云南天文台大气水汽含量的观测

简述了利用北京师范大学研制的ＩＲＡ－９３５型红外水气测量仪，对凤凰山上空垂直大气水汽积分含量Ｗ０的观测结果及精度。并且给出了Ｗ０的各种变化曲线，在旱季和雨季的Ｗ０分布。同时也给出了红外测水仪测得的数据Ｗ０与无线电探空资料计算得到的数据Ｗ０的比较相关。结果表明：凤凰山上空垂直大气积分水汽含量雨季平均为２．４９６ｃｍ，旱季平均为１．００３ｃｍ；Ｗ０与Ｗ’０的相关系数为０．９４２，测量误差小于５％。     

云南天文台凤凰山大气含量水量全年测量数据的统计分析

给出了云南天文台上空垂直大气含水量Ｗ０的全年测量数据的统计结果和精度分析,包括Ｗ０的逐日变化,Ｗ０分别在雨季和旱季的分布。     

高美古水汽含量的观测

介绍了利用北京师范大学研制的ＩＲＡ－９３５型红外水汽测量仪对丽江高美古天文候选点上空垂直大气水汽积分含量Ｗ０的观测情况。给出了Ｗ０的各种变化曲线及在雨季和旱季的Ｗ０分布。结果表明：高美古上空垂直大气水汽积分含量雨季平均为１６．３０９ｍｍ，旱季平均为５．０９９ｍｍ。     

高美古与凤凰山水汽含量的统计分析

介绍了利用北京师范大学研制的ＩＲＡ－９３５型红外水汽测量仪对云南丽江高美古天文候选点及昆明凤凰山对比点上空垂直大气水汽积分含量Ｗ０的观测结果,给出了两地Ｗ０的日变化曲线及分布图,并对全年测量数据的统计结果作了分析和讨论     

高美古与凤凰山水汽含量的统计分析

介绍了利用北京师范大学研制的ＩＲＡ－９３５型红外水汽测量仪对云南丽江高美古天文候选点及昆明凤凰山对比点上空垂直大气水汽积分含量Ｗ０的观察结果,给出了两地Ｗ０的日变化曲线及分布图,并对全年测量数据的统计结果作了分析和讨论。     

活动星系统大蓝包的峰值在1050A附近吗？

对中小红移不同光度ＡＧＮ的大蓝包位置进行了统计检验,主要统计方法是对比软Ｘ射线波段谱指数（αｓｘ）分布与“直线”连接紫外１０５０Ａ和软Ｘ射线０．５ｋｅＶ的幂指数（αｕｖ－ｓｚ）分布,经过平均值统计和Ｋ－Ｓ检验,表明二分布是类似的。因此,在１０５０Ａ至０．５ｋｅＶ中可能是幂律谱,统计预言大蓝包峰值在１０５０Ａ附近,这个统计结果在软Ｘ选低光度ＡＧＮ样本（ＷＦ９３）上亦能得到,这表明ＷＦ９３样品尽管普     

卫星积分多普勒定位观测的初归算结果

本对１９８４年４月－１９８５年４月在南京紫金山山上大人卫测点，用积分多普勒观测的二维单点定位资料进行了分析。并根据卫星来自ＳＥ、ＳＷ、ＮＥ、ＮＷ四个象限获取的资料，分别进行了归算和处理，结果精度如下：σφ（ＳＥ）＝３．７ｍ，σφ（ＳＷ）＝４．２ｍ σφ（ＮＥ）５．１ｍ，σφ（ＮＷ）＝６．５ｍ σλ（ＳＥ）＝４．９ｍ，σλ（ＳＷ）＝５．６ｍ σλ（ＮＥ）３．３ｍ，σλ（ＮＷ）＝４．０ｍ上述表达式中     

恒星自转的引力昏暗效应对谱线的影响

对于快速自转的恒星,谱线的等值宽度（ＥＷ）受引力昏暗效应的影响,即使自转速度达到临界也是很小的,而谱线半宽（ＦＷＨＭ）受引力昏暗效应影响相对较大,在（ｗ＝０．９９）时,相对变化达到８％。对于光谱型在Ｂ０￣Ｂ９范围内的主序星,谱线半宽的相对变化在自转速度较小时（ｗ〈０．８）与光谱型无关,在自转速度较大时（ｗ＝０．９９）,谱线半宽的相对变化随光谱次型的增加而下降。     

恒星自转的引力昏暗效应对谱线的影响

对于快速自转的恒星,谱线的等值宽度（ＥＷ）受引力昏暗效应的影响,即使自转速度达到临界也是很小的;而谱线半宽（ＦＷＨＭ）受引力昏暗效应影响相对较大,在（ω≈０．９９）时,相对变化达到８％．对于光谱型在Ｂ０～Ｂ９范围内的主序星,谱线半宽的相对变化在自转速度较小时（ω＜０．８）与光谱型无关;在自转速度较大时（ω≈０．９９）,谱线半宽的相对变化随光谱次型的增加而下降．     

1997年3月9日日全食8.6mm波段射电观测

１９９７年３月９日日全食８．６ｍｍ波段射电观测资料的分析表明,８．６ｍｍ波段射电太阳的半径为１．０１２Ｒ,总流量为２５４０ｓｆｕ（１ｓｆｕ＝１０＾－２２Ｗ／ｍ＾２Ｈｚ）,日面平均亮温度为９６３２Ｋ,径向亮温度分布,在日面光学边缘内侧０．９３６－０．９９２Ｒ处,存在临边增亮,平均增亮幅度相对于日面中心为９．７％。     

SiteTesting with IRA-935 Hygrometer and Statistical Analyses

1　ＩｎｔｒｏｄｕｃｔｉｏｎＡｓｔｒｏｎｏｍｉｃａｌｏｂｓｅｒｖａｔｉｏｎｓｗｉｔｈｇｒｏｕｎｄ ｂａｓｅｄｔｅｌｅｓｃｏｐｅｓａｔｏｐｔｉｃａｌ,ｉｎｆｒａｒｅｄａｎｄｓｕｂｍｉｌｌｉｍｅ ｔｅｒｗａｖｅｌｅｎｇｔｈｓａｒｅｓｔｒｏｎｇｌｙａｆｆｅｃｔｅｄｂｙｗａｔｅｒｖａｐｏｕｒｉｎｔｈｅａｔｍｏｓｐｈｅｒｅ .Ｔｈｅｓｅｎｓｉｔｉｖｉｔｙｏｆａｓｔｒｏ ｎｏｍｉｃａｌｍｅａｓｕｒｅｍｅｎｔｓｉｓｌｉｍｉｔｅｄｂｙｅｘｔｉｎｃｔｉｏｎ ,ｂａｃｋｇｒｏｕｎｄｅｍｉｓｓｉｏｎａｎｄｓｋｙｎｏｉｓｅ .Ｔ…     

A new photographic method for mapping lunar eclipse shadow

A new photographic method suitable for digital processing of a two-dimensional density distribution of lunar eclipse shadow has been developed and it has been applied to the observation of the eclipse of December 30, 1982. The principle of this method is to extract the terrestrial shadow by utilizing immediate post- or pre-eclipse full Moon image as a reference template. The uncertainties of the obtained shadow maps in density and position are mostly 0.03–0.05 and 10–15 respectively. Iso-density contours of the penumbra have revealed unknown systematic deviations from a geometrical (concentric) shadow model in terms of their directions of center and radii of curvature. A density map of the umbra has shown very irregular shapes of isophotoes and density variation in the outer umbra has been proved to be consistent with the optical depth measurement of the stratosphere performed in the same period of time with lidars and aircrafts. Geographic consideration of the shadow terminator on the Earth suggests that the remnant aerosols above the northern Pacific and northern Europe flown up by a Mexican volcano 8 months ago prior to this eclipse will be mainly responsible for the formation of such variation of density in the outer penumbra.On leave from Tokyo Astronomical Observatory as Visiting Scientist (from 28 Aug. 1984 to 27 Aug. 1985).     

Observations of Comet C/2001 A2 (Linear) with the Multipupil Fiber Spectrograph

We present preliminary results of observations of the spectrum of comet C/2001 A2(LINEAR) obtained with the Multipupil Fiber Spectrograph, installed in the PrimeFocus of the 6-m Telescope of the SAO of the RAS (Northern Caucasus, NizhnyArkhyz), on August 11/12, 12/13 and 14/15, 2001. High resolution spectra of thecomet were obtained in the range from 3800–5200 AA. The emission lines in the spectrum of comet C/2001 A2 (LINEAR) on Aug. 12, 2001 were identified. Thefluorescent continuum in the spectrum of comet C/2001 A2 (LINEAR) on Aug. 12,2001 is detected.     

A classification scheme for solar flare models

We present a classification scheme for solar flare models that utilize magnetic free energycurrents. The classification scheme is geometry independent and delineates models into two categories: those models utilizing currents flowing parallel to B and those utilizing currents flowing perpendicular to B. This delineation of drivers allows us to specify what kinds of plasma-magnetic field configurations should be expected for a given current driver. Further, the delineation of drivers will allow us to identify both the strengths and the weaknesses of the various models.Based on invited talks given at the SERF Workshop (Aug. 13, 1979) and the IAU Meeting of Commission 10 (Aug. 15, 1979) held in Montreal.     

A new technique for the determination of coronal magnetic fields: A fixed mesh solution to Laplace's equation using line-of-sight boundary conditions

A new method for computing potential magnetic field configurations in the solar atmosphere is described. A discrete approximation to Laplace's equation is solved in the domain R r R ₁, 0 , 0 2 (R ₁being an arbitrary radial distance from the solar center). The method utilizes the measured line-of-sight magnetic fields directly as the boundary condition at the solar surface and constrains the field to become radial at the outer boundary, R ₁. First the differential equation and boundary conditions are reduced to a set of two-dimensional equations in r, by Fourier transforming out the periodic dependence. Next each transformed boundary condition is converted to a Dirichlet surface condition. Then each two-dimensional equation with standard Dirichlet-Dirichlet boundary conditions is solved for the Fourier coefficient it determines. Finally, the solution of the original three dimensional equation is obtained through inverse Fourier transformation. The primary numerical tools in this technique are the use of a finite fast Fourier transform technique and also a generalized cyclic reduction algorithm developed at NCAR. Any extraneous monopole component present in the data can be removed if so desired.The code was developed for the HAO solar-interplanetary modeling effort in response to the following specific requirements:

Guide and examples for users of the ‘SPACEKAP’ style file

Guide and examples for users of the SPACEKAP style fileBasic instructions     

Bemerkungen zur Geschichte der Himmelsmechanik

Ohne ZusammenfassungPaper presented at the Conference on Celestial Mechanics, Oberwolfach, Germany, Aug. 17–23, 1969.     

Photographische Positionen des Kometen Halley (1982i)

There are represented 25 positions of the comet Halley between 1985 Aug. 21 and Oct. 22 determined from plates of the Tautenburg Schmidt telescope 1340/2000/4000.