Swift observations of GRB 050128: The early X-ray afterglow

S. Campana; L. A. Antonelli; G. Chincarini; S. Covino; G. Cusumano; D. Malesani; V. Mangano; A. Moretti; C. Pagani; P. Romand; G. Tagliaferri; M. Capalbi; M. Perri; P. Giommi; L. Angelini; P. Boyd; D. N. Burrows; J. E. Hill; C. Gronwall; J. A. Kennea; S. Kobayashi; P. Kumar; P. Mészáros; J. A. Nousek; P. W.A. Roming; B. Zhang; A. F. Abbey; A. P. Beardmore; A. Breeveld; M. R. Goad; O. Godet; K. O. Mason; J. P. Osborne; K. L. Page; T. Poole; N. Gehrels

doi:10.1086/430883

Swift observations of GRB 050128: The early X-ray afterglow

S. Campana, L. A. Antonelli, G. Chincarini, S. Covino, G. Cusumano, D. Malesani, V. Mangano, A. Moretti, C. Pagani, P. Romand, G. Tagliaferri, M. Capalbi, M. Perri, P. Giommi, L. Angelini, P. Boyd, D. N. Burrows, J. E. Hill, C. Gronwall, J. A. KenneaS. Kobayashi, P. Kumar, P. Mészáros, J. A. Nousek, P. W.A. Roming, B. Zhang, A. F. Abbey, A. P. Beardmore, A. Breeveld, M. R. Goad, O. Godet, K. O. Mason, J. P. Osborne, K. L. Page, T. Poole, N. Gehrels

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Abstract

Swift discovered GRB 050128 with the Burst Alert Telescope and promptly pointed its narrow field instruments to monitor the afterglow. X-ray observations started 108 s after the trigger time. The early decay of the afterglow is relatively flat, with a temporal decay modeled with a power-law index of ∼-0.3. A steepening occurs at later times (∼1500 s) with a power-law index of ∼-1.3. During this transition, the observed X-ray spectrum does not change. We interpret this behavior as either an early jet break or evidence of a transition from the fast cooling regime to the slow cooling regime in a wind environment.

Original language	English (US)
Pages (from-to)	L23-L26
Journal	Astrophysical Journal
Volume	625
Issue number	1 II
DOIs	https://doi.org/10.1086/430883
State	Published - May 20 2005

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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Campana, S., Antonelli, L. A., Chincarini, G., Covino, S., Cusumano, G., Malesani, D., Mangano, V., Moretti, A., Pagani, C., Romand, P., Tagliaferri, G., Capalbi, M., Perri, M., Giommi, P., Angelini, L., Boyd, P., Burrows, D. N., Hill, J. E., Gronwall, C., ... Gehrels, N. (2005). Swift observations of GRB 050128: The early X-ray afterglow. Astrophysical Journal, 625(1 II), L23-L26. https://doi.org/10.1086/430883

@article{74b131ae11684215aef26e5fc86ec8b1,

title = "Swift observations of GRB 050128: The early X-ray afterglow",

abstract = "Swift discovered GRB 050128 with the Burst Alert Telescope and promptly pointed its narrow field instruments to monitor the afterglow. X-ray observations started 108 s after the trigger time. The early decay of the afterglow is relatively flat, with a temporal decay modeled with a power-law index of ∼-0.3. A steepening occurs at later times (∼1500 s) with a power-law index of ∼-1.3. During this transition, the observed X-ray spectrum does not change. We interpret this behavior as either an early jet break or evidence of a transition from the fast cooling regime to the slow cooling regime in a wind environment.",

author = "S. Campana and Antonelli, {L. A.} and G. Chincarini and S. Covino and G. Cusumano and D. Malesani and V. Mangano and A. Moretti and C. Pagani and P. Romand and G. Tagliaferri and M. Capalbi and M. Perri and P. Giommi and L. Angelini and P. Boyd and Burrows, {D. N.} and Hill, {J. E.} and C. Gronwall and Kennea, {J. A.} and S. Kobayashi and P. Kumar and P. M{\'e}sz{\'a}ros and Nousek, {J. A.} and Roming, {P. W.A.} and B. Zhang and Abbey, {A. F.} and Beardmore, {A. P.} and A. Breeveld and Goad, {M. R.} and O. Godet and Mason, {K. O.} and Osborne, {J. P.} and Page, {K. L.} and T. Poole and N. Gehrels",

note = "Funding Information: This work is supported at OAB by funding from ASI of grant I/R/039/04, at Penn State by NASA contract NAS5-00136 and at the University of Leicester by PPARC of grants PPA/ G/S/00524 and PPA/Z/S/2003/00507. We gratefully acknowledge the contributions of dozens of members of the XRT and UVOT team at OAB, PSU, UL, GSFC, ASDC, and MSSL and our subcontractors, who helped make this instrument possible.",

year = "2005",

month = may,

day = "20",

doi = "10.1086/430883",

language = "English (US)",

volume = "625",

pages = "L23--L26",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1 II",

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Campana, S, Antonelli, LA, Chincarini, G, Covino, S, Cusumano, G, Malesani, D, Mangano, V, Moretti, A, Pagani, C, Romand, P, Tagliaferri, G, Capalbi, M, Perri, M, Giommi, P, Angelini, L, Boyd, P, Burrows, DN, Hill, JE, Gronwall, C , Kennea, JA, Kobayashi, S, Kumar, P, Mészáros, P, Nousek, JA, Roming, PWA, Zhang, B, Abbey, AF, Beardmore, AP, Breeveld, A, Goad, MR, Godet, O, Mason, KO, Osborne, JP, Page, KL, Poole, T & Gehrels, N 2005, 'Swift observations of GRB 050128: The early X-ray afterglow', Astrophysical Journal, vol. 625, no. 1 II, pp. L23-L26. https://doi.org/10.1086/430883

TY - JOUR

T1 - Swift observations of GRB 050128

T2 - The early X-ray afterglow

AU - Campana, S.

AU - Antonelli, L. A.

AU - Chincarini, G.

AU - Covino, S.

AU - Cusumano, G.

AU - Malesani, D.

AU - Mangano, V.

AU - Moretti, A.

AU - Pagani, C.

AU - Romand, P.

AU - Tagliaferri, G.

AU - Capalbi, M.

AU - Perri, M.

AU - Giommi, P.

AU - Angelini, L.

AU - Boyd, P.

AU - Burrows, D. N.

AU - Hill, J. E.

AU - Gronwall, C.

AU - Kennea, J. A.

AU - Kobayashi, S.

AU - Kumar, P.

AU - Mészáros, P.

AU - Nousek, J. A.

AU - Roming, P. W.A.

AU - Zhang, B.

AU - Abbey, A. F.

AU - Beardmore, A. P.

AU - Breeveld, A.

AU - Goad, M. R.

AU - Godet, O.

AU - Mason, K. O.

AU - Osborne, J. P.

AU - Page, K. L.

AU - Poole, T.

AU - Gehrels, N.

N1 - Funding Information: This work is supported at OAB by funding from ASI of grant I/R/039/04, at Penn State by NASA contract NAS5-00136 and at the University of Leicester by PPARC of grants PPA/ G/S/00524 and PPA/Z/S/2003/00507. We gratefully acknowledge the contributions of dozens of members of the XRT and UVOT team at OAB, PSU, UL, GSFC, ASDC, and MSSL and our subcontractors, who helped make this instrument possible.

PY - 2005/5/20

Y1 - 2005/5/20

N2 - Swift discovered GRB 050128 with the Burst Alert Telescope and promptly pointed its narrow field instruments to monitor the afterglow. X-ray observations started 108 s after the trigger time. The early decay of the afterglow is relatively flat, with a temporal decay modeled with a power-law index of ∼-0.3. A steepening occurs at later times (∼1500 s) with a power-law index of ∼-1.3. During this transition, the observed X-ray spectrum does not change. We interpret this behavior as either an early jet break or evidence of a transition from the fast cooling regime to the slow cooling regime in a wind environment.

AB - Swift discovered GRB 050128 with the Burst Alert Telescope and promptly pointed its narrow field instruments to monitor the afterglow. X-ray observations started 108 s after the trigger time. The early decay of the afterglow is relatively flat, with a temporal decay modeled with a power-law index of ∼-0.3. A steepening occurs at later times (∼1500 s) with a power-law index of ∼-1.3. During this transition, the observed X-ray spectrum does not change. We interpret this behavior as either an early jet break or evidence of a transition from the fast cooling regime to the slow cooling regime in a wind environment.

UR - http://www.scopus.com/inward/record.url?scp=22144488079&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=22144488079&partnerID=8YFLogxK

U2 - 10.1086/430883

DO - 10.1086/430883

M3 - Article

AN - SCOPUS:22144488079

SN - 0004-637X

VL - 625

SP - L23-L26

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 II

ER -

Swift observations of GRB 050128: The early X-ray afterglow

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