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

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 languageEnglish (US)
Pages (from-to)135-142
Number of pages8
JournalAstrophysical Journal
Issue number1 I
StatePublished - Apr 10 2003

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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