NOAO >   Observing Info >   Approved Programs >   2007B-0332

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Proposal Information for 2007B-0332


PI: Armin Rest, NOAO, arest@ctio.noao.edu
Address: CTIO, Colina El Pino S/N, La Serena, Chile

CoI: R. Chris Smith, NOAO
CoI: Nicholas B. Suntzeff, Texas A & M University
CoI: Douglas Welch, McMaster University
CoI: Christopher Stubbs, Harvard/CfA
CoI: Arti Garg, Harvard/CfA
CoI: Pete Challis, Harvard/CfA
CoI: Michael Wood-Vasey, Harvard/CfA
CoI: Guillermo Damke, CTIO
CoI: Andrew Newman, WA
CoI: Knut Olsen, NOAO
CoI: Alejandro Clocchiatti, PUC
CoI: Dante Minniti, PUC
CoI: Lorenzo Morelli, PUC
CoI: Kem Cook, NOAO and LLN
CoI: Mark Huber, LLNL
CoI: Sergei Nikolaev, LLNL
CoI: J.L. Prieto, OSU
CoI: Andy Becker, FNAL

Title: Echoes of Historical Supernovae in the Milky Way Galaxy

Abstract: We propose to search for echoes of the original light from historic Galactic supernovae (SNe) to enable follow-up spectroscopy and determine the nature and properties of the closest examples of these important events. The SuperMACHO collaboration recently discovered echoes from three ancient SNe in the Large Magellanic Cloud. The echo motions can be traced back to three of the youngest supernova remnants (SNRs) in the LMC. These three remnants have also been identified as Type Ia events, based on the X-ray spectral abundances. We have dated these echoes to events 400-800 years ago, and we have obtained spectroscopy of the echo light, showing at least in one case the event to be unambiguously a Type Ia SN . We have realized that the opportunity represented by the study of echoes from historical SNe is even more fascinating for Galactic SNe, providing the possibility of getting spectroscopy of historical SNe such as Tycho's, Kepler's, SN1006, and others. In previously granted NOAO time, we began to obtain images of regions of significant dust concentration near these Galactic SNRs. We have obtained first epoch and some second epoch images for Tycho, Cas A, 3C 58, and Crab Nebula in the northern sky. Unfortunately, due to bad weather conditions we observed only 1 out of 4 second epoch nights, thus we need additional observations to obtain the necessary second epoch images in order to discover and study echoes of these important Galactic SNe, and confirm the possible detection of light echo complexes detected in the previous runs.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



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