REVEALING THE NUCLEAR OBSCURING STRUCTURES IN LOW-MASS AGN
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.
TELESCOP= 'XRISM ' / Mission name INSTRUME= 'XTEND ' / Instrument name OBS_ID = '201048010' / Observation identification string OBJECT = 'NGC4395 ' / Object name OBSERVER= 'TAIKI KAWAMURO' / PI name OBS_MODE= 'POINTING' / POINTING or SLEW or ALL RA_OBJ = 186.4536 / [deg] Object Right ascension DEC_OBJ = 33.5469 / [deg] Object Declination RA_PNT = 186.451428607906 / Pointing RA DEC_PNT = 33.5472883791355 / Pointing DEC RA_NOM = 186.454508781665 / [deg] Nominal aspect point R.A. DEC_NOM = 33.5474080671842 / [deg] Nominal aspect point Dec. PA_NOM = 137.525871846183 / [deg] Nominal aspect point roll. TELAPSE = 362262.963135988 / Elapsed time DATE-OBS= '2024-11-07T04:44:29.036864' / Start date DATE-END= '2024-11-11T09:22:12' / Stop date ONTIME = 166519.26911 / On-source time EXPOSURE= 166519.26911 / Exposure time PROCVER = '03.00.013.010' / Processing script version MKFFF = 'ISAS/JAXA' / Origin of First FITS file ORIGIN = 'GSFC/NASA' / Origin of Processed FITS file SOFTVER = 'Hea_21Aug2024_V6.34_XRISM_21Aug2024_V001' / Version of HEADAS used CALDBVER= 'gen20241115_xtd20241115_rsl20241115' / Version of CALDB used DATE = '2024-11-21T12:33:30' / Date and time this file was created or updated SIB2_VER= 'V03.01 ' / SIB2 version JAXA