SUMMARY OF PROPOSAL 41134
MS NORIKO Y. YAMASAKI
TOKYO METROPOLITAN UNIV.
TOKYO JAPAN 192-03
HACHIOJI CITY
1-1 MINAMI-OSAWA

  E-mail: YAMASAKI@PHYS.METRO-U.AC.JP	Tel: +81-426-77-1111 EXT.3257	Fax: +81-426-77-2483
  Medium: 4GBDAT

Subject: AGN                                                         
  Title: X-RAY GUNN-PETERSON TEST USING 4C06.41                                          


Abstract:
 To measure the ionized inter-galactic medium in the universe, we propose a X-ray
 Gunn-Peterson test using QSO 4C06.41. A Lyman limit system with neutral hydrogen
 column density 1e17 cm^-2 was found by HST in this QSO. The ionized hydrogen column
 density is expected to be 1e23 cm^-2. The purpose of this observation is to detect
 the absorption structure made by neutral heavy elements in the inter-galactic medium
 and to determine the baryon mass in the universe.

 Co-Is:
   1  TAKAYA OHASHI       	TOKYO METRO. UNIV.            JAPAN     
      (No Co-I contact data)
   2  FUMIO TAKAHARA      	TOKYO METRO. UNIV.            JAPAN     


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
4C06.41                2  160.3217    6.1714    100   N   N   P  0.06000   1