2002A&A...393..445C

Query : 2002A&A...393..445C

2002A&A...393..445C - Astronomy and Astrophysics, volume 393, 445-451 (2002/10-2)

The bright optical afterglow of the long GRB 001007.

CASTRO CERON J.M., CASTRO-TIRADO A.J., GOROSABEL J., HJORTH J., FYNBO J.U., JENSEN B.L., PEDERSEN H., ANDERSEN M.I., LOPEZ-CORREDOIRA M., SUAREZ O., GROSDIDIER Y., CASARES J., PEREZ-RAMIREZ D., MILVANG-JENSEN B., MALLEN-ORNELAS G., FRUCHTER A., GREINER J., PIAN E., VREESWIJK P.M., BARTHELMY S.D., CLINE T., FRONTERA F., KAPER L., KLOSE S., KOUVELIOTOU C., HARTMANN D.H., HURLEY K., MASETTI N., MAZETS E., PALAZZI E., PARK H.S., ROL E., SALAMANCA I., TANVIR N., TROMBKA J.I., WIJERS R.A.M.J., WILLIAMS G.G. and VAN DEN HEUVEL E.

Abstract (from CDS):

We present optical follow up observations of the long GRB 001007 between 6.14 hours and ∼468 days after the event. An unusually bright optical afterglow (OA) was seen to decline following a steep power law decay with index α=-2.03±0.11, possibly indicating a break in the light curve at t-t₀<3.5days, as found in other bursts. Upper limits imposed by the LOTIS alerting system 6.14 hours after the gamma ray event provide tentative (1.2σ) evidence for a break in the optical light curve. The spectral index β of the OA yields -1.24±0.57. These values may be explained both by several fireball jet models and by the cannonball model. Fireball spherical expansion models are not favoured. Late epoch deep imaging revealed the presence of a complex host galaxy system, composed of at least two objects located 1.2" (1.7σ) and 1.9" (2.7σ) from the afterglow position.

Abstract Copyright: ∼

Journal keyword(s): gamma rays: bursts - techniques: photometric - cosmology: observations

Simbad objects: 5

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Number of rows : 5

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023	#notes
1	V* T Phe	Mi*	00 30 26.2337742744	-46 24 33.379722396		12.46	11.43	12.43		M7e	70	0
2	GRB 001007	gB	04 05 54.3	-21 53 46						~	18	0
3	RL 149	HS*	07 24 14.3741784768	-00 33 04.165016904	12.958	13.737	13.866	13.906	13.974	sdB	112	0
4	GRB 990510	gB	13 38 07.64	-80 29 48.8						~	482	1
5	GRB 980519	gB	23 22 21.5	+77 15 43						~	197	0

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