Discovery of the optical counterpart and early optical observations of GRB 990712

K. C. Sahu, P. Vreeswijk, G. Bakos, J. W. Menzies, A. Bragaglia, F. Frontera, L. Piro, M. D. Albrow, I. A. Bond, R. Bower, J. A.R. Caldwell, A. J. Castro-Tirado, F. Courbin, M. Dominik, J. U. Fynbo, T. Galama, K. Glazebrook, J. Greenhill, J. Gorosabel, J. HearnshawK. Hill, J. Hjorth, S. Kane, P. M. Kilmartin, C. Kouveliotou, R. Martin, N. Masetti, P. Maxted, D. Minniti, P. Møller, Y. Muraki, T. Nakamura, S. Noda, K. Ohnishi, E. Palazzi, J. Van Paradijs, E. Pian, K. R. Pollard, N. J. Rattenbury, M. Reid, E. Rol, T. Saito, P. D. Sackett, P. Saizar, C. Tinney, P. Vermaak, R. Watson, A. Williams, P. Yock, A. Dar

Resultado de la investigación: Article

38 Citas (Scopus)

Resumen

We present the discovery observations of the optical counterpart of the gamma-ray burst GRB 990712 taken 4.16 hr after the outburst and discuss its light curve observed in the V, R, and I bands during the first ∼35 days after the outburst. The observed light curves were fitted with a power-law decay for the optical transient (OT), plus an additional component that was treated in two different ways. First, the additional component was assumed to be an underlying galaxy of constant brightness. The resulting slope of the decay is 0.97+0.05 -0.02 and the magnitudes of the underlying galaxy are V = 22.3 ± 0.05, R = 21.75 ± 0.05, and I = 21.35 ± 0.05. Second, the additional component was assumed to be a galaxy plus an underlying supernova with a time-variable brightness identical to that of GRB 980425, appropriately scaled to the redshift of GRB 990712. The resulting slope of the decay is similar, but the goodness of fit is worse, which would imply that either this GRB is not associated with an underlying supernova or the underlying supernova is much fainter than the supernova associated with GRB 980425. The galaxy in this case is fainter: V = 22.7 ± 0.05, R = 22.25 ± 0.05, and I = 22.15 ± 0.05, and the OT plus the underlying supernova at a given time is brighter. Measurements of the brightnesses of the OT and the galaxy by late-time Bubble Space Telescope observation and ground-based observations can thus assess the presence of an underlying supernova.

Idioma originalEnglish
Páginas (desde-hasta)74-80
Número de páginas7
PublicaciónAstrophysical Journal
Volumen540
N.º1 PART 1
EstadoPublished - 1 sep 2000

Huella dactilar

supernovae
outburst
galaxies
brightness
light curve
bubble
power law
decay
slopes
goodness of fit
extremely high frequencies
gamma ray bursts
bubbles
telescopes

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Sahu, K. C., Vreeswijk, P., Bakos, G., Menzies, J. W., Bragaglia, A., Frontera, F., ... Dar, A. (2000). Discovery of the optical counterpart and early optical observations of GRB 990712. Astrophysical Journal, 540(1 PART 1), 74-80.
Sahu, K. C. ; Vreeswijk, P. ; Bakos, G. ; Menzies, J. W. ; Bragaglia, A. ; Frontera, F. ; Piro, L. ; Albrow, M. D. ; Bond, I. A. ; Bower, R. ; Caldwell, J. A.R. ; Castro-Tirado, A. J. ; Courbin, F. ; Dominik, M. ; Fynbo, J. U. ; Galama, T. ; Glazebrook, K. ; Greenhill, J. ; Gorosabel, J. ; Hearnshaw, J. ; Hill, K. ; Hjorth, J. ; Kane, S. ; Kilmartin, P. M. ; Kouveliotou, C. ; Martin, R. ; Masetti, N. ; Maxted, P. ; Minniti, D. ; Møller, P. ; Muraki, Y. ; Nakamura, T. ; Noda, S. ; Ohnishi, K. ; Palazzi, E. ; Van Paradijs, J. ; Pian, E. ; Pollard, K. R. ; Rattenbury, N. J. ; Reid, M. ; Rol, E. ; Saito, T. ; Sackett, P. D. ; Saizar, P. ; Tinney, C. ; Vermaak, P. ; Watson, R. ; Williams, A. ; Yock, P. ; Dar, A. / Discovery of the optical counterpart and early optical observations of GRB 990712. En: Astrophysical Journal. 2000 ; Vol. 540, N.º 1 PART 1. pp. 74-80.
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title = "Discovery of the optical counterpart and early optical observations of GRB 990712",
abstract = "We present the discovery observations of the optical counterpart of the gamma-ray burst GRB 990712 taken 4.16 hr after the outburst and discuss its light curve observed in the V, R, and I bands during the first ∼35 days after the outburst. The observed light curves were fitted with a power-law decay for the optical transient (OT), plus an additional component that was treated in two different ways. First, the additional component was assumed to be an underlying galaxy of constant brightness. The resulting slope of the decay is 0.97+0.05 -0.02 and the magnitudes of the underlying galaxy are V = 22.3 ± 0.05, R = 21.75 ± 0.05, and I = 21.35 ± 0.05. Second, the additional component was assumed to be a galaxy plus an underlying supernova with a time-variable brightness identical to that of GRB 980425, appropriately scaled to the redshift of GRB 990712. The resulting slope of the decay is similar, but the goodness of fit is worse, which would imply that either this GRB is not associated with an underlying supernova or the underlying supernova is much fainter than the supernova associated with GRB 980425. The galaxy in this case is fainter: V = 22.7 ± 0.05, R = 22.25 ± 0.05, and I = 22.15 ± 0.05, and the OT plus the underlying supernova at a given time is brighter. Measurements of the brightnesses of the OT and the galaxy by late-time Bubble Space Telescope observation and ground-based observations can thus assess the presence of an underlying supernova.",
keywords = "Cosmology: observations, Gamma rays: bursts",
author = "Sahu, {K. C.} and P. Vreeswijk and G. Bakos and Menzies, {J. W.} and A. Bragaglia and F. Frontera and L. Piro and Albrow, {M. D.} and Bond, {I. A.} and R. Bower and Caldwell, {J. A.R.} and Castro-Tirado, {A. J.} and F. Courbin and M. Dominik and Fynbo, {J. U.} and T. Galama and K. Glazebrook and J. Greenhill and J. Gorosabel and J. Hearnshaw and K. Hill and J. Hjorth and S. Kane and Kilmartin, {P. M.} and C. Kouveliotou and R. Martin and N. Masetti and P. Maxted and D. Minniti and P. M{\o}ller and Y. Muraki and T. Nakamura and S. Noda and K. Ohnishi and E. Palazzi and {Van Paradijs}, J. and E. Pian and Pollard, {K. R.} and Rattenbury, {N. J.} and M. Reid and E. Rol and T. Saito and Sackett, {P. D.} and P. Saizar and C. Tinney and P. Vermaak and R. Watson and A. Williams and P. Yock and A. Dar",
year = "2000",
month = "9",
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volume = "540",
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Sahu, KC, Vreeswijk, P, Bakos, G, Menzies, JW, Bragaglia, A, Frontera, F, Piro, L, Albrow, MD, Bond, IA, Bower, R, Caldwell, JAR, Castro-Tirado, AJ, Courbin, F, Dominik, M, Fynbo, JU, Galama, T, Glazebrook, K, Greenhill, J, Gorosabel, J, Hearnshaw, J, Hill, K, Hjorth, J, Kane, S, Kilmartin, PM, Kouveliotou, C, Martin, R, Masetti, N, Maxted, P, Minniti, D, Møller, P, Muraki, Y, Nakamura, T, Noda, S, Ohnishi, K, Palazzi, E, Van Paradijs, J, Pian, E, Pollard, KR, Rattenbury, NJ, Reid, M, Rol, E, Saito, T, Sackett, PD, Saizar, P, Tinney, C, Vermaak, P, Watson, R, Williams, A, Yock, P & Dar, A 2000, 'Discovery of the optical counterpart and early optical observations of GRB 990712', Astrophysical Journal, vol. 540, n.º 1 PART 1, pp. 74-80.

Discovery of the optical counterpart and early optical observations of GRB 990712. / Sahu, K. C.; Vreeswijk, P.; Bakos, G.; Menzies, J. W.; Bragaglia, A.; Frontera, F.; Piro, L.; Albrow, M. D.; Bond, I. A.; Bower, R.; Caldwell, J. A.R.; Castro-Tirado, A. J.; Courbin, F.; Dominik, M.; Fynbo, J. U.; Galama, T.; Glazebrook, K.; Greenhill, J.; Gorosabel, J.; Hearnshaw, J.; Hill, K.; Hjorth, J.; Kane, S.; Kilmartin, P. M.; Kouveliotou, C.; Martin, R.; Masetti, N.; Maxted, P.; Minniti, D.; Møller, P.; Muraki, Y.; Nakamura, T.; Noda, S.; Ohnishi, K.; Palazzi, E.; Van Paradijs, J.; Pian, E.; Pollard, K. R.; Rattenbury, N. J.; Reid, M.; Rol, E.; Saito, T.; Sackett, P. D.; Saizar, P.; Tinney, C.; Vermaak, P.; Watson, R.; Williams, A.; Yock, P.; Dar, A.

En: Astrophysical Journal, Vol. 540, N.º 1 PART 1, 01.09.2000, p. 74-80.

Resultado de la investigación: Article

TY - JOUR

T1 - Discovery of the optical counterpart and early optical observations of GRB 990712

AU - Sahu, K. C.

AU - Vreeswijk, P.

AU - Bakos, G.

AU - Menzies, J. W.

AU - Bragaglia, A.

AU - Frontera, F.

AU - Piro, L.

AU - Albrow, M. D.

AU - Bond, I. A.

AU - Bower, R.

AU - Caldwell, J. A.R.

AU - Castro-Tirado, A. J.

AU - Courbin, F.

AU - Dominik, M.

AU - Fynbo, J. U.

AU - Galama, T.

AU - Glazebrook, K.

AU - Greenhill, J.

AU - Gorosabel, J.

AU - Hearnshaw, J.

AU - Hill, K.

AU - Hjorth, J.

AU - Kane, S.

AU - Kilmartin, P. M.

AU - Kouveliotou, C.

AU - Martin, R.

AU - Masetti, N.

AU - Maxted, P.

AU - Minniti, D.

AU - Møller, P.

AU - Muraki, Y.

AU - Nakamura, T.

AU - Noda, S.

AU - Ohnishi, K.

AU - Palazzi, E.

AU - Van Paradijs, J.

AU - Pian, E.

AU - Pollard, K. R.

AU - Rattenbury, N. J.

AU - Reid, M.

AU - Rol, E.

AU - Saito, T.

AU - Sackett, P. D.

AU - Saizar, P.

AU - Tinney, C.

AU - Vermaak, P.

AU - Watson, R.

AU - Williams, A.

AU - Yock, P.

AU - Dar, A.

PY - 2000/9/1

Y1 - 2000/9/1

N2 - We present the discovery observations of the optical counterpart of the gamma-ray burst GRB 990712 taken 4.16 hr after the outburst and discuss its light curve observed in the V, R, and I bands during the first ∼35 days after the outburst. The observed light curves were fitted with a power-law decay for the optical transient (OT), plus an additional component that was treated in two different ways. First, the additional component was assumed to be an underlying galaxy of constant brightness. The resulting slope of the decay is 0.97+0.05 -0.02 and the magnitudes of the underlying galaxy are V = 22.3 ± 0.05, R = 21.75 ± 0.05, and I = 21.35 ± 0.05. Second, the additional component was assumed to be a galaxy plus an underlying supernova with a time-variable brightness identical to that of GRB 980425, appropriately scaled to the redshift of GRB 990712. The resulting slope of the decay is similar, but the goodness of fit is worse, which would imply that either this GRB is not associated with an underlying supernova or the underlying supernova is much fainter than the supernova associated with GRB 980425. The galaxy in this case is fainter: V = 22.7 ± 0.05, R = 22.25 ± 0.05, and I = 22.15 ± 0.05, and the OT plus the underlying supernova at a given time is brighter. Measurements of the brightnesses of the OT and the galaxy by late-time Bubble Space Telescope observation and ground-based observations can thus assess the presence of an underlying supernova.

AB - We present the discovery observations of the optical counterpart of the gamma-ray burst GRB 990712 taken 4.16 hr after the outburst and discuss its light curve observed in the V, R, and I bands during the first ∼35 days after the outburst. The observed light curves were fitted with a power-law decay for the optical transient (OT), plus an additional component that was treated in two different ways. First, the additional component was assumed to be an underlying galaxy of constant brightness. The resulting slope of the decay is 0.97+0.05 -0.02 and the magnitudes of the underlying galaxy are V = 22.3 ± 0.05, R = 21.75 ± 0.05, and I = 21.35 ± 0.05. Second, the additional component was assumed to be a galaxy plus an underlying supernova with a time-variable brightness identical to that of GRB 980425, appropriately scaled to the redshift of GRB 990712. The resulting slope of the decay is similar, but the goodness of fit is worse, which would imply that either this GRB is not associated with an underlying supernova or the underlying supernova is much fainter than the supernova associated with GRB 980425. The galaxy in this case is fainter: V = 22.7 ± 0.05, R = 22.25 ± 0.05, and I = 22.15 ± 0.05, and the OT plus the underlying supernova at a given time is brighter. Measurements of the brightnesses of the OT and the galaxy by late-time Bubble Space Telescope observation and ground-based observations can thus assess the presence of an underlying supernova.

KW - Cosmology: observations

KW - Gamma rays: bursts

UR - http://www.scopus.com/inward/record.url?scp=18544402588&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:18544402588

VL - 540

SP - 74

EP - 80

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1 PART 1

ER -

Sahu KC, Vreeswijk P, Bakos G, Menzies JW, Bragaglia A, Frontera F y otros. Discovery of the optical counterpart and early optical observations of GRB 990712. Astrophysical Journal. 2000 sep 1;540(1 PART 1):74-80.