Observation of hard X-rays from the Crab pulsar and A0535+26

Details Observation of hard X-rays from the Crab pulsar and A0535+26 Observation of hard X-rays from the Crab pulsar and A0535+26

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....1..149w&link_type=abstract

In NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 1 p 149-150 (SEE N85-33902 22-93)

Astronomy and Astrophysics

Astronomy

Celestial Bodies, Crab Nebula, Pulsars, Pulsed Radiation, Radiation Sources, Scintillation Counters, X Ray Sources, Data Acquisition, Radio Stars, X Ray Astronomy, X Ray Telescopes

Scientific paper

The Crab pulsar PSR0531+21 was observed in a balloon flight from the Xianghe Balloon Station (China). Data were obtained in the range 20 to 200 keV with a poswish hard X-ray telescope which comprised a 150 sq cm primary crystal of 5 mm thick CsI(T1) which actively shielded the lower 2 pi steradians by a 5 cm thick NaI(T1) crystal. The scintillation pulses originating in CsI and NaI crystals are distinguished by pulse shape discrimination. The telescope has a field of view of approximately 4 deg H psi H pi determined by graded shield and collimator. The effective geometric area of the detector is 116 sq cm. It is noted that when folding a data flow on a long period interference from the data acquisition, transmission and recording system considerably affect the result.

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