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arXiv 1104.3903astro-ph.HE
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用INTEGRAL寻找MeV = 0.3 ~ 8的脉冲星

A Search for Pulsars between 0.3 and 8 MeV using INTEGRAL

Joseph F. Dolan

摘要:

在1 Mev附近的低能伽马射线区域,只有少数的γ星的光谱是已知的。我们在已知的无线电和X射线天体的位置上寻找0.3-1和1-8兆电子伏带通的伽马辐射点源。单通道光度法使用SPI光谱仪INTEGRAL,使用编码孔径掩模获得,如果使用已知的通量从点源校准是可行的。使用蟹状星云进行了校准,并使用船帆座脉冲星进行了验证。然后观测脉冲星类型的代表性样本的位置。除了蟹状星云和船帆座星云外,没有发现任何放射源。上限给出的时间平均通量从15个其他的恒星的位置;大多数谎言低于先前公布的上限。我们确定上限为1兆电子伏的六个中子已被费米探测器探测到超过100兆电子伏。我们在这里报告的上限有助于描述这些恒星在所有波长下的光谱。

英文摘要:

The spectra of only a few pulsars are known in the low-energy gamma-ray region around 1 Mev. We searched for point sources of gamma-radiation in the 0.3-1 and 1-8 Mev bandpasses at the location of known radio and X-ray pulsars. Single channel photometry using the SPI spectrometer on INTEGRAL, obtained using a coded-aperture mask, is feasible if calibrated using known fluxes from point sources. The calibration was carried out using the Crab nebula and verified using the Vela pulsar. The locations of a representative sample of pulsar types were then observed. Other than the Crab and Vela pulsars, no sources were detected. Upper limits are given on the time-averaged flux from the location of 15 other pulsars; most lie below previously published upper limits. Six of the pulsars for which we determine upper limits at 1 MeV have been detected above 100 MeV by FERMI. The upper limits we report here help to describe the spectrum of these pulsars at all wavelengths.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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