\magnification=\magstep1


$$
{\rm relative\ mag\ of\ star\ X} \quad = \quad 0.0 \ -\  
       2.5 \log_{10} 
       \left( {{\rm intensity\ of\ X}\over{\rm intensity\ of\ ref} } \right)
$$

$$
{\rm percentage\ uncertainty\ } \quad = \quad 
    {{\rm standard\ deviation}\over{\rm mean}}
$$

$$
{\rm phase\ } \phi \quad = \quad \left( {{t}\over{\rm Period}} \right) \ - \ 
                          {\rm int} \left( {{t}\over{\rm Period}} \right)
$$

\bye