Abstract for Proposal 096412
X-ray spectropolarimetry of X-ray bright AGNs with XMM, NuSTAR and IXPE
X-ray spectropolarimetry has enabled a significant advancement in
our understanding of the hot corona in radio-quiet AGN. Polarimetric
measurements with IXPE allow us, for the first time, to directly
constrain the geometrical shape of the hot corona, hence its physical
origin. However, detailed spectral information with XMM is crucial
to measure absorption and to disentangle the contribution of the hot
corona and other spectral components (such as reflection). We present
a list of X-ray bright, radio-quiet AGNs that have been proposed in the
second IXPE General Observing Cycle, starting in February 2025. Should
they be observed by IXPE, we request simultaneous observations with XMM
and NusTAR.
Details on Observing Strategy and Trigger Criteria
We propose a list of nine radio-quiet AGN that the IXPE Consortium has
proposed as IXPE targets in the second General Observing Cycle. We propose
to observe with XMM any source that will be observed by IXPE. We expect
that IXPE will observe one to two of such sources during Cycle 2. The
sources are X-ray bright Seyfert galaxies and have already been observed
by XMM. However, given their variability, we require a simultaneous
observation with IXPE. The success of this strategy is well demonstrated
by similar spectro-polarimetric observations of radio-quiet AGN.