We investigate the optical/near-infrared light curve of the afterglow of GRB
080710 in the context of rising afterglows. Optical and near-infrared
photometry was performed using the seven channel imager GROND and the
Tautenburg Schmidt telescope. X-ray data were provided by the X-ray Telescope
onboard the Swift satellite. The optical/NIR light curve of the afterglow of
GRB 080710 is dominated by an initial increase in brightness, which smoothly
turns over into a shallow power law decay. The initially rising achromatic
light curve of the afterglow of GRB 080710 can be accounted for with a model of
a burst viewed off-axis or a single jet in its pre deceleration phase and in an
on-axis geometry. An unified picture of the afterglow light curve and prompt
emission properties can be obtained with an off-axis geometry, suggesting that
late and shallow rising optical light curves of GRB afterglows might be
produced by geometric effects.Comment: 9 pages, 4 figures, accepted by A and 

Afonso, P.

Burlon, D.

Clemens, C.

Filgas, R.

Greiner, J.

Kann, D. A.

Klose, S.

Krühler, T.

McBreen, S.

Olivares, F.

Rau, A.

Rossi, A.

Schulze, S.

Szokoly, G. P.

Updike, A.

Yoldas, A.

Yoldas, A. Küpcü

English

arXiv

Aims. We investigate the optical/near-infrared light curve of the afterglow of GRB 080710 in the context of rising afterglows. Methods. Optical and near-infrared photometry was performed using the seven-channel imager GROND and the Tautenburg Schmidt telescope. X-ray data were provided by the X-ray Telescope onboard the Swift satellite. We construct an empirical light curve model using the available broadband data, which is well-sampled in the time and frequency domains. Results. The optical/NIR light curve of the afterglow of GRB 080710 is dominated by an initial increase in brightness, which smoothly turns over into a shallow power law decay. At around 10 ks post-burst, there is an achromatic break from shallow to steeper decline in the afterglow light curve with a change in the power law index of Δα ∼ 0.9.Conclusions.The initially rising achromatic light curve of the afterglow of GRB 080710 can be accounted for with a model of a burst viewed off-axis or a single jet in its pre-deceleration phase and in an on-axis geometry. A unified picture of the afterglow light curve and prompt emission properties can be obtained with an off-axis geometry, suggesting that late and shallow rising optical light curves of GRB afterglows might be produced by geometric effects

Küpcü Yolda¸, A.

Updike, Adria

Yolda¸s, A.

DOCS@RWU

The bright optical/NIR afterglow of the faint GRB 080710 – evidence of a jet viewed off-axis

Aims. We investigate the optical/near-infrared light curve of the afterglow of GRB 080710 in the context of rising afterglows.
        Methods. Optical and near-infrared photometry was performed using the seven-channel imager GROND and the Tautenburg Schmidt telescope. X-ray data were provided by the X-ray Telescope onboard the Swift satellite. We construct an empirical light curve model using the available broadband data, which is well-sampled in the time and frequency domains.
        Results. The optical/NIR light curve of the afterglow of GRB 080710 is dominated by an initial increase in brightness, which smoothly turns over into a shallow power law decay. At around 10 ks post-burst, there is an achromatic break from shallow to steeper decline in the afterglow light curve with a change in the power law index of $\Delta\alpha\sim 0.9$.
        Conclusions. The initially rising achromatic light curve of the afterglow of GRB 080710 can be accounted for with a model of a burst viewed off-axis or a single jet in its pre-deceleration phase and in an on-axis geometry. A unified picture of the afterglow light curve and prompt emission properties can be obtained with an off-axis geometry, suggesting that late and shallow rising optical light curves of GRB afterglows might be produced by geometric effects

T. Krühler

J. Greiner

P. Afonso

D. Burlon

C. Clemens

R. Filgas

D. A. Kann

S. Klose

A. Küpcü Yoldaş

S. McBreen

F. Olivares

A. Rau

A. Rossi

S. Schulze

G. P. Szokoly

A. Updike

A. Yoldaş

EDP Sciences OAI-PMH repository (1.2.0)

The bright optical/NIR afterglow of the faint GRB 080710 – evidence of a jet viewed off-axis

Küpcü Yoldas, A.

Max Planck Society eDoc Server

Kann, D.

Szokoly, G.

MPG.PuRe

HELIN Digital Commons