The discovery of 2.93 hour periodic intensity dips from X1323-619
The discovery of 2.93 hour periodic intensity dips from X1323-619
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DOI：
10.1086/167255
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发表时间：
1989-03
期刊：
影响因子：
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通讯作者：
A. Parmar;M. Gottwald;M. Klis;J. Paradijs
中科院分区：
文献类型：
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作者：
A. Parmar;M. Gottwald;M. Klis;J. Paradijs
报道了对低质量x射线双星X1323-619的30小时观测。用中能量（ME）仪器获得的1-8 keV光曲线显示不规则的强度下降，每2.93小时重复一次，以及1型x射线爆发。在50分钟的持续下降期间，强度下降到未受影响值的50%左右。倾斜和无爆发的ME谱与其他x射线爆发源相似，用能量指数为0.5的幂律模型拟合。还需要相当大的低能量吸收。在浸渍期间观测到的光谱变化与丰度范围广的物质的吸收一致。从爆发特性的分析来看，X1323-619的距离被限制在10到20 kpc之间。37引用。
A 30 hr duration Exosat observation of the low-mass X-ray binary X1323-619 is reported. The 1-8 keV light curve obtained with the medium-energy (ME) instrument shows irregular intensity dips that recur every 2.93 hr as well as type 1 X-ray bursts. The intensity declines to about 50 percent of its unaffected value during the 50-minute duration dips. The dip and burst-free ME spectrum is similar to that of other X-ray burst sources, being fitted by a power-law model with energy index 0.5. Considerable low-energy absorption is also required. Spectral changes observed during dipping intervals are consistent with absorption by material with a wide range of abundances. From an analysis of the burst properties, the distance of X1323-619 is constrained to be between 10 and 20 kpc. 37 references.