Multiwavelength study of NGC 1365: The obscured active nucleus and off-nuclear compact X-ray sources

ABSTRACT We present a multiwavelength study of the active nucleus and off-nuclear X-ray sources in nearby spiral galaxy, NGC 1365 using three simultaneous UV/X-ray observations by AstroSat over two months period archival IR performed with Spitzer Herschel. Utilizing data from Soft Telescope (SXT) onboard AstroSat, we find spectral variability mainly caused variation column density, (NH ∼ 1022–1023 cm−2). With accurate spatial resolution UVIT separate intrinsic AGN flux host galaxy emission then correct for Galactic internal reddening. detect no significant NUV observation period. The FUV band is undetectable due to heavy extinction. Further, IR/UV/X-ray SED reveals that low-luminosity phase accretion rate ∼0.01 LEdd. steady UV strong absorption suggest obscuring clouds are likely compact affect source only do not possibly cover extended emitting region. In addition, able resolve bright spots at radius 7 arcsec (∼6.3 Kpc) central South-West (SW) direction. image entire identify counterparts four Chandra identified sources. One well-known ultra-luminous (ULX) X2 its counterpart 86 North-East (NE) direction nucleus.