NOAO >   Observing Info >   Approved Programs >   2012A-0419

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Proposal Information for 2012A-0419


PI: Armin Rest, Space Telescope Science Institute, arest@stsci.edu
Address: 3700 San Martin Dr., Baltimore, MD 21218, USA

CoI: Federica Bianco, LCOGT
CoI: Ryan Chornock, Harvard/CfA
CoI: Ryan Foley, Harvard/CfA
CoI: Thomas Matheson, NOAO
CoI: Brittany McDonald, McMaster University
CoI: Knut Olsen, NOAO
CoI: Jose Luis Prieto, Princeton University
CoI: Brendan Sinnott, McMaster University
CoI: Nathan Smith, Steward Observatory
CoI: Doug Welch, McMaster University

Title: Light Echoes of Galactic Explosions and Eruptions

Abstract: We propose to search for light echoes (LEs) from the historical brightening of the Luminous Blue Variable (LBV) P Cygni using the KPNO 4m Mosaic 1.1 imager. We also propose to conclude our search - so far unsuccessful - for light echoes from the the Crab supernova SN 1054 by surveying one remaining region of the light echo ellipsoid behind the plane of the SN remnant in the sky. Recently, we discovered light echoes of the mid-19th-century Great Eruption of \eta Carinae using CTIO 4m Mosaic images. Subsequent spectroscopic follow-up revealed that its outburst spectral type was most similar to those of G-type supergiants, rather than reported LBV outburst spectral types of F-type (or earlier) \citeRest11_eta. Our extension of LE techniques to LBV outbursts promises to extend our ability to record outburst activity hundreds of years into the past - a timescale which is likely a significant fraction of the brief final phases of these probable core-collapse supernova precursors.


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