当前位置:文档之家 > Statistical Algorithms for Identification of Astronomical X-Ray Sources

Statistical Algorithms for Identification of Astronomical X-Ray Sources

Statistical Algorithms for Identification of Astronomical X-Ray Sources

a r

X

i

v

:a

s t

r o

-

p

h

/

6

8

5

3

0v

2

1

9

D

e

c

2

7

Astron.Nachr./AN 000,No.00,1–23(0000)/DOI please set DOI!⋆Corresponding author:e-mail:hz@mssl.ucl.ac.uk ferent classes of Active Galactic Nuclei (AGN)(Miyaji et al.2000;Barger et al.2001a;Komossa &Hasinger 2002;Brandt &Kaspi 2003;Cowie et al.2003;Bauer et al.2004),their intrinsic absorption (Kim &Elvis 1999;Wilkes 2002;Comastri et al.(2002);Matt et al.2003)and their relation-ship with the characteristics of the host galaxy,its star for-mation history (Ghosh 2002;Sipior et al.2003;Cohen 2003;King 2004;Norman et al.2004;Silverman et al.2005)and the central super-massive black hole (Barger et al.2001b;Granato et al.2002;Brandt et al.2002).Observations have also revealed the relation between hard X-ray sources,hid-den broad line AGN(BLAGN)or BL-Lac(Ueda et al.2003;Comastri et al.2003;Piconcelli et al.2003)and X-ray back-ground in hard (Gandhi &Fabian 2003;Giacconi et al.2001;Tozzi et al.2001;De Luca &Molendi 2004;Silva et al.2004)and soft bands (Soltan et al.2005).Although these observations have significantly improv-ed our knowledge about X-ray sources (Page et al.2000;Maiolino et al.2000;Risaliti et al.2000),they only include relatively small number of spectroscopically identified X-ray objects.Despite the fact that they belong to randomly selected fields,it is not certain how much other criteria such as brightness of the optical counterparts and the tendency to study special classes of sourc
es more than others,influ-ence conclusions about populations and their physical con-ditions.Thus,it seems that much larger and unbiased sam-ples representing different category of objects,with both typical characteristics of the population,and from extreme

Astron.Nachr./AN 000,No.00,1–23(0000)/DOI please set DOI!⋆Corresponding author:e-mail:hz@mssl.ucl.ac.uk ferent classes of Active Galactic Nuclei (AGN)(Miyaji et al.2000;Barger et al.2001a;Komossa &Hasinger 2002;Brandt &Kaspi 2003;Cowie et al.2003;Bauer et al.2004),their intrinsic absorption (Kim &Elvis 1999;Wilkes 2002;Comastri et al.(2002);Matt et al.2003)and their relation-ship with the characteristics of the host galaxy,its star for-mation history (Ghosh 2002;Sipior et al.2003;Cohen 2003;King 2004;Norman et al.2004;Silverman et al.2005)and the central super-massive black hole (Barger et al.2001b;Granato et al.2002;Brandt et al.2002).Observations have also revealed the relation between hard X-ray sources,hid-den broad line AGN(BLAGN)or BL-Lac(Ueda et al.2003;Comastri et al.2003;Piconcelli et al.2003)and X-ray back-ground in hard (Gandhi &Fabian 2003;Giacconi et al.2001;Tozzi et al.2001;De Luca &Molendi 2004;Silva et al.2004)and soft bands (Soltan et al.2005).Although these observations have significantly improv-ed our knowledge about X-ray sources (Page et al.2000;Maiolino et al.2000;Risaliti et al.2000),they only include relatively small number of spectroscopically identified X-ray objects.Despite the fact that they belong to randomly selected fields,it is not certain how much other criteria such as brightness of the optical counterparts and the tendency to study special classes of sources more than others,influ-ence conclusions about populations and their physical con-ditions.Thus,it seems that much larger and unbiased sam-ples representing different category of objects,with both typical characteristics of the population,and from extreme

parts of the observable parameter space are necessary.It is

c 0000WILEY-VCH Verlag GmbH &Co.KGaA,Weinheim

Discovery, identification, and study of variability in gamma-ray point sources

Discovery, identification, and study of variability in gamma-ray point ...In fact many astronomical sources (as AGNs, black hole X-ray binary ...

X-ray Emitting QSOs Ejected from Arp 220

X-ray sources very close to the nearby ultra...at Xinlong Station, Beijing Astronomical Observatory...somewhat the statistical probability of orientation....

Population synthesis of X-ray sources at the Galactic center

Population synthesis of X-ray sources at the Galactic center_专业资料。X-...Prokhorov Sternberg Astronomical Institute, Universitetskij pr. 13, 119899 ...

On Black Hole Mass Estimation from X-ray Spectra of Ultraluminous X-ray Sources

Astronomical Society of Japan. On Black Hole Mass Estimation from X-ray Spectra of Ultraluminous X-ray Sources Kiki Vierdayanti1,? , Ken-ya Watarai2,...

X-ray emission from the PSR B1259--63 system near apastron

Belloni Astronomical Institute ”A. Pannekoek”, ...gure. 4 X-ray sources, it is known that the...within the statistical uncertainty of a typical o...

Face-on SS433 stars as a possible new type of extragalactic X-ray sources

SS433 stars as a possible new type of extragalactic X-ray sources_...Mescheryakov Sternberg Astronomical Institute, Moscow, Russia (email: shura@...

Discovery of high-amplitude X-ray variability in the Seyfert-LINER transition galaxy NGC758

Germany u National Astronomical Observatories, Chinese Academy of Sciences, ...ux variations in the X-ray sources of the XMM Serendipitous Survey compared...

Massive star-formation rates of gamma-ray burst host galaxies an unobscured view in X-rays

Astronomical Observatory, University of Copenhagen,...statistical properties of the combined emission of ...We found a faint X-ray point source with a ?...

Cosmological Implications of Number Counts of Clusters of Galaxies logN-logS in X-Ray and S

extended — X-rays : sources Publications of the Astronomical Society of ... into account the incompleteness of the observed data and large statistical ...

Hard X-ray variability of Magnetar's Tails observed with INTEGRAL

(Roma), Italy University of Amsterdam, Astronomical Institute "Anton Pannekoek...& Thompson, C., in "Compact Stellar X-ray Sources", eds. W.H.G. ...