SUMMARY OF PROPOSAL 42152
DR. SMITA MATHUR
SMITHSONIAN ASTROPHYSICAL OBSERVATORY
MA USA 02138
CAMBRIDGE
60 GARDEN ST., MS-4

  E-mail: SMITA@CFA.HARVARD.EDU	Tel: (617)495-7243	Fax: (617)495-7356
  Medium: 2GBDAT

Subject: AGN                                                         
  Title: IONIZED ABSORBERS IN AGN                                                        


Abstract:
 We propose to observe with ASCA three quasars (PKS2251+113, PHL909, and PG0043+039 )
 in which we expect to detect ionized ("warm") absorbers. All the three objects show
 evidence of absorption in their ultraviolet spectra. The EINSTEIN spectra of the two
 (PKS2251+113 and PHL909) are consistent with having excess absorption at the source,
 while PG0043+039 has never been observed in X-rays. The constraints provided by both
 the X-ray and UV data will provide a powerful tool to study the physical, conditions in the absorbing gas.

 Co-Is:
   1  DR. MARTIN ELVIS    	SAO                           USA       
      ELVIS@CFA.HARVARD.EDU	(617)495-7442
   2  DR. FABRIZIO FIORE  	SAO                           USA       
   3  DR. BELINDA WILKES  	SAO                           USA       


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
PKS2251+113            0  343.5417    1.0606    30   N   Y   P  0.05000   1 
          
PHL909                 0   14.2875   14.7697    20   N   Y   P  0.15000   1 
          
PG 0043+039            0   11.4458    4.1734    30   N   Y   P  0.03600   1