SUMMARY OF SEQUENCE NUMBER 700000
SUMMARY OF SEQUENCE NUMBER 700000
Title: A PRECISE MEASUREMENT OF THE POSITION OF THE SOURCE OF GIANT AND RAPID VARIABILITY IN THE NLS1 13224-3809
Observer: PREDEHL
Subject Category: Active Galaxies and Quasars
Seq: 700000 ObsId: 00328
Long-term Plan bin: 11-Feb-2000
ABSTRACT
Within a 30 day ROSAT HRI monitoring observations we have detected the strongest persistent X-ray variability known in a Seyfert galaxy. At least 5 giant amplitude variations with a factor of about 60 are visible. Unusually strong relativistic boosting effects provide the most plausible explanation of the X-ray data. We propose to use AXAF for a precise measurement of the position of the source of the strong variability to further proof that the X-rays we measure are associated with the distant galaxy. We expect about 500 HRC photons within 10 ks observing time. We may further improve the HRG position using serendipitous X-ray sources detected previously with the HRI that have counterparts in the Optical.
TARGET SUMMARY
| TARGET NAME |
RA | DEC |
TIME |
SI |
GRAT |
TYPE |
TC |
ROLL |
PRE |
PHASE |
MULTI |
PRI |
| IRAS 13224-3809 |
201.333333 | -38.415278 |
10.00000 |
HRC-I |
NONE |
GTO |
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
