The results are given of observations of the occultation of the Crab nebula by the Moon at the frequencies 960, 750, 178, 128 }.~z. The observations yield the coordinates of the centroids and the angular dimensions of the nebula in the directions of the minor and major axes. Details of the structure of the source at 960 and 750 }.~{z, for which the occultation curves have the best signal-to-noise ratio, are investigated. The o c c u l t a t i o n o f t h e C r a b n e b u l a by t h e Moon on J a n u a r y 2 6 , 1983, was i n t e r e s ti n g f o r t h e p o s s i b i l i t y o f s t u d y i n g t h e s o u r c e s t r u c t u r e i n a w i d e r a n g e . T h e r e f o r e , m e a s u r e m e n t s w e r e made a t 9SO, 750, 178, and 128 r~IIz. The o b s e r v a t i o n s y i e l d e d t h e radio intensities of the Crab nebula as a function of the time in the initial and final occultation phases;the position angles were, respectively, 2306 and 127 ~ The form of the individual curves is shown for entry for the frequencies 750 MHz (Fig. la), 178 }D{z (Fig. Ib), and 128 }{Hz (Fig. ic) and for a emergence for 750 MHz (Fig. 2).The abscissa is measured in minutes of arc from the time of contact of the Moon's disk with the central star, whose position c o i n c i d e s w i t h the coordinates of the pulsar Institute
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.