NGC4395
In understanding the mass accretion onto the BH in all mass range from stellar-mass to supermassive BHs, obscuring structures are crucial, but particularly those of low-mass AGNs are poorly understood. Thus, this proposal aims to study obscuring matter of the nearby low-mass AGN NGC 4395 by 200-ks observation. Our objectives are as follows. (1) Assess the geometrical thickness of the torus by focusing on iron emission originating at radii larger than a dust-sublimation radius. (2) Constrain the inner radius of an iron broad-line region (BLR) by reverberation mapping between the iron-line and continuum emission, and derive a virial factor. Then, assuming a disk model, we will constrain the geometric structure of the BLR, and will conclude the main obscuring structure of the low-mass AGN.
obsid = 201048010 / Unique Observation/Sequence Number
object = NGC4395 / Object name
pi_name = KAWAMURO TAIKI / Proposal Principal Investigator Name
ra = 186.454508781665 / Right Ascension (Pointing Position) (deg)
dec = 33.5474080671842 / Declination (Pointing Position) (deg)
roll_angle = 137.525871846183 / Roll Angle (deg)
start_time = 2024-11-07T04:04:04 / Start Time of the Observation
stop_time = 2024-11-12T07:01:04 / Stop Time of the Observation
exposure = 237324.82812494 / Effective Total Observation Exposure (s)
public_date= 2025-12-11 / Public Date