Physics
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006noao.prop..301s&link_type=abstract
NOAO Proposal ID #2006B-0301
Physics
Scientific paper
Our SuperMACHO collaboration has discovered echoes from four ancient supernovae in the Large Magellanic Cloud. The echoes were discovered using our SuperMACHO MOSAIC data difference images. The echo motions point to three supernova remnants which are listed as three of the six youngest SNRs in the LMC. These three remnants are also identified as Type Ia events, based on the X-ray spectral abundances. We have dated these echoes at 400-800 years. The echoes are easy to detect - they are as bright as 22 mag arcsec^-2, generally superluminal, a few arc- seconds wide, and tens of arc-seconds across. We are asking for NOAO time to get images of regions of significant dust concentration near the Galactic SNe Crab/1054, Tycho (4+3n KPNO 4m) and Kepler, Lupus/1006 (4n CTIO 4m). These supernovae are the youngest and/or brightest. By obtaining these images, we will be able to search for echoes in the second epoch images and have the first epoch images for a run next semester. Our group, which pioneered the discovery of echoes, will be at a great advantage for finding these echoes first if we can get these images this observing season. Finding echoes from historical supernovae and typeing them with spectra will be a major discovery for the NOAO 4m telescopes.
Becker Andy
Bergmann Marcel
Clocchiatti Alejandro
Cook Kem
Garg Arti
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