Optical polarimetry of GRB030329

Details Optical polarimetry of GRB030329 Optical polarimetry of GRB030329

Aug 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003basbr..23..232m&link_type=abstract

Boletim da Sociedade Astronômica Brasileira (ISSN 0101-3440), vol.23, no.1, p. 232-232

Astronomy and Astrophysics

Astronomy

Scientific paper

We have obtained R band imaging polarimetry of GRB030329. The observation was performed with the IAGPOL double-beam imaging polarimeter and the IAG-USP 60cm telescope, at the Laboratório Nacional de Astrofísica. The observation spanned the period UT 01: 06 to 01: 51 on 31 March, 1.519 - 1.592 days after the event. We have measured the following linear polarization for GRB030329: P = [1.97 +/- 0.48]%, position angle = 83 degrees. We have obtained much smaller polarization for field objects, consistent with the low foreground reddening towards the field. Independent data suggest that dilution of the GRB intrinsic polarization by the much fainter host galaxy should be negligible, at least at the early stages of the burst. In addition, a large polarization component within the host galaxy interstellar medium seems unlikely. We conclude that a substantial fraction of the GRB030329 polarization is intrisic in nature. This strongly suggests that GRB030329 is non-spherically symmetric, lending further credence to the asymmetric fireball scenario for GRBs. This work is supported by FAPESP. AMM is partly supported by CNPq.

Affiliated with

Also associated with

No associations

Rating

Optical polarimetry of GRB030329 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Optical polarimetry of GRB030329, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical polarimetry of GRB030329 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1666058