; P. Roming; S. Rosen; P. Schady; M. Still; B. Zhang; L. Angelini; L. Barbier; A. Beardmore; A. Breeveld; D.~N. Burrows; J.~R. Cummings; J. Cannizzo; S. Campana; M.~M. Chester; G. Chincarini; L.~R. Cominsky; A. Cucchiara; M. de Pasquale; E.~E. Fenimore; N. Gehrels; P. Giommi; M. Goad; C. Gronwall; D. Grupe; J.~E. Hill; D. Hinshaw; S. Hunsberger; K.~C. Hurley; M. Ivanushkina; J.~A. Kennea; H.~A. Krimm; P. Kumar; W. Landsman; V. La Parola; C.~B. Markwardt; K. McGowan; P. Mészáros; T. Mineo; A. Moretti; A. Morgan; J. Nousek; P.~T. O'Brien; J.~P. Osborne; K. Page; M.~J. Page; D.~M. Palmer; A.~M. Parsons; J. Rhoads; P. Romano; T. Sakamoto; G. Sato; G. Tagliaferri; J. Tueller; A.~A. Wells; N.~E. White

doi:10.1086/498425

Swift Panchromatic Observations of the Bright Gamma-Ray Burst GRB 050525a

A.~J. Blustin, D. Band, S. Barthelmy, P. Boyd, M. Capalbi, S.~T. Holland, F.~E. Marshall, K.~O. Mason, M. Perri, T. Poole, P. Roming, S. Rosen, P. Schady, M. Still, B. Zhang, L. Angelini, L. Barbier, A. Beardmore, A. Breeveld, D.~N. BurrowsJ.~R. Cummings, J. Cannizzo, S. Campana, M.~M. Chester, G. Chincarini, L.~R. Cominsky, A. Cucchiara, M. de Pasquale, E.~E. Fenimore, N. Gehrels, P. Giommi, M. Goad, C. Gronwall, D. Grupe, J.~E. Hill, D. Hinshaw, S. Hunsberger, K.~C. Hurley, M. Ivanushkina, J.~A. Kennea, H.~A. Krimm, P. Kumar, W. Landsman, V. La Parola, C.~B. Markwardt, K. McGowan, P. Mészáros, T. Mineo, A. Moretti, A. Morgan, J. Nousek, P.~T. O'Brien, J.~P. Osborne, K. Page, M.~J. Page, D.~M. Palmer, A.~M. Parsons, J. Rhoads, P. Romano, T. Sakamoto, G. Sato, G. Tagliaferri, J. Tueller, A.~A. Wells, N.~E. White

Department of Physics

Research output: Contribution to journal › Article › peer-review

104 Citations (SciVal)

Abstract

The bright gamma-ray burst GRB 050525a has been detected with the Swift observatory, providing unique multiwavelength coverage from the very earliest phases of the burst. The X-ray and optical/UV afterglow decay light curves both exhibit a steeper slope ~0.15 days after the burst, indicative of a jet break. This jet break time combined with the total gamma-ray energy of the burst constrains the opening angle of the jet to be 3fdg2. We derive an empirical "time-lag" redshift from the BAT data of img1.gif = 0.69 ± 0.02, in good agreement with the spectroscopic redshift of 0.61. Prior to the jet break, the X-ray data can be modeled by a simple power law with index α = -1.2. However, after 300 s the X-ray flux brightens by about 30% compared to the power-law fit. The optical/UV data have a more complex decay, with evidence of a rapidly falling reverse shock component that dominates in the first minute or so, giving way to a flatter forward shock component at later times. The multiwavelength X-ray/UV/optical spectrum of the afterglow shows evidence for migration of the electron cooling frequency through the optical range within 25,000 s. The measured temporal decay and spectral indexes in the X-ray and optical/UV regimes compare favorably with the standard fireball model for gamma-ray bursts assuming expansion into a constant-density interstellar medium.

Original language	English
Pages (from-to)	901-913
Number of pages	13
Journal	Astrophysical Journal
Volume	637
Issue number	2
DOIs	https://doi.org/10.1086/498425
Publication status	Published - 1 Feb 2006

Keywords

Astrometry, Galaxies: Distances and Redshifts, Gamma Rays: Bursts, Shock Waves, X-rays: individual (GRB 050525a), Astrophysics

Access to Document

10.1086/498425

Cite this

Blustin, A. J., Band, D., Barthelmy, S., Boyd, P., Capalbi, M., Holland, S. T., Marshall, F. E., Mason, K. O., Perri, M., Poole, T., Roming, P., Rosen, S., Schady, P., Still, M., Zhang, B., Angelini, L., Barbier, L., Beardmore, A., Breeveld, A., ... White, N. E. (2006). Swift Panchromatic Observations of the Bright Gamma-Ray Burst GRB 050525a. Astrophysical Journal, 637(2), 901-913. https://doi.org/10.1086/498425

Blustin, AJ, Band, D, Barthelmy, S, Boyd, P, Capalbi, M, Holland, ST, Marshall, FE, Mason, KO, Perri, M, Poole, T, Roming, P, Rosen, S, Schady, P, Still, M, Zhang, B, Angelini, L, Barbier, L, Beardmore, A, Breeveld, A, Burrows, DN, Cummings, JR, Cannizzo, J, Campana, S, Chester, MM, Chincarini, G, Cominsky, LR, Cucchiara, A, de Pasquale, M, Fenimore, EE, Gehrels, N, Giommi, P, Goad, M, Gronwall, C, Grupe, D, Hill, JE, Hinshaw, D, Hunsberger, S, Hurley, KC, Ivanushkina, M, Kennea, JA, Krimm, HA, Kumar, P, Landsman, W, La Parola, V, Markwardt, CB, McGowan, K, Mészáros, P, Mineo, T, Moretti, A, Morgan, A, Nousek, J, O'Brien, PT, Osborne, JP, Page, K, Page, MJ, Palmer, DM, Parsons, AM, Rhoads, J, Romano, P, Sakamoto, T, Sato, G, Tagliaferri, G, Tueller, J, Wells, AA & White, NE 2006, 'Swift Panchromatic Observations of the Bright Gamma-Ray Burst GRB 050525a', Astrophysical Journal, vol. 637, no. 2, pp. 901-913. https://doi.org/10.1086/498425

@article{eafbc74ddb234085a2c460bd7ca562a1,

title = "Swift Panchromatic Observations of the Bright Gamma-Ray Burst GRB 050525a",

abstract = "The bright gamma-ray burst GRB 050525a has been detected with the Swift observatory, providing unique multiwavelength coverage from the very earliest phases of the burst. The X-ray and optical/UV afterglow decay light curves both exhibit a steeper slope ~0.15 days after the burst, indicative of a jet break. This jet break time combined with the total gamma-ray energy of the burst constrains the opening angle of the jet to be 3fdg2. We derive an empirical {"}time-lag{"} redshift from the BAT data of img1.gif = 0.69 ± 0.02, in good agreement with the spectroscopic redshift of 0.61. Prior to the jet break, the X-ray data can be modeled by a simple power law with index α = -1.2. However, after 300 s the X-ray flux brightens by about 30% compared to the power-law fit. The optical/UV data have a more complex decay, with evidence of a rapidly falling reverse shock component that dominates in the first minute or so, giving way to a flatter forward shock component at later times. The multiwavelength X-ray/UV/optical spectrum of the afterglow shows evidence for migration of the electron cooling frequency through the optical range within 25,000 s. The measured temporal decay and spectral indexes in the X-ray and optical/UV regimes compare favorably with the standard fireball model for gamma-ray bursts assuming expansion into a constant-density interstellar medium.",

keywords = "Astrometry, Galaxies: Distances and Redshifts, Gamma Rays: Bursts, Shock Waves, X-rays: individual (GRB 050525a), Astrophysics",

author = "A.~J. Blustin and D. Band and S. Barthelmy and P. Boyd and M. Capalbi and S.~T. Holland and F.~E. Marshall and K.~O. Mason and M. Perri and T. Poole and P. Roming and S. Rosen and P. Schady and M. Still and B. Zhang and L. Angelini and L. Barbier and A. Beardmore and A. Breeveld and D.~N. Burrows and J.~R. Cummings and J. Cannizzo and S. Campana and M.~M. Chester and G. Chincarini and L.~R. Cominsky and A. Cucchiara and {de Pasquale}, M. and E.~E. Fenimore and N. Gehrels and P. Giommi and M. Goad and C. Gronwall and D. Grupe and J.~E. Hill and D. Hinshaw and S. Hunsberger and K.~C. Hurley and M. Ivanushkina and J.~A. Kennea and H.~A. Krimm and P. Kumar and W. Landsman and {La Parola}, V. and C.~B. Markwardt and K. McGowan and P. M{\'e}sz{\'a}ros and T. Mineo and A. Moretti and A. Morgan and J. Nousek and P.~T. O'Brien and J.~P. Osborne and K. Page and M.~J. Page and D.~M. Palmer and A.~M. Parsons and J. Rhoads and P. Romano and T. Sakamoto and G. Sato and G. Tagliaferri and J. Tueller and A.~A. Wells and N.~E. White",

year = "2006",

month = feb,

day = "1",

doi = "10.1086/498425",

language = "English",

volume = "637",

pages = "901--913",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing",

number = "2",

}

TY - JOUR

T1 - Swift Panchromatic Observations of the Bright Gamma-Ray Burst GRB 050525a

AU - Blustin, A.~J.

AU - Band, D.

AU - Barthelmy, S.

AU - Boyd, P.

AU - Capalbi, M.

AU - Holland, S.~T.

AU - Marshall, F.~E.

AU - Mason, K.~O.

AU - Perri, M.

AU - Poole, T.

AU - Roming, P.

AU - Rosen, S.

AU - Schady, P.

AU - Still, M.

AU - Zhang, B.

AU - Angelini, L.

AU - Barbier, L.

AU - Beardmore, A.

AU - Breeveld, A.

AU - Burrows, D.~N.

AU - Cummings, J.~R.

AU - Cannizzo, J.

AU - Campana, S.

AU - Chester, M.~M.

AU - Chincarini, G.

AU - Cominsky, L.~R.

AU - Cucchiara, A.

AU - de Pasquale, M.

AU - Fenimore, E.~E.

AU - Gehrels, N.

AU - Giommi, P.

AU - Goad, M.

AU - Gronwall, C.

AU - Grupe, D.

AU - Hill, J.~E.

AU - Hinshaw, D.

AU - Hunsberger, S.

AU - Hurley, K.~C.

AU - Ivanushkina, M.

AU - Kennea, J.~A.

AU - Krimm, H.~A.

AU - Kumar, P.

AU - Landsman, W.

AU - La Parola, V.

AU - Markwardt, C.~B.

AU - McGowan, K.

AU - Mészáros, P.

AU - Mineo, T.

AU - Moretti, A.

AU - Morgan, A.

AU - Nousek, J.

AU - O'Brien, P.~T.

AU - Osborne, J.~P.

AU - Page, K.

AU - Page, M.~J.

AU - Palmer, D.~M.

AU - Parsons, A.~M.

AU - Rhoads, J.

AU - Romano, P.

AU - Sakamoto, T.

AU - Sato, G.

AU - Tagliaferri, G.

AU - Tueller, J.

AU - Wells, A.~A.

AU - White, N.~E.

PY - 2006/2/1

Y1 - 2006/2/1

N2 - The bright gamma-ray burst GRB 050525a has been detected with the Swift observatory, providing unique multiwavelength coverage from the very earliest phases of the burst. The X-ray and optical/UV afterglow decay light curves both exhibit a steeper slope ~0.15 days after the burst, indicative of a jet break. This jet break time combined with the total gamma-ray energy of the burst constrains the opening angle of the jet to be 3fdg2. We derive an empirical "time-lag" redshift from the BAT data of img1.gif = 0.69 ± 0.02, in good agreement with the spectroscopic redshift of 0.61. Prior to the jet break, the X-ray data can be modeled by a simple power law with index α = -1.2. However, after 300 s the X-ray flux brightens by about 30% compared to the power-law fit. The optical/UV data have a more complex decay, with evidence of a rapidly falling reverse shock component that dominates in the first minute or so, giving way to a flatter forward shock component at later times. The multiwavelength X-ray/UV/optical spectrum of the afterglow shows evidence for migration of the electron cooling frequency through the optical range within 25,000 s. The measured temporal decay and spectral indexes in the X-ray and optical/UV regimes compare favorably with the standard fireball model for gamma-ray bursts assuming expansion into a constant-density interstellar medium.

AB - The bright gamma-ray burst GRB 050525a has been detected with the Swift observatory, providing unique multiwavelength coverage from the very earliest phases of the burst. The X-ray and optical/UV afterglow decay light curves both exhibit a steeper slope ~0.15 days after the burst, indicative of a jet break. This jet break time combined with the total gamma-ray energy of the burst constrains the opening angle of the jet to be 3fdg2. We derive an empirical "time-lag" redshift from the BAT data of img1.gif = 0.69 ± 0.02, in good agreement with the spectroscopic redshift of 0.61. Prior to the jet break, the X-ray data can be modeled by a simple power law with index α = -1.2. However, after 300 s the X-ray flux brightens by about 30% compared to the power-law fit. The optical/UV data have a more complex decay, with evidence of a rapidly falling reverse shock component that dominates in the first minute or so, giving way to a flatter forward shock component at later times. The multiwavelength X-ray/UV/optical spectrum of the afterglow shows evidence for migration of the electron cooling frequency through the optical range within 25,000 s. The measured temporal decay and spectral indexes in the X-ray and optical/UV regimes compare favorably with the standard fireball model for gamma-ray bursts assuming expansion into a constant-density interstellar medium.

KW - Astrometry, Galaxies: Distances and Redshifts, Gamma Rays: Bursts, Shock Waves, X-rays: individual (GRB 050525a), Astrophysics

U2 - 10.1086/498425

DO - 10.1086/498425

M3 - Article

SN - 0004-637X

VL - 637

SP - 901

EP - 913

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

Swift Panchromatic Observations of the Bright Gamma-Ray Burst GRB 050525a

Abstract

Keywords

Access to Document

Fingerprint

Cite this