The 2002 Campaign on NGC 4151
Index Papers, (See also), The Team, Observing Schedule

Overview

(Proposal Abstract): Determining the nature of the soft X-ray absorption in the Seyfert galaxy NGC 4151 has proved elusive. Currently, the strong downturn below 3 keV is thought to be a blend of absorption edges from highly ionized species in an unusually large column of gas. However, it has been impossible to test this explanation or constrain physical models of the gas due to the inability of previous X-ray missions to resolve the expected absorption lines. We propose simultaneous Chandra and HST/STIS observations of NGC 4151 to detect the X-ray absorption lines, determine the ionization state, column, and kinematics of the X-ray absorbers, and determine the connection to the UV absorbers.

Results, Papers etc

Links (see also)

The Team

Name CXO HST e-mail
Steve Kraemer PI PI stiskraemer@yancey.gsfc.nasa.gov
Ian George . . ian.george@gsfc.nasa.gov
Mike Crenshaw . . crenshaw@chara.gsu.edu
Jake Gabel . . gabel@iacs.gsfc.nasa.gov
John Hutchings . . john.hutchings@hia.nrc.ca
Gerry Kriss . . gak@stsci.edi
Richard Mustotzky . . mushotzky@lheavx.gsfc.nasa.gov
Hagai Netzer . . netzer@wise.tau.ac.il
Brad Peterson . . peterson@astronomy.ohio-state.edu
T.Jane Turner . . turner@lucretia.gsfc.nasa.gov
Jianning Zeng jnzeng@jca.umbc.edu

Observing Schedule - Summary

Chandra 250ks using HETGS
HST 5 orbits using STIS-MAMA

Observing Schedule - Details

DATE Observation OK ? DATA ?
2002 May 09 CXO obs#2 (3052) Done Received
2002 May 07 CXO obs#1 (3480) Done Received
??? HST ??? ???