SUMMARY OF SEQUENCE NUMBER 700151
SUMMARY OF SEQUENCE NUMBER 700151
Title: STRUCTURES AND SPECTRA OF HOT GAS AROUND NEARBY BL LAC OBJECTS
Observer: BIRKINSHAW
Subject Category: Active Galaxies and Quasars
Seq: 700151 ObsId: 00846
Long-term Plan bin: no LTS bin
ABSTRACT
If FR~I radio galaxies and BL~Lac objects are parts of a single population, and only their orientation causes them to appear different (the BL~Lac ``unification'' scheme), then they should have the same isotropic properties. We recently extended existing radio and optical tests to the X-ray by searching near BL~Lacs for X-ray emission which matches the X-ray envelopes of FR~I objects found by Worrall \& Birkinshaw (1994). The well-known object PKS~0521-365 shows an unexpectedly strong halo when observed with the ROSAT HRI. Here we propose to use ACIS-I to obtain images and spectroscopy for PKS~0521-365 and three other BL Lacs. The data will determine the physical relationship between halos and their AGN and test the unification scheme.
TARGET SUMMARY
| TARGET NAME |
RA | DEC |
TIME |
SI |
GRAT |
TYPE |
TC |
ROLL |
PRE |
PHASE |
MULTI |
PRI |
| PKS 0521-365 |
80.741580 | -36.458570 |
10.00000 |
ACIS-S |
NONE |
GO |
no |
no |
no |
no |
no |
5 |
IMAGES
(NOTE: RASS images currently only available for targets LTS scheduled on or after Apr-09-2000)
PARAMETERS
Obscat Parameters
