SUMMARY OF PROPOSAL 42084
DR. OLAF VANCURA
SMITHSONIAN ASTROPHYSICAL OBSERVATORY
MA USA 02138
CAMBRIDGE
60 GARDEN ST.

  E-mail: VANCURA@CFA.HARVARD.EDU	Tel: 617-496-7721	Fax: 617-495-7356
  Medium: 2GBDAT

Subject: SUPERNOVA REMNANTS AND GALACTIC DIFFUSE EMISSION            
  Title: AN X-RAY STUDY OF THE EVOLUTION OF THE CTB1 SNR                                 


Abstract:
 We propose to use ASCA to study the evolution of the CTB1 supernova remnant. The
 existing ROSAT PSPC data are insufficient, and we are concerned that the
 conventional Sedov-phase interpretation is incomplete. In particular, the optical
 and radio data suggest that the blast wave may recently have encountered a cavity
 wall, and the X-ray images show a center-filled morphology with a possible break-out
 region to the northeast. We will fit the ASCA data with predictions from our dusty
 shock wave code to determine physical parameters from the western and northeastern
 regions of the remnant. These will be used to determine the evolutionary epoch of CTB1.

 Co-Is:
   1  DR. PATRICK SLANE   	SAO                           USA       
      (No Co-I contact data)
   2  DR. JACK HUGHES     	SAO                           USA       


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
CTB1 - WEST            0  359.5000   62.4167    60   N   N   P  0.30000   1 

REMARKS:           PI FOR EXPLICIT POINTING INFORMATION.
CTB1 - NE              0    0.2500   62.7500    40   N   N   P  0.30000   1 

REMARKS:           PI FOR EXPLICIT POINTING INFORMATION.