Hubble space telescope and ground-based optical and ultraviolet observations of GRB 010222

T. J. Galama*, D. Reichart, T. M. Brown, R. A. Kimble, P. A. Price, E. Berger, D. A. Frail, S. R. Kulkarni, S. A. Yost, A. Gal-Yam, J. S. Bloom, F. A. Harrison, R. Sari, D. Fox, S. G. Djorgovski

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


We report on Hubble Space Telescope (AST) Wide Field Planetary Camera 2 optical and Space Telescope Imaging Spectrograph (STIS) near-ultraviolet MAMA observations and ground-based optical observations of GRB 010222, spanning 15 hr to 71 days. The observations are well described by a relativistic blast wave model with a hard electron energy distribution, p = 1.57-0.03 +0.04, and a jet transition at t* = 0.93-0.06 +0.15 days. These values are slightly larger than previously found as a result of a correction for the contribution from the host galaxy to the late-time ground-based observations and the larger temporal baseline provided by the HST observations. The host galaxy is found to contain a very compact core (size >0.″25), which coincides with the position of the optical transient. The STIS near-ultraviolet MAMA observations allow for an investigation of the extinction properties along the line of sight to GRB 010222. We find that the far-ultraviolet curvature component c4 is rather large. In combination with the low optical extinction, Av = 0.110-0.021+0.010 mag, when compared with the hydrogen column inferred from X-ray observations, we suggest that this is evidence for dust destruction.

Original languageAmerican English
Pages (from-to)135-142
Number of pages8
JournalAstrophysical Journal
Issue number1 I
StatePublished - 10 Apr 2003
Externally publishedYes


  • Gamma rays: bursts


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