Free Access
Issue
Astron. Astrophys. Suppl. Ser.
Volume 138, Number 3, September 1999
Gamma-Ray Bursts in the Afterglow Era Contents Rome, November 3-6, 1998
Page(s) 461 - 462
DOI https://doi.org/10.1051/aas:1999309
Published online 15 September 1999
DOI: 10.1051/aas:1999309



Astron. Astrophys. Suppl. Ser. 138, 461-462 [*]

J. Hjorth1 - H. Pedersen1 - A.O. Jaunsen2 - M.I. Andersen3

Send offprint request: J. Hjorth; jens@astro.ku.dk


1 - Astronomical Observatory, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen Ø, Denmark
2 - Institute of Theoretical Astrophysics, University of Oslo, Blindern, N-0315 Oslo, Norway
3 - Nordic Optical Telescope, Ap. 474, St. Cruz de La Palma, E-38700 Canarias, Spain


Received December 29, 1998; accepted April 21, 1999

Abstract:

Using the 2.56-m Nordic Optical Telescope (NOT) on La Palma we have observed most of the known optical afterglows to gamma-ray bursts (GRBs). We here briefly report on the discoveries of the optical afterglows of two recent SAX GRBs (GRB 980519 and GRB 980613) and the detection of their host galaxies. GRB 980519 was bright upon discovery ($R\approx20$) and occurred in a faint ($R\approx26$) galaxy whereas GRB 980613 was faint upon discovery ($R\approx23$) but occurred in a bright galaxy ($R\approx23$). Both host galaxies may show signs of interaction. GRB 980519 led to the earliest reported optical identification to date. We describe our continued efforts to produce optical identifications soon after optical observations have begun.

Key words: cosmology: observations -- gamma-rays: bursts

Copyright The European Southern Observatory (ESO)

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.