3C390.3
Research on the broad line region in active galactic nuclei (AGN) has predominantly relied on UV/optical spectroscopy. A sub-category of unabsorbed AGN showing double-peaked broad Balmer lines hints to a contribution from the accretion disk. This proposal aims at utilizing the unprecedented high spectral resolution of XRISM/Resolve study the double-peaked Fe Ka line in 3C390.3, thought to be produced at a few hundred gravitational radii from the central black hole. The proposed XRISM observation will unambiguously establish the origin of this feature. This will provide a novel perspective, unveiling the complex structure and stratification of the inner accretion flow in AGN.
obsid = 202087010 / Unique Observation/Sequence Number
object = 3C390.3 / Object name
pi_name = KAMMOUN ELIAS / Proposal Principal Investigator Name
ra = 280.534427554174 / Right Ascension (Pointing Position) (deg)
dec = 79.7716883476687 / Declination (Pointing Position) (deg)
roll_angle = 66.2892364941221 / Roll Angle (deg)
start_time = 2026-04-22T21:38:04 / Start Time of the Observation
stop_time = 2026-04-26T19:46:04 / Stop Time of the Observation
exposure = 228761.23518 / Effective Total Observation Exposure (s)
public_date= 2027-05-09 / Public Date