SHOWING 1-10 OF 10 REFERENCES
A Scattered Light Echo around SN 1993J in M81
A light echo around SN 1993J was observed 8.2 yr after explosion by a Hubble Space Telescope Wide Field Planetary Camera 2 observation, adding to the small family of supernovae with light echoes. The…
Infrared Echoes near the Supernova Remnant Cassiopeia A
- Physics, GeologyScience
Two images of Cassiopeia A obtained at 24 micrometers with the Spitzer Space Telescope over a 1-year time interval show moving structures outside the shell of the supernova remnant to a distance of…
The Dust-scattered X-Ray Halo around Swift GRB 050724
The X-ray halo around the Swift -ray burst GRB 050724 (z 1⁄4 0:258), detected by the Swift X-Ray Telescope, expands to a radius of 20000 within 8 ks of the burst, exactly as expected for small-angle X-rays scattering by Galactic dust along the line of sight to a cosmologically distant GRB.
The Compact Central Object in Cassiopeia A: A Neutron Star with Hot Polar Caps or a Black Hole?
- PhysicsThe Astrophysical journal
The central pointlike X-ray source of the Cassiopeia A supernova remnant was discovered in the Chandra first light observation and found later in the archival ROSAT and Einstein images. The analysis…
The Cassiopeia A Supernova Was of Type IIb
The spectrum shows that Cassiopeia A was a type IIb supernova and originated from the collapse of the helium core of a red supergiant that had lost most of its hydrogen envelope before exploding.
The massive binary companion star to the progenitor of supernova 1993J
Photometric and spectroscopic observations of SN1993J ten years after the explosion detect the unambiguous signature of a massive star: the binary companion to the progenitor.
The Compact Central Object in Cas A: A Neutron Star with Hot Polar Caps or a Black Hole?
The light echoes from SN1987A
Direct imaging1,2 of supernova 1987A has revealed two semicircular arcs around the explosion site. Similar arcs around Nova Persei3,4 and Nova V732 Sagittarii5 have been explained as light echoes…