The rapid decay of the optical emission from GRB 980326 and its possible implications

P. J. Groot; T. J. Galama; P. M. Vreeswijk; R. A.M.J. Wijers; E. Pian; E. Palazzi; J. Van Paradijs; C. Kouveliotou; J. J.M. In 'T Zand; J. Heise; C. Robinson; N. Tanvir; C. Lidman; C. Tinney; M. Keane; M. Briggs; K. Hurley; J. F. Gonzalez; P. Hall; M. G. Smith; R. Covarrubias; P. G. Jonker; J. Casares; N. Masetti; F. Frontera; M. Feroci; L. Piro; E. Costa; R. Smith; B. Jones; D. Windridge; J. Bland-Hawthorn; S. Veilleux; M. Garcia; W. R. Brown; K. Z. Stanek; A. J. Castro-Tirado; J. Gorosabel; J. Greiner; K. Jäger; A. Böhm; K. J. Fricke

doi:10.1086/311509

The rapid decay of the optical emission from GRB 980326 and its possible implications

P. J. Groot, T. J. Galama, P. M. Vreeswijk, R. A.M.J. Wijers, E. Pian, E. Palazzi, J. Van Paradijs, C. Kouveliotou, J. J.M. In 'T Zand, J. Heise, C. Robinson, N. Tanvir, C. Lidman, C. Tinney, M. Keane, M. Briggs, K. Hurley, J. F. Gonzalez, P. Hall, M. G. SmithR. Covarrubias, P. G. Jonker, J. Casares, N. Masetti, F. Frontera, M. Feroci, L. Piro, E. Costa, R. Smith, B. Jones, D. Windridge, J. Bland-Hawthorn, S. Veilleux, M. Garcia, W. R. Brown, K. Z. Stanek, A. J. Castro-Tirado, J. Gorosabel, J. Greiner, K. Jäger, A. Böhm, K. J. Fricke

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Abstract

We report the discovery of the optical counterpart to GRB 980326. Its rapid optical decay can be characterized by a power law with exponent -2.10 ± 0.13 and a constant underlying source at R_c = 25.5 ± 0.5. Its optical colors 2.1 days after the burst imply a spectral slope of -0.66 ± 0.70. The γ-ray spectrum as observed with BATSE shows that it is among the 4% softest bursts ever recorded. We argue that the rapid optical decay may be a reason for the nondetection of some low-energy afterglows of GRBs.

Original language	English (US)
Pages (from-to)	L123-L127
Journal	Astrophysical Journal
Volume	502
Issue number	2 PART 2
DOIs	https://doi.org/10.1086/311509
State	Published - Aug 1 1998
Externally published	Yes

Keywords

Gamma rays: bursts
Gamma rays: observations
Radiation mechanisms: nonthermal

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Online availability

10.1086/311509

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Groot, P. J., Galama, T. J., Vreeswijk, P. M., Wijers, R. A. M. J., Pian, E., Palazzi, E., Van Paradijs, J., Kouveliotou, C., In 'T Zand, J. J. M., Heise, J., Robinson, C., Tanvir, N., Lidman, C., Tinney, C., Keane, M., Briggs, M., Hurley, K., Gonzalez, J. F., Hall, P., ... Fricke, K. J. (1998). The rapid decay of the optical emission from GRB 980326 and its possible implications. Astrophysical Journal, 502(2 PART 2), L123-L127. https://doi.org/10.1086/311509

Groot, PJ, Galama, TJ, Vreeswijk, PM, Wijers, RAMJ, Pian, E, Palazzi, E, Van Paradijs, J, Kouveliotou, C, In 'T Zand, JJM, Heise, J, Robinson, C, Tanvir, N, Lidman, C, Tinney, C, Keane, M, Briggs, M, Hurley, K, Gonzalez, JF, Hall, P, Smith, MG, Covarrubias, R, Jonker, PG, Casares, J, Masetti, N, Frontera, F, Feroci, M, Piro, L, Costa, E, Smith, R, Jones, B, Windridge, D, Bland-Hawthorn, J, Veilleux, S, Garcia, M, Brown, WR, Stanek, KZ, Castro-Tirado, AJ, Gorosabel, J, Greiner, J, Jäger, K, Böhm, A & Fricke, KJ 1998, 'The rapid decay of the optical emission from GRB 980326 and its possible implications', Astrophysical Journal, vol. 502, no. 2 PART 2, pp. L123-L127. https://doi.org/10.1086/311509

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abstract = "We report the discovery of the optical counterpart to GRB 980326. Its rapid optical decay can be characterized by a power law with exponent -2.10 ± 0.13 and a constant underlying source at Rc = 25.5 ± 0.5. Its optical colors 2.1 days after the burst imply a spectral slope of -0.66 ± 0.70. The γ-ray spectrum as observed with BATSE shows that it is among the 4% softest bursts ever recorded. We argue that the rapid optical decay may be a reason for the nondetection of some low-energy afterglows of GRBs.",

keywords = "Gamma rays: bursts, Gamma rays: observations, Radiation mechanisms: nonthermal",

author = "Groot, {P. J.} and Galama, {T. J.} and Vreeswijk, {P. M.} and Wijers, {R. A.M.J.} and E. Pian and E. Palazzi and {Van Paradijs}, J. and C. Kouveliotou and {In 'T Zand}, {J. J.M.} and J. Heise and C. Robinson and N. Tanvir and C. Lidman and C. Tinney and M. Keane and M. Briggs and K. Hurley and Gonzalez, {J. F.} and P. Hall and Smith, {M. G.} and R. Covarrubias and Jonker, {P. G.} and J. Casares and N. Masetti and F. Frontera and M. Feroci and L. Piro and E. Costa and R. Smith and B. Jones and D. Windridge and J. Bland-Hawthorn and S. Veilleux and M. Garcia and Brown, {W. R.} and Stanek, {K. Z.} and Castro-Tirado, {A. J.} and J. Gorosabel and J. Greiner and K. J{\"a}ger and A. B{\"o}hm and Fricke, {K. J.}",

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AU - Groot, P. J.

AU - Galama, T. J.

AU - Vreeswijk, P. M.

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

AU - Pian, E.

AU - Palazzi, E.

AU - Van Paradijs, J.

AU - Kouveliotou, C.

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

AU - Heise, J.

AU - Robinson, C.

AU - Tanvir, N.

AU - Lidman, C.

AU - Tinney, C.

AU - Keane, M.

AU - Briggs, M.

AU - Hurley, K.

AU - Gonzalez, J. F.

AU - Hall, P.

AU - Smith, M. G.

AU - Covarrubias, R.

AU - Jonker, P. G.

AU - Casares, J.

AU - Masetti, N.

AU - Frontera, F.

AU - Feroci, M.

AU - Piro, L.

AU - Costa, E.

AU - Smith, R.

AU - Jones, B.

AU - Windridge, D.

AU - Bland-Hawthorn, J.

AU - Veilleux, S.

AU - Garcia, M.

AU - Brown, W. R.

AU - Stanek, K. Z.

AU - Castro-Tirado, A. J.

AU - Gorosabel, J.

AU - Greiner, J.

AU - Jäger, K.

AU - Böhm, A.

AU - Fricke, K. J.

PY - 1998/8/1

Y1 - 1998/8/1

N2 - We report the discovery of the optical counterpart to GRB 980326. Its rapid optical decay can be characterized by a power law with exponent -2.10 ± 0.13 and a constant underlying source at Rc = 25.5 ± 0.5. Its optical colors 2.1 days after the burst imply a spectral slope of -0.66 ± 0.70. The γ-ray spectrum as observed with BATSE shows that it is among the 4% softest bursts ever recorded. We argue that the rapid optical decay may be a reason for the nondetection of some low-energy afterglows of GRBs.

AB - We report the discovery of the optical counterpart to GRB 980326. Its rapid optical decay can be characterized by a power law with exponent -2.10 ± 0.13 and a constant underlying source at Rc = 25.5 ± 0.5. Its optical colors 2.1 days after the burst imply a spectral slope of -0.66 ± 0.70. The γ-ray spectrum as observed with BATSE shows that it is among the 4% softest bursts ever recorded. We argue that the rapid optical decay may be a reason for the nondetection of some low-energy afterglows of GRBs.

KW - Gamma rays: bursts

KW - Gamma rays: observations

KW - Radiation mechanisms: nonthermal

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The rapid decay of the optical emission from GRB 980326 and its possible implications

Abstract

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