SUMMARY OF PROPOSAL 62085
NASA/GSFC
CODE 662, GODDARD SPACE FLIGHT CENTER
GREENBELT
MD USA 20771
Tel: (301) 286-3844 Fax: (301) 286-1684
Medium: CD ROM
Subject: SUPERNOVA REMNANTS AND GALACTIC DIFFUSE EMISSION
CHARACTERIZING THE HARD SPECTRAL COMPONENTS IN LMC SUPERNOVA REMNANTS
ABSTRACT
We have searched all ASCA spectra of LMC SNRs for evidence of a nonthermal tail. Such a tail could arise from electrons accelerated within the shock to highly relativistic energy, and thus indicate cosmic ray creation. All SNRs with diameters <13 pc have hard components. Most of the observations are brief (~20ks), so characterizing the spectral form or placing a strong limit on a nonthermal contribution is difficult. A search for nonthermal emission is further complicated by the presence in some SNR's of an Fe K line, indicating a hard thermal component. We propose deep observations of 4 bright LMC SNRs, 0509-67.5, 0519-69.0, N23 and N63A, which will allow us to meaningfully compare the nonthermal luminosity with that of Galactic remnants (even in the presence of a hot thermal component).
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| JONATHAN KEOHANE | GSFC/U.MINN | USA |
| UNA HWANG | GSFC/U.MD. | USA |
| ERIC GOTTHELF | GSFC/USRA | USA |
| GLENN ALLEN | GSFC | USA |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)0509-67.5 | 2 | 77.3829 | -67.5209 | 100 ks | N | Y | P | 0.20000 | 1 |