Vol. 4 (10) pp. 1519-1522 DOI: 10.21474/IJAR01/1958

020819 AND 021211: TWO DARK GRBS.

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  • Mohanlal sukhadia university, Udaipur, Rajasthan, India.
  • Pacific University, Udaipur, Rajasthan India.
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Abstract

Context:- Dark gamma-ray bursts (GRBs) are sources with a low optical-to-X-ray flux ratio ?ox = 0.5. Proposed explanations for this darkness are: a) the GRB is at high redshift b) dust in the GRB host galaxy absorbs the optical/NIR flux c) GRBs have an intrinsically faint afterglow emission. Aims:- We study two dark GRBs, namely, GRB020819 and GRB021211. These sources are bright in the X-rays, but no optical/NIR afterglow has been detected for either source, despite the efforts of several follow-up campaigns that have been performed soon after the GRB explosion. Method:- We will analysis host properties and reason behind the darkness from the literature. Conclusion:- High redshift and dust extinction can be a reason behind the darkness of GRBs, but deeper and faster observations can make us to find optical afterglows

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How to Cite This Article

Veena Motwani1, SNA Jaffery and Yashpal Bhulla. (2016); 020819 AND 021211: TWO DARK GRBS., Int. J. of Adv. Res., 4 (10), 1519-1522, ISSN 2320-5407. DOI: https://doi.org/10.21474/IJAR01/1958

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Veena Motwani

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