The case for a high-redshift origin of GRB 100205A

A. A. Chrimes, A. J. Levan, E. R. Stanway, E. Berger, J. S. Bloom, S. B. Cenko, B. E. Cobb, A. Cucchiara, A. S. Fruchter, B. P. Gompertz, J. Hjorth, P. Jakobsson, J. D. Lyman, P. O’Brien, D. A. Perley, N. R. Tanvir, P. J. Wheatley, K. Wiersema

Rannsóknarafurð: Framlag til fræðitímaritsGreinritrýni


The number of long gamma-ray bursts (GRBs) known to have occurred in the distant Universe (z > 5) is small (∼15); however, these events provide a powerful way of probing star formation at the onset of galaxy evolution. In this paper, we present the case for GRB 100205A being a largely overlooked high-redshift event. While initially noted as a high-z candidate, this event and its host galaxy have not been explored in detail. By combining optical and near-infrared Gemini afterglow imaging (at t < 1.3 d since burst) with deep late-time limits on host emission from the Hubble Space Telescope, we show that the most likely scenario is that GRB 100205A arose in the range 4 < z < 8. GRB 100205A is an example of a burst whose afterglow, even at ∼1 h post burst, could only be identified by 8-m class IR observations, and suggests that such observations of all optically dark bursts may be necessary to significantly enhance the number of high-redshift GRBs known.

Upprunalegt tungumálEnska
Síður (frá-til)902-909
FræðitímaritMonthly Notices of the Royal Astronomical Society
Númer tölublaðs1
ÚtgáfustaðaÚtgefið - 1 sep. 2019


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© 2019 The Author(s).


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