SUMMARY OF PROPOSAL 42080
DR. DAVID NELSON BURROWS
PENNSYLVANIA STATE UNIVERSITY
PA USA 16802
UNIVERSITY PARK
525 DAVEY LAB

  E-mail: BURROWS@ASTRO.PSU.EDU	Tel: (814) 863-2466	Fax: (814) 863-3399
  Medium: 2GBDAT

Subject: SUPERNOVA REMNANTS AND GALACTIC DIFFUSE EMISSION            
  Title: ASCA OBSERVATION OF THE SNR 3C400.2                                             


Abstract:
 The unusual morphology of the supernova remnant 3C400.2 suggests that it may consist
 of a SNR re-energizing an existing cavity created by an earlier SNR. High resolution
 radio images show two interacting shells, while the Einstein IPC and the ROSAT PSPC
 images reveal X-ray emission from the entire interior of the two remnants, with a
 peak near their interaction. Optical images also exhibit enhanced emission in this
 area. ASCA SIS observations of 3C400.2 will provide information on temperature
 variation, ionization state and elementary abundances, and assist to explain the
 unusual morphology of the SNR. 3C400.2 was observed in AO3 with 4CCD mode, but was
 out of the field of view because of a pointing error. Here we are proposing another ASCA observation of 3C400.2 with 2CCD mode.

 Co-Is:
   1  ZHIYU GUO           	PENN STATE                    USA       
      WINKLER@MIDD.CC.MIDDLEBURY.EDU	(802) 388-3711 X5426
   2  FRANK WINKLER       	MIDDLEBURY COLLEGE            USA       
   3  GLORIA DUBNER       	INSTITUTO DE ASTRONO          ARGENTINA 


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
3C400.2                0  294.6300   17.2936    30   N   N   P  0.47000   1 

REMARKS:  USE 2CCD BRIGHT MODE AT MEDIUM BIT RATE FOR REMOTE ORBITS; 2CCD FAINT MODE
          AT HIGH BIT RATE FOR CONTACT ORBITS. REQUEST A ROLL ANGLE OF 200 DEGREES
          TO MAKE BEST USE OF THE 2CCD COVERAGE.