English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We have collected and analyzed data taken in different spectral bands (fromX-ray to optical and infrared) of the field of GRB031220 and we present resultsof such multiband observations. Comparison between images taken at differentepochs in the same filters did not reveal any strong variable source in thefield of this burst. X-ray analysis shows that only two of the seven Chandrasources have a significant flux decrease and seem to be the most likelyafterglow candidates. Both sources do not show the typical values of the R-Kcolour but they appear to be redder. However, only one source has an X-raydecay index (1.3 +/- 0.1) that is typical for observed afterglows. We assumethat this source is the best afterglow candidate and we estimate a redshift of1.90 +/- 0.30. Photometric analysis and redshift estimation for this objectsuggest that this GRB can be classified as a Dark Burst and that theobscuration is the result of dust extinction in the circum burst medium orinside the host galaxy.Comment: 7 pages, 5 figures, accepted for publication on A&

Multi-wavelength analysis of the field of the dark burst GRB 031220