Chandra Observations of the ultra-dark GRB 100615A

Details Chandra Observations of the ultra-dark GRB 100615A Chandra Observations of the ultra-dark GRB 100615A

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cxo..prop.3016l&link_type=abstract

Chandra proposal ID #11508347

Computer Science

Scientific paper

A fraction of gamma-ray bursts are dark in the optical and even in the nIR. These can be localised only using X-ray afterglows. This sample probably includes bursts in highly obscured, extreme star forming regions, and may originate in decidedly different environments from optically bright bursts. Unfortunately, Swift X-ray positions are not sufficiently precise to allow unambiguous identification of the host galaxies, while sub-arcsecond positions from Chandra do allow for this identification. With position in hand we can search for the host galaxy, study its luminosity and morphology, obtain its redshift and measure the location of the burst upon it -- these observations can then be compared to those of optically bright bursts to derive meaningful constraints on the burst environment. All of this subsequent science is enabled by a modest (15 ks) Chandra observation.

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