Support ATel At Patreon

[ Previous | Next | ADS ]

Radio Observations of SN2005bf

ATel #621; A. M. Soderberg, S. R. Kulkarni (Caltech) and D. A. Frail (NRAO)
on 6 Oct 2005; 20:28 UT
Credential Certification: Alicia M. Soderberg (ams@astro.caltech.edu)

Subjects: Radio, Supernovae

We report on our monitoring of the Type Ibc supernova SN2005bf (IAUC 8507 ) with the Very Large Array between 2005 Apr 13 and Oct 6 UT. No radio emission is detected from the SN in any of our observations. At 8.46 GHz we place 2-sigma limits of 0.11 and 0.19 mJy for our first and last epochs (t ~ 20 and 200 days after the explosion), respectively. At a distance of 81 Mpc, these limits imply that SN2005bf was at least a factor of 100 less luminous than radio bright SN1998bw on a comparable timescale. Using the limit from our first epoch, we constrain the energy coupled to (on-axis) relativistic ejecta to be less than 5e+45 erg. Our later epochs reveal no evidence for an off-axis GRB jet component as proposed by Folatelli et al. (astro-ph/0509731).