code: def isTransiting(self):
          
          try:
              isTransiting = self.params['istransiting']
          except KeyError:
              return False
  
          if isTransiting == '1':
              return True
          else:
              return False
docs: Checks the the istransiting tag to see if the planet transits. Note that this only works as of catalogue
          version  ee12343381ae4106fd2db908e25ffc537a2ee98c (11th March 2014) where the istransiting tag was implemented