X-ray Observation of Cen XR-4 and Nor XR-2

Details X-ray Observation of Cen XR-4 and Nor XR-2 X-ray Observation of Cen XR-4 and Nor XR-2

Jan 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971natur.229..248r&link_type=abstract

Nature, Volume 229, Issue 5282, pp. 248-250 (1971).

Astronomy and Astrophysics

Astronomy

3

Scientific paper

WE wish to present the results of an X-ray astronomy experiment conducted from a Centaure rocket launched from Thumba Equatorial Rocket Launching Station (TERLS), India, at 0035 UT on December 7, 1969. The detector consisted of a xenon-methane proportional counter of useful area of 55 cm2 with a 18 mg cm-2 thick beryllium window and a slat collimator with a field of view of 7° × 15°. It had a resolution of 20% for 6 keV X-rays from a 55Fe radioactive source. The rocket aspect1 determined from onboard magnetic and Sun sensors showed that it had a spin rate of 5.5 r.p.s. and a precession with a half cone angle of about 3° around an axis centred at R.A. 8 h 56 m +/- 4 m and declination 3° +/- 1°. The X-ray data were pulse height analysed into three contiguous energy channels in the energy range 2-18 keV.

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