GRB afterglow studies at the Nordic Optical Telescope

Details GRB afterglow studies at the Nordic Optical Telescope GRB afterglow studies at the Nordic Optical Telescope

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26as..138..461h&link_type=abstract

Astronomy and Astrophysics Supplement, v.138, p.461-462

Astronomy and Astrophysics

Astrophysics

11

Cosmology: Observations, Gamma-Rays: Bursts

Scientific paper

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~20) and occurred in a faint (R~26) galaxy whereas GRB 980613 was faint upon discovery (R~23) but occurred in a bright galaxy (R~23). 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. Based on observations made with the Nordic Optical\protect\linebreak Telescope, operated on the island of La Palma jointly by Denmark, Finland, Iceland, Norway, and Sweden, in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias.

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