A Misaligned Relativistic Jet in SN 2007gr?


The most powerful supernovae Ib/c are believed to be connected to long duration gamma-ray burst events. Although there were clear associations between three gamma bursts and type Ib/c supernovae, not all long duration gamma bursts were related to supernovae, and not all type Ib/c supernovae have an associated GRB. It has been proposed that some of the orphan type Ib/c supernovae produce relativistic GRB jets, that are not oriented within our line of sight, explaining the lack of an observable gamma-ray burst. So far this idea has never been confirmed. We propose follow-up EVN+GBT observations of the recent SN 2007gr, which was successfully detected in an e-VLBI experiment on 6-7 September 2007. The distance of the source is only 7.3 Mpc, the closest ever radio-detected type Ib/c supernova, which makes it an ideal case to study the supernova-GRB connection.

Name Other * Institution Email Phone
Zolt Paragi PI FOMI Satellite Geodetic Observ 3627310980
Chryssa Kouveliotou MSFC/NASA 256-544-7711
Mike Garrett JIVE 31-521-596511
Enrico Ramirez-Ruiz IAS, Princeton
Huib van Langevelde Joint Institute for VLBI in Eu 31-521-596515
Arpad Szomoru Joint Institute for VLBI in Eu +31 (0)521 596 513
Megan Argo Manchester
* PI = Principal Investigator; CO = Contact author; T = Thesis observations; S = Student

Front Ends
Gregorian C(3.95 to 5.85 GHz)

Back Ends
Mark 5 recorder (disks)

Type of Observing
Monitor Very Long Baseline Interferometry

Switching Type

Processor (correlator)

Allotted time 14.00 hours

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Updated 10/11/2007