Discovery of 101-s Pulsations from AX J0057.4-7325 in the SMC with ASCA

(2) National Space Development Agency of Japan; (3) Osaka University); Jun Yokogawa (1); Katsuji Koyama (1) ((1) Kyoto University; Ken'ichi Torii (2); Kensuke Imanishi (1); Takayoshi Kohmura (3)

arxiv: astro-ph/0011049 · v1 · pith:WGLLUK4Onew · submitted 2000-11-02 · 🌌 astro-ph

Discovery of 101-s Pulsations from AX J0057.4-7325 in the SMC with ASCA

Jun Yokogawa (1) , Ken'ichi Torii (2) , Takayoshi Kohmura (3) , Kensuke Imanishi (1) , Katsuji Koyama (1) ((1) Kyoto University , (2) National Space Development Agency of Japan , (3) Osaka University) This is my paper

classification 🌌 astro-ph

keywords j0057ascafluxobservationspulsationsarchivalbarycentriccoherent

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The results from two ASCA observations of AX J0057.4-7325 = RX J0057.3-7325 are presented. Coherent pulsations with a barycentric period of 101.45 +/- 0.07 s were discovered in the second observation. The X-ray spectrum was found to be hard (photon index ~ 0.9) and unchanged through these observations, except for the flux. The ROSAT archival data show that AX J0057.4-7325 exhibits a flux variation with a factor >~ 10. A discussion on a possible optical counterpart is given.

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Discovery of 101-s Pulsations from AX J0057.4-7325 in the SMC with ASCA

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