William B. Smith
Massachusetts Institute of Technology
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Publication
Featured researches published by William B. Smith.
The Astrophysical Journal | 1968
G. W. Clark; W. H. G. Lewin; William B. Smith
Northern sky survey of high energy cosmic X rays and sources spectra in Crab Nebula and Cygnus using balloon-borne detector
Icarus | 1969
Gordon H. Pettengill; Irwin I. Shapiro; Michael E. Ash; Richard P. Ingalls; L.P. Rainville; William B. Smith; M.L. Stone
Abstract The minor planet Icarus was observed with the 3.8-cm Haystack radar from 12 to 15 June 1968. Weak but significant echoes were detected indicating a radar cross section of about 0.1 km2, a radius of about 1 km, and an effective reflectivity of about 0.05. These results have an uncertainty of about a factor of 2.
Symposium - International Astronomical Union | 1970
W. H. G. Lewin; Jeffrey E. McClintock; William B. Smith
On March 20, 1969, we scanned the Southern sky for 8 hours in a manner similar to that during our October 15, 1967 observations.* A quick look at the data shows clearly that the brightness of Cen XR-2 in the energy range above 20 keV has significantly decreased since our first observation. At this stage of the data analysis we can put an upper limit on the intensity of Cen XR-2 which is 1/3 the intensity observed by us on October 15, 1967. From further data analyses we will be able to determine the intensity of the source more precisely.**
The Astronomical Journal | 1967
Michael E. Ash; I. I. Shapiro; William B. Smith
Physical Review Letters | 1968
I. I. Shapiro; Gordon H. Pettengill; Michael E. Ash; Melvin L. Stone; William B. Smith; Richard P. Ingalls; Richard A. Brockelman
Physical Review Letters | 1971
I. I. Shapiro; William B. Smith; Michael B. Ash; Richard P. Ingalls; Gordon H. Pettengill
Science | 1971
Michael E. Ash; I. I. Shapiro; William B. Smith
The Astrophysical Journal | 1968
W. H. G. Lewin; G. W. Clark; William B. Smith
The Astrophysical Journal | 1968
W. H. G. Lewin; G. W. Clark; William B. Smith
Physical Review Letters | 1968
I. I. Shapiro; Michael E. Ash; William B. Smith
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