@article{oai:sucra.repo.nii.ac.jp:00013277,
 author = {Enoto, Teruaki and Makishima, Kazuo and 寺田, 幸功 and Mihara, Tatehiro and Nakazawa, Kazuhiro and Ueda, Tsuyoshi and Dotani, Tadayasu and Kokubun, Motohide and Nagase, Fumiaki and Naik, Sachindra and Suzuki, Motoko and Nakajinia, Motoki and Takahashi, Hiromitsu},
 issue = {Sp. Iss. 1},
 journal = {Publications of the Astronomical Society of Japan},
 month = {},
 note = {The accretion-powered pulsar Her X-1 was observed with Suzaku twice in its main-on state, on 2005 October 5-6 and 2006 March 29-30, for a net exposure of 30.5 ks and 34.4 ks, respectively. In the 2005 and 2006 observations, the source was detected at an average 10-30 keV intensity of 290 mCrab and 230 mCrab, respectively. The intrinsic pulse period was measured on both occasions at 1.23776 s by HXD-PIN, after barycentric and binary corrections. The pulse phase-averaged spectra in the energy range above 10 keV were well fitted by the "Negative and Positive power-law times EXponential" (NPEX) model, multiplied by a fundamental cyclotron resonance scattering feature at similar to 36 keV, which appears very significantly in the HXD-PIN data. The resonance profiles were successfully reproduced by a Lorentzian-type scattering cross section, rather than by a Gaussian-type alternative. The pulse phase-averaged HXD-GSO data, covering 50-120 keV, are featureless. However, in a differential spectrum between the pulse-decay phase and off-pulse phase, the second-harmonic cyclotron resonance was detected in the GSO data at similar to 73 keV, with a depth of 1.6(-0.7)(+0.9) This makes Her X-1 a 6th pulsar with established second-harmonic resonance. The implications of these results are briefly discussed., text, application/pdf},
 pages = {S57--S68},
 title = {Suzaku Observations of Hercules X-1 : Measurements of the Two Cyclotron Harmonics},
 volume = {60},
 year = {2008},
 yomi = {テラダ, ユキカツ}
}