2MASS J05094262-7207411 , the SIMBAD biblio

2000A&A...354..473M - Astronomy and Astrophysics, volume 354473-479 (2000/2-2)

Near-infrared detection and optical follow-up of the GRB 990705 afterglow.

MASETTI N., PALAZZI E., PIAN E., HUNT L.K., MENDEZ M., FRONTERA F., AMATI L., VREESWIJK P.M., ROL E., GALAMA T.J., VAN PARADIJS J., ANTONELLI L.A., NICASTRO L., FEROCI M., MARCONI G., PIRO L., COSTA E., KOUVELIOTOU C., CASTRO-TIRADO A.J., FALOMO R., AUGUSTEIJN T., BOEHNHARDT H., LIDMAN C., VANZI L., MERRILL K.M., KAMINSKY C.D., VAN DER KLIS M., HEEMSKERK M.H.M., VAN DER HOOFT F., KUULKERS E., PEDERSEN H. and BENETTI S.

Abstract (from CDS):

Optical and near-infrared observations of the GRB 990705 error box were carried out with ESO telescopes at La Silla and Paranal in Chile and with the NOAO SPIREX 0.6-meter telescope in Antarctica. We detected the counterpart of this GRB in the near-infrared H band and optical V band. The power-law decline of the near-infrared lightcurve is rather steep with a decay index α≃1.7 in the first hours, and a possible steepening after one day. Broadband spectral analysis of the optical/near-infrared afterglow suggests that this GRB took place in a high density environment. A deep optical image obtained at Antu (VLT-UT1) about 5 days after the GRB trigger shows at the position of the transient an extended object which might be the host galaxy of GRB 990705.

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Journal keyword(s): gamma rays: bursts - radiation mechanisms: non-thermal - galaxies: general

Simbad objects: 13

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