????:1????????:?????????

2?????????

3???v???

4????????95?98

5??????????????

“??,??????????”,????????,????17??????,???“????????????”(?????????????????EP)????X?????????,???X?????,??X?????,?EP???????????“??”X?????(FXT)??????????????,??X????

EP??(??????????????????????????????)????????,?????????????,????????????????????????????“???”????EP????,????

“?????????????”?????????????????????,???????X??????X??????????,??X????,?????X????????????????????,?????,????????????X???,????????????????,???X??????????,?????????????????

????,??357400?????,???,?????14%,??????????,???????“??????????????????????????????”,??????,???,???????????????????,?????????X??,?,?????????X???

??,????,?????????????????????ROSAT??????Chandra,????“??????”??????????????????????????????X???????????,???X???,????????X?????,“????”?????,????“????????????????”????????????,“???????????”????????X????????????,??????????????????????????????????????????????????

??????????????????,???EP????,????X?EP????????????????????????“?????????????”?????????????X??????????????????,????????

(?? ???? ?????? ??????????????) ?????:???????