Class information for:
Level 1: QUASARS GENERAL//ASTRONOMY & ASTROPHYSICS//QUASARS

Basic class information
Class id #P Avg. number of
references		 Database coverage
of references
6427 1485 29.4 52%


Bar chart of Publication_year

Last years might be incomplete

Hierarchy of classes
The table includes all classes above and classes immediately below the current class.


Cluster id Level Cluster label #P
19 4 ASTRONOMY & ASTROPHYSICS//ASTROPHYSICAL JOURNAL//ASTRON 523489
8 3       ASTRONOMY & ASTROPHYSICS//ASTROPHYSICAL JOURNAL//MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 146114
0 2             GALAXIES EVOLUTION//ASTRONOMY & ASTROPHYSICS//MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 61580
6427 1                   QUASARS GENERAL//ASTRONOMY & ASTROPHYSICS//QUASARS 1485

Terms with highest relevance score


rank Term termType Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with term
in class
1 QUASARS GENERAL authKW 111703 10% 4% 149
2 ASTRONOMY & ASTROPHYSICS WoSSC 79433 94% 0% 1399
3 QUASARS authKW 50943 2% 8% 33
4 PHYS XRAY ASTRON GRP address 42829 0% 42% 5
5 GODDARD SPACE FLIGHT LHEA address 41122 0% 100% 2
6 QUASAR GALAXY ASSOCIATIONS authKW 41122 0% 100% 2
7 QUASARS INDIVIDUAL 4C 3743 authKW 41122 0% 100% 2
8 QUASARS REDSHIFTS OF authKW 41122 0% 100% 2
9 ASTROPHYSICAL JOURNAL journal 37930 26% 0% 381
10 GALAXIES CLUSTERING authKW 36788 2% 5% 36

Web of Science journal categories


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with term
in class
1 Astronomy & Astrophysics 79433 94% 0% 1399
2 Physics, Multidisciplinary 26 4% 0% 56
3 Engineering, Aerospace 13 1% 0% 10
4 Multidisciplinary Sciences 4 1% 0% 8
5 Cultural Studies 0 0% 0% 1
6 Physics, Particles & Fields -0 1% 0% 14
7 Meteorology & Atmospheric Sciences -0 1% 0% 10
8 Materials Science, Composites -1 0% 0% 1
9 Education, Scientific Disciplines -2 0% 0% 1
10 Physics, Nuclear -2 1% 0% 8

Address terms


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 PHYS XRAY ASTRON GRP 42829 0% 42% 5
2 GODDARD SPACE FLIGHT LHEA 41122 0% 100% 2
3 OBSERV ASTRON CERRO CALAN 22341 0% 22% 5
4 950 N CHERRY AVE 20561 0% 100% 1
5 CNR GNA UNITA RIC 20561 0% 100% 1
6 CNRS UR 176 20561 0% 100% 1
7 CRIMEA STATION 20561 0% 100% 1
8 CRWG 20561 0% 100% 1
9 D NIAS XMM SURVEY SCI 20561 0% 100% 1
10 DAEC 5 PLACE JANSSEN 20561 0% 100% 1

Journals


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 ASTROPHYSICAL JOURNAL 37930 26% 0% 381
2 IAU SYMPOSIA 28103 7% 1% 104
3 ASTRONOMICAL JOURNAL 16086 7% 1% 106
4 MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 16028 13% 0% 186
5 ASTROPHYSICS AND SPACE SCIENCE 12761 6% 1% 89
6 ASTROPHYSICAL LETTERS & COMMUNICATIONS 9347 1% 2% 19
7 ASTRONOMY & ASTROPHYSICS 8999 10% 0% 150
8 ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 8468 3% 1% 44
9 JOURNAL OF ASTROPHYSICS AND ASTRONOMY 7604 1% 2% 20
10 PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 6843 3% 1% 42

Author Key Words


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class		 LCSH search Wikipedia search
1 QUASARS GENERAL 111703 10% 4% 149 Search QUASARS+GENERAL Search QUASARS+GENERAL
2 QUASARS 50943 2% 8% 33 Search QUASARS Search QUASARS
3 QUASAR GALAXY ASSOCIATIONS 41122 0% 100% 2 Search QUASAR+GALAXY+ASSOCIATIONS Search QUASAR+GALAXY+ASSOCIATIONS
4 QUASARS INDIVIDUAL 4C 3743 41122 0% 100% 2 Search QUASARS+INDIVIDUAL+4C+3743 Search QUASARS+INDIVIDUAL+4C+3743
5 QUASARS REDSHIFTS OF 41122 0% 100% 2 Search QUASARS+REDSHIFTS+OF Search QUASARS+REDSHIFTS+OF
6 GALAXIES CLUSTERING 36788 2% 5% 36 Search GALAXIES+CLUSTERING Search GALAXIES+CLUSTERING
7 QSOS 36548 0% 44% 4 Search QSOS Search QSOS
8 COSMOLOGY OBSERVATIONS DIFFUSE RADIATION 27413 0% 67% 2 Search COSMOLOGY+OBSERVATIONS+DIFFUSE+RADIATION Search COSMOLOGY+OBSERVATIONS+DIFFUSE+RADIATION
9 X RAY BACKGROUND 27409 0% 33% 4 Search X+RAY+BACKGROUND Search X+RAY+BACKGROUND
10 X RAYS SOURCES 24371 1% 11% 11 Search X+RAYS+SOURCES Search X+RAYS+SOURCES

Core articles
The table includes core articles in the class. The following variables is taken into account for the relevance score of an article in a cluster c:
(1) Number of references referring to publications in the class.
(2) Share of total number of active references referring to publications in the class.
(3) Age of the article. New articles get higher score than old articles.
(4) Citation rate, normalized to year.


Rank Reference # ref.
in cl.		 Shr. of ref. in
cl.		 Citations
1 HARTWICK, FDA , SCHADE, D , (1990) THE SPACE DISTRIBUTION OF QUASARS.ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS. VOL. 28. ISSUE . P. 437-489 85 71% 258
2 BENITEZ, N , SANZ, JL , MARTINEZ-GONZALEZ, E , (2001) QUASAR-GALAXY ASSOCIATIONS REVISITED.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. VOL. 320. ISSUE 2. P. 241 -248 31 72% 23
3 TIFFT, WG , (1995) REDSHIFT QUANTIZATION - A REVIEW.ASTROPHYSICS AND SPACE SCIENCE. VOL. 227. ISSUE 1-2. P. 25-39 30 94% 9
4 BURBIDGE, G , (1996) THE REALITY OF ANOMALOUS REDSHIFTS IN THE SPECTRA OF SOME QSOS AND ITS IMPLICATIONS.ASTRONOMY & ASTROPHYSICS. VOL. 309. ISSUE 1. P. 9 -22 43 61% 22
5 FABIAN, AC , BARCONS, X , (1992) THE ORIGIN OF THE X-RAY-BACKGROUND.ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS. VOL. 30. ISSUE . P. 429-456 42 62% 132
6 BURBIDGE, G , HEWITT, A , NARLIKAR, JV , GUPTA, PD , (1990) ASSOCIATIONS BETWEEN QUASI-STELLAR OBJECTS AND GALAXIES.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES. VOL. 74. ISSUE 3. P. 675-730 47 60% 28
7 MITCHELL, KJ , USHER, PD , (2004) FAINT BLUE OBJECTS AT HIGH GALACTIC LATITUDE. VIII. PERFORMANCE CHARACTERISTICS OF THE US SURVEY.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES. VOL. 153. ISSUE 1. P. 119 -157 45 37% 0
8 BURBIDGE, G , (2003) NGC 6212, 3C 345, AND OTHER QUASI-STELLAR OBJECTS ASSOCIATED WITH THEM.ASTROPHYSICAL JOURNAL. VOL. 586. ISSUE 2. P. L119 -L122 21 81% 4
9 GOSSET, E , MOREAU, O , SURDEJ, J , SWINGS, JP , ARP, HC , (1997) SURVEYS OF ULTRAVIOLET-EXCESS QUASAR CANDIDATES IN LARGE FIELDS - THE AREA AROUND NGC 450.ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES. VOL. 123. ISSUE 3. P. 529-568 31 65% 2
10 CARVALHO, JC , (1997) THE PERIODIC DISTRIBUTION OF REDSHIFTS.ASTROPHYSICS AND SPACE SCIENCE. VOL. 249. ISSUE 2. P. 227-234 22 81% 2

Classes with closest relation at Level 1


Rank Class id link
1 963 QUASARS GENERAL//GALAXIES ACTIVE//X RAYS GALAXIES
2 35139 3D SPECTROSCOPY OF GALAXIES VELOCITY FIELD HII REGIONS//CATALOGS ACTIVE//FOLLOW UP OBSERVATIONS
3 27714 CHRONOMETRIC THEORY//EUCLIDEAN ALGEBRA//INTERDISCIPLINARY NAT HUMANIST SCI
4 1637 QUASARS EMISSION LINES//GALAXIES ACTIVE//QUASARS GENERAL
5 36641 NI LOBACHEVSKII MATH MECH//RELATIVISTIC KINETICS//SCALAR INTERACTIONS
6 1383 QUASARS ABSORPTION LINES//INTERGALACTIC MEDIUM//GALAXIES QUASARS ABSORPTION LINES
7 9413 GALAXIES LUMINOSITY FUNCTION MASS FUNCTION//GALAXIES DWARF//GALAXIES PHOTOMETRY
8 21225 SERV ELE PHYS//JETS ACTIVE GALAXIES INTRACLUSTER MEDIUM//MULTIFREQUENCY ASTROPHYSICS COSMOLOGY
9 2855 GRAVITATIONAL LENSING//GRAVITATIONAL LENSING STRONG//QUASARS INDIVIDUAL Q22370305
10 4927 GALAXIES CLUSTERS GENERAL//GALAXIES CLUSTERING//GALAXIES DISTANCES AND REDSHIFTS

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