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Titolo:
RXTE observations of single pulses of PSR B0531+21 - I. Flux variations
Autore:
Vivekanand, M;
Indirizzi:
TIFR, Natl Ctr Radio Astrophys, Pune 411007, Maharashtra, India TIFR PuneMaharashtra India 411007 ophys, Pune 411007, Maharashtra, India
Titolo Testata:
ASTRONOMY & ASTROPHYSICS
fascicolo: 1, volume: 373, anno: 2001,
pagine: 236 - 240
SICI:
1432-0746(200107)373:1<236:ROOSPO>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
RAPIDLY SPINNING PULSARS; GAMMA-RAY PULSARS; CRAB PULSAR; ENERGETIC RADIATION; RADIO-EMISSION; 327 MHZ; X-RAY; J0437-4715; TELESCOPE; GAPS;
Keywords:
pulsars; individual : PSR B0531+21; X-ray : stars;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Vivekanand, M TIFR, Natl Ctr Radio Astrophys, Pune Univ Campus,POB 3, Pune411007, Maharashtra, India TIFR Pune Univ Campus,POB 3 Pune Maharashtra India 411007 ia
Citazione:
M. Vivekanand, "RXTE observations of single pulses of PSR B0531+21 - I. Flux variations", ASTRON ASTR, 373(1), 2001, pp. 236-240

Abstract

This article is the first in the series that analyze about 1.87 million periods of PSR B0531+21 (Crab pulsar), observed by the PCA detector aboard the RXTE X-ray observatory. The Crab pulsar's X-ray light curve shows little variation over time scales ranging from days to a period (33.46 milliseconds). The standard deviation of its X-ray flux variation is approximate to 0.7% of its mean value, which is negligible compared to its radio flux variations. The phase resolved power spectrum of pulse to pulse X-ray flux variation shows no spectral feature; an upper limit to the peak of any possible broad spectral feature is 0.06% of the mean power. The X-ray fluxes in the two components of its integrated profile are unrelated to each other; their linear correlation coefficient is 0.0004 +/- 0.0010. "Giant pulses" that are routinely seen at radio wavelengths are absent here. This work sets very strong constraints on the connection (if any) between the flux variations at radio and X-ray energies, for example due to variation in the degree of coherence of the basic emitters. Its phase resolved X-ray flux variation shows a weak correlation with the integrated profile. If confirmed, this mightbe an important clue to understanding the X-ray emission mechanism of Crabpulsar.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 20:15:03