Near-infrared detection and optical follow-up of the GRB990705 afterglow
| dc.creator | Masetti, N. | |
| dc.date | 1999-12-20 | |
| dc.date.accessioned | 2026-07-07T02:35:07Z | |
| dc.date.available | 2026-07-07T02:35:07Z | |
| dc.description | Optical and near-infrared observations of the GRB990705 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 alpha ~ 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 GRB990705. | |
| dc.description | 7 pages, 3 figures, 1 table, accepted for publication on Astronomy & Astrophysics, Main Journal | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9912423 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9912423 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/15497 | |
| dc.subject | Astrophysics | |
| dc.title | Near-infrared detection and optical follow-up of the GRB990705 afterglow | |
| dc.type | text |