SUMMARY OF PROPOSAL 41207
DR. KOUJI OHTA
KYOTO UNIVERSITY
KYOTO JAPAN 606-01
KYOTO
OIWAKE-CHO KITASHIRAKAWA SAKYO-KU

  E-mail: OHTA@KUSASTRO.KYOTO-U.AC.JP	Tel: 075-753-3896	Fax: 075-753-3897
  Medium: 4GBDAT

Subject: AGN                                                         
  Title: ASCA OBSERVATION OF A TYPE-2 QSO RDJ12434+0001 AT Z                             


Abstract:
 RD J13434+0001 is a Type-2 QSO at Z=2.35 discovered by Almanini et al. in the course
 of their optical identification of the X-ray source survey with ROSAT. It has X-ray
 luminosity (0.4-6.7 keV at rest) more than 10^45 erg/s, as luminous as to be
 classified to QSO, and show no UV broad emisiion lines. This is the one and only one
 example of X-ray luminous Type-2 QSO at such high redhisft (larger than 2) and thus
 potentially very important object which should be observed with ASCA at more higher
 energy range (at 2-35 keV at rest). The results constrain this object is a heavily
 absorved QSO or "naked QSO" without any broad-line region, and give many impacts in
 searching for type-2 QSO at high redshift and in understanding the origin of Cosmic X-ray Background.

 Co-Is:
   1  TORU YAMADA         	RIKEN                         JAPAN     
      YAMADA@CRICKET.RIKEN.GO.JP	048-462-1111 (3227)
   2  CHIKO OHTANI        	RIKEN                         JAPAN     
   3  MASSIMO CAPPI       	RIKEN                         JAPAN     


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
RD J13434+0001         1  205.8708    0.0258    100   N   N   P  0.01000   1