SUMMARY OF SEQUENCE NUMBER 700137
SUMMARY OF SEQUENCE NUMBER 700137
Title: RECONCILING UV AND X-RAY OBSERVATIONS OF BALQSO WINDS
Observer: HAMANN
Subject Category: Active Galaxies and Quasars
Seq: 700137 ObsId: 00832
Long-term Plan bin: no LTS bin
ABSTRACT
Recent X-ray observations of BALQSOs indicate absorbing columns that are 2 or more orders of magnitude larger than previous estimates from the UV absorption lines. This huge discrepancy must be resolved if we are to understand even the most basic properties of BAL winds (eg. their mass, location, acceleration, ionization, etc.). I recently used high-quality HST spectra of the bright (V = 15.8), low redshift (z_abs = 0.87) BALQSO PG 1254+047 to derive much larger column densities from the BALs, invoking new evidence that the lines are more optically thick than they appear. I now propose AXAF/ACIS-S observations to 1) test my BAL analysis and 2) place unprecedented constraints on the wind parameters and on the relationship between the UV and X-ray absorbers.
TARGET SUMMARY
| TARGET NAME |
RA | DEC |
TIME |
SI |
GRAT |
TYPE |
TC |
ROLL |
PRE |
PHASE |
MULTI |
PRI |
| PG 1254+047 |
194.250417 | 4.459500 |
40.00000 |
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
