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Astron. Astrophys. 327, L21-L24 (1997)

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Letter to the Editor

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

T. Mineo 1, G. Cusumano 1, A. Segreto 1, E. Massaro 2, D. Dal Fiume 3, S. Giarrusso 1, A. Matteuzzi 4, L. Nicastro 3 and A.N. Parmar 5

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

Received 1 July 1997 / Accepted 22 July 1997


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 [FORMULA]s) 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

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© European Southern Observatory (ESO) 1997

Online publication: April 6, 1998