Methods of precise determination of light energy concentration of telescopes

353

Abstracts

morphology flares.

undergoes

4) The activation

this particular

The

drastic

event.

changes.

3) The site of collision

of the large filaments (AA&

on October

may produce

many

29 may be connected

with

1994,35,44-50)

stable regions of triangular libration points of the planets. II. ZHAO

CHANG-YIN~~~& Lru Sciences,

LINT lPurpZe Mountain

Nanjing 210008, 2Department

Long-term

numerical

integration

the stable region around be relative

Nanjing

using a symplectic

integrator

the triangular

large for the outer planets, and Mars.(AAnS

Recommended

1994,35,

point in the restricted Long-term

small for Mercury

Academy

of

University is used to examine

3-body

problem

con-

stable region is found to

and Venus, and non-existent

76-83)

sets of integration coefficients for solving differential equa-

tions of the form y” = F(X,Y) nomical station,

Chinese Academy

We use the maximum multistep

Chinese

of Astronomy,

sisting of the sun and an inner or outer planet. for Earth

Obseruatoy,

integration,

XU JI-HONG& ZHANG A-LI Urumqi Astroof Sciences,

order operator

especially

Xinjiang

to construct

for orders

830011

a series of formulas

8, 10, 12 and 14.

Application

scheme and Cowell’s scheme of the same order to the same celestial our scheme is much more accurate.

(AAnS

for linear of our

body shows that

1994,35,84-92)

The annual variation in the groud-based astronomical observational residuals caused by anomalous Geophysics,

Chinese Academy

Anomalous

refraction

refraction of Sciences,

GAO Bu-XI Institute

arising from tilting

of the equidensity

sphere varies with the season.

In this paper a formula

refraction

parameters

from meteorological

ation in the time and latitude by the anomalous

Methods scopes

refraction.

determinations

The following proposals

levels of the atmo-

for calculating

the anomalous

in China

can be partially

explained

(AAnS 1994,35,93-97)

of precise determination of Sciences,

and

is given. It is shown that the annual vari-

of light energy concentration

Su DING-QIANGNanjing Astronomical

nese Academy

of Geodesy

Wuchang 430077

Instruments

Reseawh

of tele-

Center,

Chi-

Nanjing 2lOO4t are made in this paper.

1) The calculation

of light energy

Abstracts

354

concentration diffracting

should integral,

be based

it is not necessary

error is small enough. if wave aberration wave aberration

apparatus (AAnS

A lo-30cm

is negligible is negligible

like the theoretical sub-aperture.

on the diffraction

2) for calculating

to know the fine wavefront,

sub-aperture

image,

then wave aberration

4) When the lo-30 cm sub-aperture But before

the test,

the

if high frequency

can be taken for the Hartmann

within such a sub-aperture.

or not, we can simply observe

diffraction

is necessary.

integral.

test,

3) To find whether a star image. is negligible

the

If it looks within

is used, the Shack-Hartmann

the star image should

the test

be examined.

1994,35,98-100)

The possibility of overtaking between the components of a superluminal source HONG XIAO-YU & SHEN ZHI-QIANG Shanghai Observatory, Chinese Academy of

Sciences,

Shanghai, 200030

On the basis of the relativistic overtaking

between

overtaking

may have happened

beaming

the components

model

we examine

of a superluminal

in 3C273.

source.

the possibility It is indicated

of that

(AApS 1994,14,118-123)

Monte Carlo simulation of quasar spectrum and selection effects in multicolor survey of high-redshift quasars FAN XIAO-HUI & CHENG JIAN-SHENG Beijing Astronomical Observatory, Chinese Academy of Sciences, Beijing 100080 Using well-established simulations

statistical

of the QSO spectrum

properties

at different

of QSO absorptions redshifts

the color indices in the UBVRI

is shown

(1) that

sequence

stars and (2) that for z > 3.0, faint &SOS and late-type

available

and certain

selection

comes from

confusion

limit in the U and B, and even V bands,

for identifying

used in high-redshift (AApS

for 2.4 < z < 3.0, selection

QSOs.

The limitations

QSO survey are discussed

Carlo

are made and then used to

calculate

the detection

system

Monte

making

of wide-band

function.

with main

dwarfs are outside fewer color indices

photometry

and narrow-band

It

currently

survey is suggested.

1994, 14, 124-136)

On the loss of angular momentum

in cataclysmic binaries

BI SHAO-LAN

Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011 The evolution

of cataclysmic

binaries

is studied

in detail.

If the loss of an-