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Astron. Astrophys. 327, L21-L24


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Letter to the Editor

A BeppoSAX observation of the Crab Pulsar (PSR B0531+21)

T. Mineo1, G. Cusumano1, A. Segreto1, E. Massaro2, D. Dal Fiume3, S. Giarrusso1, A. Matteuzzi4, L. Nicastro3, and A.N. Parmar5

1Istituto di Fisica Cosmica ed Applicazioni all'Informatica C.N.R.,Via U. La Malfa 153, I-90146, Palermo, Italy
2Istituto Astronomico, Unita' GIFCO Roma-1, Universita' ''La Sapienza", Via Lancisi 29, I-00161 Roma, Italy
3Istituto di Tecnologie E Studio delle Radiazioni Extraterrestri CNR, Via P. Gobetti 101, I-40129, Bologna, Italy
4BeppoSAX Science Data Center, c/o Nuova Telespazio, Via Corcolle 19, I-00131 Roma, Italy
5Astrophysics Division, Space Science Department of ESA, ESTEC, Post box 299, 2200 AG Noordwijk, The Netherlands

Received 1 July 1997 / Accepted 22 July 1997

Abstract

The Crab Pulsar (PSR B0531+21) was observed by the four Narrow Field Instruments onboard the Italian-Dutch satellite BeppoSAX in August and September 1996, during the Science Verification Phase. The fine time resolution (15 µs) and high statistics provided phase histograms of very good quality over the entire energy band (0.1-300 keV) covered by BeppoSAX payload. In this letter we present a detailed study of the variations in the light curve shape with energy and evaluate the spectral index difference between the main features.

Key words: stars - stars: neutron - pulsar: individual - X-rays: stars

Send offprint requests to: T. Mineo: mineo@ifcai.pa.cnr.it


© European Southern Observatory (ESO) 1997

Online publication: October 20, 1997
Last change: April 6, 1998
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