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Sloan digital sky survey multicolor observations of GRB 010222

  • Brian C. Lee
  • , Douglas L. Tucker
  • , Daniel E. Vanden Berk
  • , Brian Yanny
  • , Daniel E. Reichart
  • , Jennifer Adelman
  • , Bing Chen
  • , Mike Harvanek
  • , Arne Henden
  • , Željko Ivezić
  • , Scot Kleinman
  • , Don Lamb
  • , Dan Long
  • , Russet Mcmillan
  • , Peter R. Newman
  • , Atsuko Nitta
  • , Povilas Palunas
  • , Donald P. Schneider
  • , Steph Snedden
  • , Don York
  • John W. Briggs, J. Brinkmann, Istvan Csabai, Greg S. Hennessy, Stephen Kent, Robert Lupton, Heidi Jo Newberg, Chris Stoughton

Research output: Contribution to journalArticlepeer-review

Abstract

The discovery of an optical counterpart to GRB 010222 (detected by BeppoSAX) was announced 4.4 hr after the burst by Henden. The Sloan Digital Sky Survey's 0.5 m photometric telescope (PT) and 2.5 m survey telescope were used to observe the afterglow of GRB 010222 starting 4.8 hr after the gamma-ray burst. The 0.5 m PT observed the afterglow in five 300 s g*-band exposures over the course of half an hour, measuring a temporal decay rate in this short period of Fv ∝ t-1±0.5. The 2.5 m camera imaged the counterpart nearly simultaneously in five filters (u*, g*, r*, i*, z*), with r* = 18.74 ± 0.02 at 12:10 UT. These multicolor observations, corrected for reddening and the afterglow's temporal decay, are well-fitted by the power law Fv ∝ v-0.90±0.03 with the exception of the u*-band UV flux which is 20% below this slope. We examine possible interpretations of this spectral shape, including source extinction in a star-forming region.

Original languageEnglish (US)
Pages (from-to)183-188
Number of pages6
JournalAstrophysical Journal
Volume561
Issue number1 PART 1
DOIs
StatePublished - Nov 1 2001

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Gamma rays: bursts

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