SUMMARY OF PROPOSAL 42168
DR. K. P. SINGH
NASA GODDARD SPACE FLIGHT CENTER
MD USA 20771
GREENBELT


  E-mail: KPS@ROSSERV.GSFC.NASA.GOV	Tel: 301 286 6699	Fax: 301 286 1681
  Medium: 4GBDAT

Subject: AGN                                                         
  Title: X-RAY SPECTROSCOPY OF A BLAZAR: PKS 1510-089                                    


Abstract:
 The blazar, PKS 1510-089, is a high polarization quasar at a redshift of 0.361. It
 is highly variable in the optical and radio continuum and polarized flux, and has a
 radio jet indicating beaming. Beamed high energy gamma-ray emission is also implied
 by its detection by EGRET. Its EXOSAT X-ray spectrum had shown a remarkably intense
 line emission at 6.4 keV (rest frame) presumably due to Fe fluorescence from an
 isotropically emitting source of X-rays. A 20 ksec ASCA observation will enable
 spectral index of its X-ray continuum to be measured accurately, and determine the
 line energy and strength thus providing clues to its origin. The study will help in
 quantifying the degree of beaming and the presence of matter around the central engine of this intriguing source.

 Co-Is:
   1  CHRIS SHRADER       	LHEA/GSFC                     USA       
      SHRADER@GROSSC.GSFC.NASA.GOV	301-286-8434
   2  IAN M. GEORGE       	LHEA/GSFC                     USA       


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
PKS 1510-089           0  228.2083   -9.1000    20   N   N   P  0.26000   1