Search Publications
COS-B observations of pulsed gamma -ray emission from PSR 0531+21 and PSR 0833-45.
Bignami, G. F.; Hermsen, W.; Masnou, J. L. +11 more
Summary. CO S-B has performed detailed measurements of the high-energy y-ray emission from the Crab and Vela pulsars. The two pulsars exhibit very similar y-ray light curves, both with narrow peaks of roughly equal intensity separated by 0.42+0.03 of the period. The fractions of the y-rays of energy >50 MeV which are pulsed have 2a lower limit …
Search for gamma-ray emission with a 4.8 h periodicity from Cygnus X-3.
Hermsen, W.; Bennett, K.; Mayer-Hasselwander, H. A. +3 more
Summary. The ESA CO S-B satellite has investigated the high energy gamma-ray emission from the Cygnus region of the galaxy during November to December 1975. From the counts observed to originate within the vicinity of Cygnus X-3 a histogram is derived using the 4.8 hour period observed at X-ray and infra-red wavelengths. The phase analysis reveals…
Increase in the pulsational period of 3U 0900-40.
Molteni, D.; Kanbach, G.; Mayer-Hasselwander, H. A. +4 more
The binary X-ray source 3U0900-40 has been observed with the X-ray detector on board the COS-B satellite between 1975 November 8.4 and 28.1 in the energy range 2-12 keV. Previously observed 283 s pulsations have been detected and were used to determine the binary orbital elements of the system. It is found that the pulsational period for November …
COS-B observations of localised high-energy gamma-ray emission from the anticentre region of the galactic disc.
Bignami, G. F.; Hermsen, W.; Bennett, K. +10 more
Summary. COS-B has observed sources of high-energy gamma rays in the anticentre region of the galactic disc. Only one of these (the Crab) can be positively identified with a source of radiation at other wavelengths. One of the other three (at 111 = 1960, b11 = +40) has been previously observed by SAS-2, but the others (at 111 = 1770, b11 = 70 and …
COS-B observations of X-ray emission from Cir X-1.
Maccagni, D.; Bignami, G. F.; della Ventura, A. +1 more
Summary The X-ray detector monitor on board the ESA satellite COS-E has observed the region of Cir X-1 (3U 1516-56), during 1976 February 24 through March 24. Two peaks of enhanced X-ray emission are clearly visible and confirm the periodic behavior of this source, as reported by Kaluziensky et al. (1976). The between the two adjacent maxima is 16…