The Optical/IR Counterpart of the 1998 July 3 Gamma-Ray Burst and Its Evolution

A. J. Castro-Tirado; M. R. Zapatero-Osorio; J. Gorosabel; J. Greiner; J. Heidt; D. Herranz; S. N. Kemp; E. Martínez-González; A. Oscoz; V. Ortega; H. J. Röser; C. Wolf; H. Pedersen; A. O. Jaunsen; H. Korhonen; I. Ilyin; R. Duemmler; M. I. Andersen; J. Hjorth; A. A. Henden; F. J. Vrba; J. W. Fried; F. Frontera; L. Nicastro

doi:10.1086/311846

The Optical/IR Counterpart of the 1998 July 3 Gamma-Ray Burst and Its Evolution

A. J. Castro-Tirado^*, M. R. Zapatero-Osorio, J. Gorosabel, J. Greiner, J. Heidt, D. Herranz, S. N. Kemp, E. Martínez-González, A. Oscoz, V. Ortega, H. J. Röser, C. Wolf, H. Pedersen, A. O. Jaunsen, H. Korhonen, I. Ilyin, R. Duemmler, M. I. Andersen, J. Hjorth, A. A. HendenF. J. Vrba, J. W. Fried, F. Frontera, L. Nicastro

^*Corresponding author for this work

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Abstract

We imaged the X-ray error box of GRB 980703, beginning 22.5 hr after the γ-ray event, in both the optical R and near-infrared H bands. A fading optical/IR object was detected within the X-ray error box, coincident with the variable radio source reported by Frail et al. in 1998, who also detected the optical transient independently of us. Further imagery revealed the gamma-ray burst (GRB) host galaxy, with R = 22.49 ± 0.04 and H = 20.5 ± 0.25, the brightest so far detected. When excluding its contribution to the total flux, both the R- and H-band light curves are well fit by a power-law decay with index α ≃ 1.4. Our data suggest an intrinsic column density in the host galaxy of ∼3.5 × 10²¹ cm ^-2, which indicates the existence of a dense and gas-rich medium in which the GRB occurred, thus supporting the hypernova model scenarios.

Original language	English
Pages (from-to)	L85-L88
Journal	Astrophysical Journal
Volume	511
Issue number	2
DOIs	https://doi.org/10.1086/311846
Publication status	Published - 22 Dec 1998
Externally published	Yes

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Castro-Tirado, A. J., Zapatero-Osorio, M. R., Gorosabel, J., Greiner, J., Heidt, J., Herranz, D., Kemp, S. N., Martínez-González, E., Oscoz, A., Ortega, V., Röser, H. J., Wolf, C., Pedersen, H., Jaunsen, A. O., Korhonen, H., Ilyin, I., Duemmler, R., Andersen, M. I., Hjorth, J., ... Nicastro, L. (1998). The Optical/IR Counterpart of the 1998 July 3 Gamma-Ray Burst and Its Evolution. Astrophysical Journal, 511(2), L85-L88. https://doi.org/10.1086/311846

@article{e09799c783da4672bae7d52406b25ea9,

title = "The Optical/IR Counterpart of the 1998 July 3 Gamma-Ray Burst and Its Evolution",

abstract = "We imaged the X-ray error box of GRB 980703, beginning 22.5 hr after the γ-ray event, in both the optical R and near-infrared H bands. A fading optical/IR object was detected within the X-ray error box, coincident with the variable radio source reported by Frail et al. in 1998, who also detected the optical transient independently of us. Further imagery revealed the gamma-ray burst (GRB) host galaxy, with R = 22.49 ± 0.04 and H = 20.5 ± 0.25, the brightest so far detected. When excluding its contribution to the total flux, both the R- and H-band light curves are well fit by a power-law decay with index α ≃ 1.4. Our data suggest an intrinsic column density in the host galaxy of ∼3.5 × 1021 cm -2, which indicates the existence of a dense and gas-rich medium in which the GRB occurred, thus supporting the hypernova model scenarios.",

keywords = "Cosmology: observations, Gamma rays: bursts",

author = "Castro-Tirado, \{A. J.\} and Zapatero-Osorio, \{M. R.\} and J. Gorosabel and J. Greiner and J. Heidt and D. Herranz and Kemp, \{S. N.\} and E. Mart{\'i}nez-Gonz{\'a}lez and A. Oscoz and V. Ortega and R{\"o}ser, \{H. J.\} and C. Wolf and H. Pedersen and Jaunsen, \{A. O.\} and H. Korhonen and I. Ilyin and R. Duemmler and Andersen, \{M. I.\} and J. Hjorth and Henden, \{A. A.\} and Vrba, \{F. J.\} and Fried, \{J. W.\} and F. Frontera and L. Nicastro",

year = "1998",

month = dec,

day = "22",

doi = "10.1086/311846",

language = "English",

volume = "511",

pages = "L85--L88",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "2",

}

Castro-Tirado, AJ, Zapatero-Osorio, MR, Gorosabel, J, Greiner, J, Heidt, J, Herranz, D, Kemp, SN, Martínez-González, E, Oscoz, A, Ortega, V, Röser, HJ, Wolf, C, Pedersen, H, Jaunsen, AO, Korhonen, H, Ilyin, I, Duemmler, R, Andersen, MI, Hjorth, J, Henden, AA, Vrba, FJ, Fried, JW, Frontera, F & Nicastro, L 1998, 'The Optical/IR Counterpart of the 1998 July 3 Gamma-Ray Burst and Its Evolution', Astrophysical Journal, vol. 511, no. 2, pp. L85-L88. https://doi.org/10.1086/311846

TY - JOUR

T1 - The Optical/IR Counterpart of the 1998 July 3 Gamma-Ray Burst and Its Evolution

AU - Castro-Tirado, A. J.

AU - Zapatero-Osorio, M. R.

AU - Gorosabel, J.

AU - Greiner, J.

AU - Heidt, J.

AU - Herranz, D.

AU - Kemp, S. N.

AU - Martínez-González, E.

AU - Oscoz, A.

AU - Ortega, V.

AU - Röser, H. J.

AU - Wolf, C.

AU - Pedersen, H.

AU - Jaunsen, A. O.

AU - Korhonen, H.

AU - Ilyin, I.

AU - Duemmler, R.

AU - Andersen, M. I.

AU - Hjorth, J.

AU - Henden, A. A.

AU - Vrba, F. J.

AU - Fried, J. W.

AU - Frontera, F.

AU - Nicastro, L.

PY - 1998/12/22

Y1 - 1998/12/22

N2 - We imaged the X-ray error box of GRB 980703, beginning 22.5 hr after the γ-ray event, in both the optical R and near-infrared H bands. A fading optical/IR object was detected within the X-ray error box, coincident with the variable radio source reported by Frail et al. in 1998, who also detected the optical transient independently of us. Further imagery revealed the gamma-ray burst (GRB) host galaxy, with R = 22.49 ± 0.04 and H = 20.5 ± 0.25, the brightest so far detected. When excluding its contribution to the total flux, both the R- and H-band light curves are well fit by a power-law decay with index α ≃ 1.4. Our data suggest an intrinsic column density in the host galaxy of ∼3.5 × 1021 cm -2, which indicates the existence of a dense and gas-rich medium in which the GRB occurred, thus supporting the hypernova model scenarios.

AB - We imaged the X-ray error box of GRB 980703, beginning 22.5 hr after the γ-ray event, in both the optical R and near-infrared H bands. A fading optical/IR object was detected within the X-ray error box, coincident with the variable radio source reported by Frail et al. in 1998, who also detected the optical transient independently of us. Further imagery revealed the gamma-ray burst (GRB) host galaxy, with R = 22.49 ± 0.04 and H = 20.5 ± 0.25, the brightest so far detected. When excluding its contribution to the total flux, both the R- and H-band light curves are well fit by a power-law decay with index α ≃ 1.4. Our data suggest an intrinsic column density in the host galaxy of ∼3.5 × 1021 cm -2, which indicates the existence of a dense and gas-rich medium in which the GRB occurred, thus supporting the hypernova model scenarios.

KW - Cosmology: observations

KW - Gamma rays: bursts

UR - http://www.scopus.com/inward/record.url?scp=0033077173&partnerID=8YFLogxK

U2 - 10.1086/311846

DO - 10.1086/311846

M3 - Article

SN - 0004-637X

VL - 511

SP - L85-L88

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

The Optical/IR Counterpart of the 1998 July 3 Gamma-Ray Burst and Its Evolution

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