Strongly Variable Absorption Lines Along the Line-of-Sight to a Gamma-Ray Burst

Details Strongly Variable Absorption Lines Along the Line-of-Sight to a Gamma-Ray Burst Strongly Variable Absorption Lines Along the Line-of-Sight to a Gamma-Ray Burst

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..937..469g&link_type=abstract

SUPERNOVA 1987A: 20 YEARS AFTER: Supernovae and Gamma-Ray Bursters. AIP Conference Proceedings, Volume 937, pp. 469-473 (2007).

Astronomy and Astrophysics

Astronomy

Astronomical Observations, Gamma-Ray Sources, Gamma-Ray Bursts, Spectroscopy And Spectrophotometry

Scientific paper

Quick response to the bright afterglow of GRB 060206 permitted four hours of time-resolved spectroscopy to be obtained with the FLWO 1.5-m Tillinghast telescope. The spectra show the presence of three absorption systems at z = 4.05, 3.54 and 1.48 with the redshift of the burst probably coincident with the damped Lyman-α system at z = 4.05. The time-series of spectra reveal variations in the absorption line strengths of Mg II and Fe II in the system at z = 1.48. This is the first detection of significant variability in a an intervening absorption system and this observation has important implications for the understanding of the distribution of cloud sizes and the difference between QSO and GRB absorption line characteristics.

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