The X-ray, optical, and infrared counterpart to GRB 980703

P. M. Vreeswijk; T. J. Galama; A. Owens; T. Oosterbroek; T. R. Geballe; J. Van Paradijs; P. J. Groot; C. Kouveliotou; T. Koshut; N. Tanvir; R. A.M.J. Wijers; E. Pian; E. Palazzi; F. Frontera; N. Masetti; C. Robinson; M. Briggs; J. J.M. In 'T Zand; J. Heise; L. Piro; E. Costa; M. Feroci; L. A. Antonelli; K. Hurley; J. Greiner; D. A. Smith; A. M. Levine; Y. Lipkin; E. Leibowitz; C. Lidman; A. Pizzella; H. Böhnhardt; V. Doublier; S. Chaty; I. Smail; A. Blain; J. H. Hough; S. Young; N. Suntzeff

doi:10.1086/307740

The X-ray, optical, and infrared counterpart to GRB 980703

P. M. Vreeswijk^*, T. J. Galama, A. Owens, T. Oosterbroek, T. R. Geballe, J. Van Paradijs, P. J. Groot, C. Kouveliotou, T. Koshut, N. Tanvir, R. A.M.J. Wijers, E. Pian, E. Palazzi, F. Frontera, N. Masetti, C. Robinson, M. Briggs, J. J.M. In 'T Zand, J. Heise, L. PiroE. Costa, M. Feroci, L. A. Antonelli, K. Hurley, J. Greiner, D. A. Smith, A. M. Levine, Y. Lipkin, E. Leibowitz, C. Lidman, A. Pizzella, H. Böhnhardt, V. Doublier, S. Chaty, I. Smail, A. Blain, J. H. Hough, S. Young, N. Suntzeff

^*Corresponding author for this work

School of Physics and Astronomy

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Abstract

We report on X-ray, optical, and infrared follow-up observations of GRB 980703. We detect a previously unknown X-ray source in the GRB error box; assuming a power-law decline, we find for its decay index α < -0.91 (3 σ). We invoke host-galaxy extinction to match the observed spectral slope with the slope expected from "fireball" models. We find no evidence for a spectral break in the infrared to X-ray spectral range on 1998 July 4.4, and determine a lower limit of the cooling break frequency, v_c > 1.3 × 10¹⁷ Hz. For this epoch we obtain an extinction of A_V = 1.50 ± 0.11. From the X-ray data we estimate the optical extinction to be A_V = 20.2_-7.3^+12.3, inconsistent with the former value. Our optical spectra confirm the redshift of z = 0.966. We compare the afterglow of GRB 980703 with that of GRB 970508 and find that the fraction of the energy in the magnetic field, ∈_B < 6 × 10^-5, is much lower in the case of GRB 980703, as a consequence of the high frequency of the cooling break.

Original language	English
Pages (from-to)	171-176
Number of pages	6
Journal	Astrophysical Journal
Volume	523
Issue number	1 PART 1
DOIs	https://doi.org/10.1086/307740
State	Published - 20 Sep 1999

Keywords

Gamma rays: bursts
Infrared: galaxies
Radiation mechanisms: nonthermal
X-rays: galaxies

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10.1086/307740

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Vreeswijk, P. M., Galama, T. J., Owens, A., Oosterbroek, T., Geballe, T. R., Van Paradijs, J., Groot, P. J., Kouveliotou, C., Koshut, T., Tanvir, N., Wijers, R. A. M. J., Pian, E., Palazzi, E., Frontera, F., Masetti, N., Robinson, C., Briggs, M., In 'T Zand, J. J. M., Heise, J., ... Suntzeff, N. (1999). The X-ray, optical, and infrared counterpart to GRB 980703. Astrophysical Journal, 523(1 PART 1), 171-176. https://doi.org/10.1086/307740

@article{e86090d74b9d4b0eb438594900ce8ef8,

title = "The X-ray, optical, and infrared counterpart to GRB 980703",

abstract = "We report on X-ray, optical, and infrared follow-up observations of GRB 980703. We detect a previously unknown X-ray source in the GRB error box; assuming a power-law decline, we find for its decay index α < -0.91 (3 σ). We invoke host-galaxy extinction to match the observed spectral slope with the slope expected from {"}fireball{"} models. We find no evidence for a spectral break in the infrared to X-ray spectral range on 1998 July 4.4, and determine a lower limit of the cooling break frequency, vc > 1.3 × 1017 Hz. For this epoch we obtain an extinction of AV = 1.50 ± 0.11. From the X-ray data we estimate the optical extinction to be AV = 20.2-7.3+12.3, inconsistent with the former value. Our optical spectra confirm the redshift of z = 0.966. We compare the afterglow of GRB 980703 with that of GRB 970508 and find that the fraction of the energy in the magnetic field, ∈B < 6 × 10-5, is much lower in the case of GRB 980703, as a consequence of the high frequency of the cooling break.",

keywords = "Gamma rays: bursts, Infrared: galaxies, Radiation mechanisms: nonthermal, X-rays: galaxies",

author = "Vreeswijk, {P. M.} and Galama, {T. J.} and A. Owens and T. Oosterbroek and Geballe, {T. R.} and {Van Paradijs}, J. and Groot, {P. J.} and C. Kouveliotou and T. Koshut and N. Tanvir and Wijers, {R. A.M.J.} and E. Pian and E. Palazzi and F. Frontera and N. Masetti and C. Robinson and M. Briggs and {In 'T Zand}, {J. J.M.} and J. Heise and L. Piro and E. Costa and M. Feroci and Antonelli, {L. A.} and K. Hurley and J. Greiner and Smith, {D. A.} and Levine, {A. M.} and Y. Lipkin and E. Leibowitz and C. Lidman and A. Pizzella and H. B{\"o}hnhardt and V. Doublier and S. Chaty and I. Smail and A. Blain and Hough, {J. H.} and S. Young and N. Suntzeff",

year = "1999",

month = sep,

day = "20",

doi = "10.1086/307740",

language = "אנגלית",

volume = "523",

pages = "171--176",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "1 PART 1",

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Vreeswijk, PM, Galama, TJ, Owens, A, Oosterbroek, T, Geballe, TR, Van Paradijs, J, Groot, PJ, Kouveliotou, C, Koshut, T, Tanvir, N, Wijers, RAMJ, Pian, E, Palazzi, E, Frontera, F, Masetti, N, Robinson, C, Briggs, M, In 'T Zand, JJM, Heise, J, Piro, L, Costa, E, Feroci, M, Antonelli, LA, Hurley, K, Greiner, J, Smith, DA, Levine, AM, Lipkin, Y, Leibowitz, E, Lidman, C, Pizzella, A, Böhnhardt, H, Doublier, V, Chaty, S, Smail, I, Blain, A, Hough, JH, Young, S & Suntzeff, N 1999, 'The X-ray, optical, and infrared counterpart to GRB 980703', Astrophysical Journal, vol. 523, no. 1 PART 1, pp. 171-176. https://doi.org/10.1086/307740

TY - JOUR

T1 - The X-ray, optical, and infrared counterpart to GRB 980703

AU - Vreeswijk, P. M.

AU - Galama, T. J.

AU - Owens, A.

AU - Oosterbroek, T.

AU - Geballe, T. R.

AU - Van Paradijs, J.

AU - Groot, P. J.

AU - Kouveliotou, C.

AU - Koshut, T.

AU - Tanvir, N.

AU - Wijers, R. A.M.J.

AU - Pian, E.

AU - Palazzi, E.

AU - Frontera, F.

AU - Masetti, N.

AU - Robinson, C.

AU - Briggs, M.

AU - In 'T Zand, J. J.M.

AU - Heise, J.

AU - Piro, L.

AU - Costa, E.

AU - Feroci, M.

AU - Antonelli, L. A.

AU - Hurley, K.

AU - Greiner, J.

AU - Smith, D. A.

AU - Levine, A. M.

AU - Lipkin, Y.

AU - Leibowitz, E.

AU - Lidman, C.

AU - Pizzella, A.

AU - Böhnhardt, H.

AU - Doublier, V.

AU - Chaty, S.

AU - Smail, I.

AU - Blain, A.

AU - Hough, J. H.

AU - Young, S.

AU - Suntzeff, N.

PY - 1999/9/20

Y1 - 1999/9/20

N2 - We report on X-ray, optical, and infrared follow-up observations of GRB 980703. We detect a previously unknown X-ray source in the GRB error box; assuming a power-law decline, we find for its decay index α < -0.91 (3 σ). We invoke host-galaxy extinction to match the observed spectral slope with the slope expected from "fireball" models. We find no evidence for a spectral break in the infrared to X-ray spectral range on 1998 July 4.4, and determine a lower limit of the cooling break frequency, vc > 1.3 × 1017 Hz. For this epoch we obtain an extinction of AV = 1.50 ± 0.11. From the X-ray data we estimate the optical extinction to be AV = 20.2-7.3+12.3, inconsistent with the former value. Our optical spectra confirm the redshift of z = 0.966. We compare the afterglow of GRB 980703 with that of GRB 970508 and find that the fraction of the energy in the magnetic field, ∈B < 6 × 10-5, is much lower in the case of GRB 980703, as a consequence of the high frequency of the cooling break.

AB - We report on X-ray, optical, and infrared follow-up observations of GRB 980703. We detect a previously unknown X-ray source in the GRB error box; assuming a power-law decline, we find for its decay index α < -0.91 (3 σ). We invoke host-galaxy extinction to match the observed spectral slope with the slope expected from "fireball" models. We find no evidence for a spectral break in the infrared to X-ray spectral range on 1998 July 4.4, and determine a lower limit of the cooling break frequency, vc > 1.3 × 1017 Hz. For this epoch we obtain an extinction of AV = 1.50 ± 0.11. From the X-ray data we estimate the optical extinction to be AV = 20.2-7.3+12.3, inconsistent with the former value. Our optical spectra confirm the redshift of z = 0.966. We compare the afterglow of GRB 980703 with that of GRB 970508 and find that the fraction of the energy in the magnetic field, ∈B < 6 × 10-5, is much lower in the case of GRB 980703, as a consequence of the high frequency of the cooling break.

KW - Gamma rays: bursts

KW - Infrared: galaxies

KW - Radiation mechanisms: nonthermal

KW - X-rays: galaxies

UR - http://www.scopus.com/inward/record.url?scp=0040475591&partnerID=8YFLogxK

U2 - 10.1086/307740

DO - 10.1086/307740

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:0040475591

SN - 0004-637X

VL - 523

SP - 171

EP - 176

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 PART 1

ER -

The X-ray, optical, and infrared counterpart to GRB 980703

Abstract

Keywords

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