SUMMARY OF PROPOSAL 43010
DR. SALVATORE SERIO
ISTITUTO ED OSSERVATORIO ASTRONOMICO "G.S. VAIANA"
 ITALY I-90134
PALERMO
PIAZZA DEL PARLAMENTO 1

  E-mail: SERIO@OAPA.ASTROPA.UNIPA.IT	Tel: +39-91-233111	Fax: +39-91-6517292
  Medium: 4GBDAT

Subject: STARS                                                       
  Title: THE THERMAL STRUCTURE OF DME STARS' CORONAE                                     


Abstract:
 We propose to observe YZ CMi and two other single dMe stars with the SIS. Previous
 X-ray spectra for this class of stars were fitted with two-temperature models,
 suggesting thermally-structured coronae. The SIS observations will clarify many
 details of the emission, for instance if it is dominated by plasma in discrete
 temperature intervals, or if it can be described by a more realistic model of
 solar-type coronal structures (loops). While an hydrostatic loop model spectrum fits the available

 Co-Is:
   1  ANTONIO MAGGIO      	OSS. ASTRON. PALERMO          ITALY     
      MAGGIO@OAPA.ASTROPA.UNIPA.IT	+39-91-233250
   2  GIOVANNI PERES      	IST. ASTR. PALERMO U          ITALY     
   3  FRANCESCO DAMIANI   	OSS. ASTRON. PALERMO          ITALY     
   4  M. ITOH             	ISAS                          JAPAN     


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
YZ CMI                 3  116.1792    3.5617    40   N   Y   P  0.35000   1