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   PR # 21087
    NGC4418 is known as a normal spiral galaxy by its optical image. But 
    this galaxy has shown interesting characteristics by other wavelength
    observations; (1)One of the IRAS bright galaxies(10^11 solar luminosi
    ty),  and "warm" FIR color,  (2)Strong silicate absorption at mid-IR 
    range, (3)No ionic lines and dust emission feature related to starbur
    st in optical & infrared spectra, (4)Quite high L(FIR)/M(H2) ratio   
    than other luminous IRAS galaxies, (5)copact radio core and high     
    brightness temperature. These characteristics favor the presence of  
    "hidden AGN" in  this galaxy, but this is not clear yet. The ASCA    
    observation will reveal whether AGN is existence or not in NGC4418.  
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