AAS 201st Meeting, January, 2003
Session 138. X-Ray Observations of Quasars and AGNs
Oral, Thursday, January 9, 2003, 2:00-3:30pm, 616-617

## [138.04] A \emph{Chandra} Search for an X-ray Jet in the z=3.572 Quasar PKS 2215+020

D.A. Schwartz (Harvard-Smithsonian CfA)

We have searched for X-ray jets in the quasar PKS 2215+020. We anticipate such jets on kpc scales at large redshift due to the enhancement of the CMB energy density by the factor (1+z)4, (Schwartz 2002, ApJ(Lett), 569, L23). In this particular object, Lobanov et al. (2001, ApJ, 547, 714) have noted a slight, although not statistically significant, offset of both the ROSAT position and HRI contours in the direction of a 7'' VLA structure. Our \emph{Chandra} ACIS-S 27 ksec observation shows no sign of X-ray extension on 3 to 10 arcsec scales, with an upper limit of 0.34 nJy. We detect the quasar core with a flux density of 19 nJy at 1 keV. By comparing to the synchrotron self-Compton (SSC) emission expected from the VLBI structures observed by Lobanov et al., we can deduce a relativistic beaming factor \delta = 1/(\Gamma(1-\beta \cos \theta))=1.5. We expect that this SSC emission is responsible for the extreme value of \alphaox=0.9 reported by Seibert and Brinkmann (1998, AA, 333, 63). The pc scale jet may be at a relatively large angle to our line of sight (as suggested in Lobanov) and/or bending away from our line of sight so that we do not see beamed X-ray emission from the jet.

This work was supported by NASA contract NAS8-39073 to the \emph{Chandra} X-ray Center.