2006A&A...459L..33G


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.22CET12:16:15

2006A&A...459L..33G - Astronomy and Astrophysics, volume 459, L33-36 (2006/12-1)

Detection of optical linear polarization in the SN 2006aj/XRF 060218 non-spherical expansion.

GOROSABEL J., LARIONOV V., CASTRO-TIRADO A.J., GUZIY S., LARIONOVA L., DEL OLMO A., MARTINEZ M.A., CEPA J., CEDRES B., DE UGARTE POSTIGO A., JELINEK M., BOGDANOV O. and LLORENTE A.

Abstract (from CDS):

We have performed optical polarimetric observations of the SN 2006aj associated to the X-ray flash (XRF) of February 18, 2006, XRF 060218 that provide information on its expansion geometry. The data were acquired in the R-band with the 0.7m telescope of Crimea, 2.5m Nordic Optical Telescope and the 2.2m of Calar Alto. We report the detection of linear polarization between 3 and 39 days after the gamma-ray event (t-t0). This represents the first polarization detection of a Ic supernova (SN) associated to an XRF. Our data exhibit a degree of linear polarization (P) around P∼4% at t-t0∼3-5days, followed by a constant polarization phase with P ∼1.4% at 13.7≲t-t0≲39days. Our data suggest a decay in P, and more interestingly, show a position angle (θ) rotation of ∼100° comparing data taken before and after the R-band lightcurve peak. The reported polarization measurements can be explained by the evolution of an asymmetric SN expansion. We discuss on several ingredients that could account for the observed θ rotation.

Abstract Copyright:

Journal keyword(s): gamma rays: bursts - supernovae: general - techniques: polarimetric

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 SN 2002ap SN* 01 36 23.85 +15 45 13.2   13.11 14.54     SN.Ic-bl 483 1
2 SN 2006aj SN* 03 21 39.670 +16 52 02.27 17.96 19.11 17.40     SN.Ic-bl 808 1
3 HD 25443 * 04 06 08.0670623506 +62 06 06.620149609 6.45 6.998 6.766     B0.5III 114 0
4 BD+52 913 WD* 05 05 30.6182785658 +52 49 51.920797126 10.25 11.44 11.69 11.93 12.108 DA.8 959 0
5 SN 1987A SN* 05 35 28.020 -69 16 11.07   4.75 4.81     SN.IIPec 4385 2
6 SN 2004dj HXB 07 37 17.02 +65 35 57.8     11.2     SN.IIP 229 1
7 SN 2003dh SN* 10 44 50.030 +21 31 18.15     16.2     SN.IcPec 1097 2

    Equat.    Gal    SGal    Ecl

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2019.11.22-12:16:15

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