X
Search Filters
Format Format
Subjects Subjects
Subjects Subjects
X
Sort by Item Count (A-Z)
Filter by Count
hellas2xmm survey (126) 126
astronomy & astrophysics (125) 125
galaxies: active (101) 101
active galactic nuclei (84) 84
astrophysics (84) 84
x-rays: galaxies (75) 75
high energy astrophysical phenomena (69) 69
cosmology and extragalactic astrophysics (68) 68
galaxy astrophysics (62) 62
physics - cosmology and nongalactic astrophysics (61) 61
physics - astrophysics of galaxies (57) 57
physics - high energy astrophysical phenomena (56) 56
galaxies : active (53) 53
physics - earth and planetary astrophysics (53) 53
physics - instrumentation and methods for astrophysics (53) 53
physics - solar and stellar astrophysics (53) 53
surveys (50) 50
x-rays : galaxies (42) 42
galaxies (35) 35
luminosity function (33) 33
supermassive black-holes (32) 32
digital sky survey (31) 31
x-rays: general (29) 29
luminosity (26) 26
x-rays: diffuse background (26) 26
quasars: general (25) 25
galaxies: nuclei (24) 24
x-ray sources (23) 23
optical identifications (22) 22
astrophysics - cosmology and nongalactic astrophysics (21) 21
x-rays : diffuse background (21) 21
x-rays : general (21) 21
galaxies: seyfert (20) 20
deep field-south (19) 19
host galaxies (18) 18
star-forming galaxies (18) 18
infrared: galaxies (17) 17
spectral properties (17) 17
x-rays (17) 17
xmm-newton (17) 17
quasars (16) 16
red shift (16) 16
seyfert 2 galaxies (16) 16
quasars : general (15) 15
seyfert-galaxies (15) 15
star-formation (15) 15
astrophysics - high energy astrophysical phenomena (14) 14
astrophysics, cosmology and astronomy (14) 14
evolution (14) 14
galaxy nuclei (14) 14
north survey (14) 14
number counts (14) 14
astrophysics - astrophysics of galaxies (13) 13
xmm-newton observations (13) 13
astronomy (12) 12
emission (12) 12
field north survey (12) 12
x‐rays: galaxies (12) 12
black holes (11) 11
catalogs (11) 11
galaxies: evolution (11) 11
spectral energy-distributions (11) 11
cosmological evolution (10) 10
cosmology: observations (10) 10
multiwavelength observations (10) 10
optical properties (10) 10
source catalogs (10) 10
x-ray galaxies (10) 10
black-holes (9) 9
chandra (9) 9
chandra multiwavelength project (9) 9
cosmic x-ray sources (9) 9
galaxies: high-redshift (9) 9
photometric redshifts (9) 9
spectral-analysis (9) 9
stars & galaxies (9) 9
x ray astronomy (9) 9
digital-sky-survey (8) 8
galaxies : nuclei (8) 8
galaxies : seyfert (8) 8
medium-sensitivity survey (8) 8
quasars: emission lines (8) 8
ultraluminous infrared galaxies (8) 8
x radiation (8) 8
absorption (7) 7
black hole physics (7) 7
bright serendipitous survey (7) 7
cosmology : observations (7) 7
energy-distributions (7) 7
galaxies : evolution (7) 7
infrared : galaxies (7) 7
physical properties (7) 7
rosat deep survey (7) 7
solar and stellar astrophysics (7) 7
spectra (7) 7
stars (7) 7
xmm (7) 7
x‐rays: diffuse background (7) 7
cosmic ray sources (6) 6
deep field (6) 6
more...
Language Language
Publication Date Publication Date
Click on a bar to filter by decade
Slide to change publication date range


Astronomy and Astrophysics, ISSN 0004-6361, 01/2009, Volume 493, Issue 1, pp. 339 - 373
Journal Article
ASTRONOMY & ASTROPHYSICS, ISSN 0004-6361, 12/2007, Volume 476, Issue 3, pp. 1191 - U35
Aims. X-ray sources at intermediate fluxes (a few x 10(-14) erg cm(-2) s(-1)) with a sky density of similar to 100 deg(-2) are responsible for a significant... 
X-rays : general | LOG S-RELATION | HELLAS2XMM SURVEY | FIELD | DEEP ROSAT SURVEY | FOLLOW-UP | X-rays : stars | X-rays : galaxies | X-RAY SOURCES | LOCKMAN HOLE | ACTIVE GALACTIC NUCLEI | ASTRONOMY & ASTROPHYSICS | CHANDRA MULTIWAVELENGTH PROJECT | SOURCE CATALOG | galaxies : active
Journal Article
ASTRONOMY & ASTROPHYSICS, ISSN 0004-6361, 04/2009, Volume 497, Issue 2, pp. 635 - 648
Journal Article
Monthly Notices of the Royal Astronomical Society, ISSN 0035-8711, 2013, Volume 431, Issue 1, pp. 978 - 996
Journal Article
The Astrophysical Journal, ISSN 0004-637X, 06/2010, Volume 716, Issue 1, pp. 348 - 369
Journal Article
Astronomy and Astrophysics, ISSN 0004-6361, 2011, Volume 528, p. A122
Aims. An accurate census of the active galactic nuclei (AGN) is a key step in investigating the nature of the correlation between the growth and evolution of... 
surveys | X-rays: general | galaxies: active | catalogs | HELLAS2XMM SURVEY | LOCKMAN-HOLE | POINT-SOURCE CATALOGS | EVOLUTION | COSMOS FIELD | NORTH SURVEY | MS SOURCE CATALOGS | ASTRONOMY & ASTROPHYSICS | CHANDRA MULTIWAVELENGTH PROJECT | SOUTH SURVEY | N-LOG S | Physics - High Energy Astrophysical Phenomena
Journal Article
The Astrophysical Journal, ISSN 0004-637X, 05/2009, Volume 696, Issue 2, pp. 1195 - 1212
We present optical spectroscopy for an X-ray and optical flux-limited sample of 677 XMM-Newton selected targets covering the 2 deg(2) Cosmic Evolution Survey... 
surveys | galaxies: Seyfert | quasars: general | galaxies: active | X-rays: galaxies | OPTICAL IDENTIFICATIONS | HELLAS2XMM SURVEY | STAR-FORMING GALAXIES | X-RAY BRIGHT | FIELD NORTH SURVEY | DIGITAL SKY SURVEY | DEEP SURVEY | ASTRONOMY & ASTROPHYSICS | CHANDRA MULTIWAVELENGTH PROJECT | BROAD EMISSION-LINES | BRIGHT QUASAR SURVEY
Journal Article
Astronomy and Astrophysics, ISSN 0004-6361, 07/2007, Volume 469, Issue 1, pp. 27 - 46
Journal Article
Journal Article
The Astrophysical Journal Supplement Series, ISSN 0067-0049, 09/2007, Volume 172, Issue 1, pp. 353 - 367
Journal Article