Bibcode
Pereyra, A.; Magalhães, A. M.
Bibliographical reference
Astronomy and Astrophysics, Volume 432, Issue 2, March III 2005, pp.L53-L55
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3
2005
Journal
Citations
2
Refereed citations
2
Description
We report R band imaging polarimetry of SN 2004bv in NGC 6907 on June
19.299 (UT middle of observation), i.e., two weeks after maximum. We
have obtained [ 0.11 ± 0.02] % at position angle 118.7 ° for
the observed polarization. The average foreground polarization from
field objects was estimated to be [ 0.12 ± 0.02] % at PA 163.4
°, consistent with the low reddening towards the SN. Spectroscopy
reported elsewhere does not show the Na I D line in the SN spectrum
suggesting that the interstellar polarization in the host galaxy is
negligible. If this is the case, the data are consistent with SN 2004bv
being close to spherically symmetric. The estimated R magnitude at the
time of the observations was 14.5 mag. An upper limit to the SN H
magnitude on June 20.259 (UT) was 13.9 mag. The role that small and
medium-sized telescopes may play in studying the symmetry and time
evolution of SN explosions is pointed out.
Based on observations obtained at the Observatório do Pico dos
Dias, LNA/MCT, Itajubá, Brazil.