HOW UNUSUAL IS XRF 060218?

Could the GRB - Supernovae GRB 031203 and XRF 060218 be Cosmic Twins ?

The gamma-ray burst (GRB) / X-ray flash (XRF) events GRB031203, discovered by INTEGRAL, and XRF 060218, discovered by Swift, represent two of only five GRB-SNe with optical spectroscopic confirmation of their SN components. Yet their observed high-energy properties offer a sharp contrast: While GRB031203 was detected as a short 40-s burst with a spectrum peaking at Epeak > 190 keV, XRF060218 wa...

Infrared Observations of SN 2006 aj , the Supernova Associated with XRF 060218 - Paper I

We report simultaneous multicolor near-infrared (NIR) observations of the supernova associated with x-ray Flash 060218 during the first 16 days after the high energy event. We find that the light curve rises and peaks relatively fast compared to other SN Ic, with the characteristic broad NIR peak seen in all three bands. We find that the rise profile before the peak is largely independent of NI...

Multicolor Infrared Observations of SN 2006 aj , the Supernova Associated with XRF 060218 - Paper I

We report simultaneous multicolor near-infrared (NIR) observations of the supernova associated with x-ray Flash 060218 during the first 16 days after the high energy event. We find that the light curve rises and peaks relatively fast compared to other SN Ic, with the characteristic broad NIR peak seen in all three bands. We find that the rise profile before the peak is largely independent of NI...

Sn 2006aj Associated with Xrf 060218 at Late Phases: Nucleosynthesis-signature of a Neutron Star-driven Explosion

Optical spectroscopy and photometry of SN 2006aj have been performed with the Subaru telescope at t > 200 days after GRB060218, the X-ray Flash with which it was associated. Strong nebular emission-lines with an expansion velocity of v ∼ 7, 300 km s were detected. The peaked but relatively broad [OI]λλ6300, 6363 suggests the existence of ∼ 2M⊙ of materials in which ∼ 1.3M⊙ is oxygen. The core m...

How is the Mother Tongue Acquired