Accession Number : AD0675203

Title :   FURTHER OBSERVATIONS OF PULSATING RADIO SOURCES AT 13 CM,

Corporate Author : CALIFORNIA INST OF TECH PASADENA OWENS VALLEY RADIO OBSERVATORY

Personal Author(s) : Ekers,R. D. ; Moffet,A. T.

Report Date : 1968

Pagination or Media Count : 26

Abstract : Four pulsars, CP0834, CP0950, CP1133 and CP1919 have been observed at 13 cm with the 210 ft antenna of the J.P.L. Goldstone tracking station. Comparison of the 13 cm intensities with those observed elsewhere at longer wavelengths shows that two have definite cutoffs near 30 cm while one, CP1133 has a power-law spectrum. Pulse shapes are similar to those observed at 74 cm, except that the second component in CP1133 is relatively less intense at 13 cm. Study of individual pulses shows intensity fluctuations with time scales as short as 50 microsec, although the average shape of the pulses is stable. Periods for three pulsars are given with accuracies of 10 to the -8th power to 10 to the -9th power sec, the uncertainties being entirely due to present uncertainties in the source positions. No evidence for any change in period as large as 10 to the -8th power sec has been seen. A position measurement for CP1133 is given.

Descriptors :   (*EXTRATERRESTRIAL RADIO WAVES, PERIODIC VARIATIONS), PHOTOGRAPHIC ANALYSIS, S BAND, ELECTROMAGNETIC PULSES, POLARIZATION, POSITION FINDING, MASERS

Subject Categories : Astrophysics

Distribution Statement : APPROVED FOR PUBLIC RELEASE