code: def j0_1(a=1):
      r
  
      def lhs(x):
          return x*np.exp(-a*x**2)
  
      def rhs(b):
          return np.exp(-b**2/(4*a))/(2*a)
  
      return Ghosh('j0', lhs, rhs)
docs: r"""Hankel transform pair J0_1 ([Ande75]_).