期刊
ASTROPHYSICAL JOURNAL
卷 713, 期 2, 页码 912-919出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/713/2/912
关键词
instrumentation: miscellaneous; ISM: supernova remnants; methods: data analysis; pulsars: individual (Crab Pulsar); X-rays: individual (Crab Nebula)
Motivated by a paper of Kirsch et al. on possible use of the Crab Nebula as a standard candle for calibrating X-ray response functions, we examine consequences of intrinsic departures from a single (absorbed) power law upon such calibrations. We limit our analyses to three more modern X-ray instruments-the ROSAT/PSPC, the RXTE/Proportional Counter Array, and the XMM-Newton/EPIC-pn (burst mode). The results indicate a need to refine two of the three response functions studied. We are also able to distinguish between two current theoretical models for the system spectrum.
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