DISCOVERY OF A PECULIAR X-RAY PULSAR GS-1843+00

被引：16

作者：

KOYAMA, K ^{[1
]}

KAWADA, M ^{[1
]}

TAKEUCHI, Y ^{[1
]}

TAWARA, Y ^{[1
]}

USHIMARU, N ^{[1
]}

DOTANI, T ^{[1
]}

TAKIZAWA, M ^{[1
]}

机构：

[1] INST SPACE & ASTRONAUT SCI,SAGAMIHARA,KANAGAWA 229,JAPAN

来源：

ASTROPHYSICAL JOURNAL | 1990年 / 356卷 / 02期

关键词：

Pulsars; X-rays: sources; X-rays: spectra;

D O I：

10.1086/185747

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A transient X-ray pulsar with a period of about 29.5 s was discovered with the Ginga satellite at a position of α (1950) = 18h43m±1m, δ (1950) = 0°52′±7′ (GS 1843+00). The X-ray intensity was in the range of 30-60 mCrab. The peak-to-peak pulse amplitude was unusually small, about only 4% of the average flux in the 2-37 keV band. This amplitude is smaller at lower energies. The pulse profile is a simple sinusoid at low energies, whereas it exhibits two peaks at higher energies. GS 1843+00 also exhibits a large-amplitude aperiodic intensity variation on a wide range of time scales, which is superposed on this small amplitude of the coherent pulsation. The amplitude of the aperiodic variation is larger at low energies than at high energies, in contrast to the coherent pulsation.

引用

页码：L47 / L50

页数：4

共 14 条

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