@Article{JayanthiBrag:1991:PhImAn,
               author = "Jayanthi, Udaya Baskharam and Braga, Joao",
                title = "Physical implementation of an antimask in URA based coded mask 
                         systems",
              journal = "Nuclear Instruments and Methods in Physics Research A",
                 year = "1991",
               volume = "310",
               number = "3",
                pages = "685--689",
                month = "Dec.",
             keywords = "X-ray, gamma-ray, URA based coded mask systems.",
             abstract = "X- and gamma-ray astronomy experiments which employ rectangular 
                         URA coded masks alone show artifacts in the images reconstructed 
                         due to nonuniform background levels in the detector plane. The 
                         employment of a separate antimask in addition to the mask in 
                         observations is useful to eliminate this problem. We propose here 
                         a method to implement the antimask with the same mask, utilizing 
                         the antisymmetric properties in the mask pattern, thereby avoiding 
                         the need for a separate antimask in an experiment. Simulations 
                         performed with this mask-antimask system are presented to show its 
                         advantages.",
                 issn = "0168-9002",
                label = "3040",
             language = "en",
        urlaccessdate = "28 jun. 2024"
}