Frontiers of Space And Ground-Based Astronomy The Astrophysics of the 21st Century
Gespeichert in:
| Weitere Verfasser: | , , |
|---|---|
| Format: | Elektronisch E-Book |
| Sprache: | English |
| Veröffentlicht: |
Dordrecht
Springer Netherlands
1994
|
| Schriftenreihe: | Astrophysics and Space Science Library
187 |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
MARC
| LEADER | 00000nam a2200000zcb4500 | ||
|---|---|---|---|
| 001 | BV042415761 | ||
| 003 | DE-604 | ||
| 005 | 20210324 | ||
| 007 | cr|uuu---uuuuu | ||
| 008 | 150316s1994 xx o|||| 00||| eng d | ||
| 020 | |a 9789401107945 |c Online |9 978-94-011-0794-5 | ||
| 020 | |a 9789401043410 |c Print |9 978-94-010-4341-0 | ||
| 024 | 7 | |a 10.1007/978-94-011-0794-5 |2 doi | |
| 035 | |a (OCoLC)905427446 | ||
| 035 | |a (DE-599)BVBBV042415761 | ||
| 040 | |a DE-604 |b ger |e aacr | ||
| 041 | 0 | |a eng | |
| 049 | |a DE-91 |a DE-83 | ||
| 082 | 0 | |a 520 |2 23 | |
| 084 | |a PHY 000 |2 stub | ||
| 245 | 1 | 0 | |a Frontiers of Space And Ground-Based Astronomy |b The Astrophysics of the 21st Century |c edited by W. Wamsteker, M. S. Longair, Y. Kondo |
| 264 | 1 | |a Dordrecht |b Springer Netherlands |c 1994 | |
| 300 | |a 1 Online-Ressource (XXIII, 750 p) | ||
| 336 | |b txt |2 rdacontent | ||
| 337 | |b c |2 rdamedia | ||
| 338 | |b cr |2 rdacarrier | ||
| 490 | 1 | |a Astrophysics and Space Science Library |v 187 |x 0067-0057 | |
| 500 | |a ROSAT Observations G. HASINGER Max-Planck-Institut für extraterrestrische Physik, D-85740 Garching, Germany Abstract. This review describes the most recent advances in the study of the extragalactic soft X-ray background and what we can learn about its constituents. The deepest pointed observations with the ROSAT PSPC are discussed. The logN-logS relation is presented, which reaches to the faintest X-ray fluxes and to the highest AGN surface densities ever achieved. The N(>S) relation shows a 2 density in excess of 400 deg- at the faintest fluxes and a flattening below the Einstein Deep Survey limit. About 60% of the extragalactic background has been resolved in the deepest field. Detailed source spectra and first optical and radio identifications will be discussed. The results are put into perspective of the higher energy X-ray background. Key words: X-rays, background radiations, active galactic nuclei. 1. Introduction The extragalactic X-ray background (XRB), discovered about 30 years ago, has been studied extensively with many X-ray experiments, in particular with the satellites HEAO I and II (see ego Boldt 1987) and with ROSAT (e. g. Hasinger et aI. , 1993). Figure 1 shows a compilation of some of the most recent spectral measurements for the X-ray background. Over the energy range from 3 to about 100 keY its spectrum can be well approximated by an optically thin thermal bremsstrahlung model with kT ~ 40 keY, while at lower X-ray energies a steepening into a new component has been observed observed (e. g | ||
| 650 | 4 | |a Physics | |
| 650 | 4 | |a Astronomy, Observations and Techniques | |
| 650 | 4 | |a Classical and Quantum Gravitation, Relativity Theory | |
| 700 | 1 | |a Wamsteker, Willem |0 (DE-588)1066981760 |4 edt | |
| 700 | 1 | |a Longair, Malcolm |d 1941- |0 (DE-588)120637561 |4 edt | |
| 700 | 1 | |a Kondo, Y. |4 edt | |
| 830 | 0 | |a Astrophysics and Space Science Library |v 187 |w (DE-604)BV000000296 |9 187 | |
| 856 | 4 | 0 | |u https://doi.org/10.1007/978-94-011-0794-5 |x Verlag |3 Volltext |
| 912 | |a ZDB-2-PHA | ||
| 912 | |a ZDB-2-BAE | ||
| 940 | 1 | |q ZDB-2-PHA_Archive | |
| 943 | 1 | |a oai:aleph.bib-bvb.de:BVB01-027851254 | |
Datensatz im Suchindex
| DE-BY-TUM_katkey | 2065077 |
|---|---|
| _version_ | 1820888414602395648 |
| any_adam_object | |
| author2 | Wamsteker, Willem Longair, Malcolm 1941- Kondo, Y. |
| author2_role | edt edt edt |
| author2_variant | w w ww m l ml y k yk |
| author_GND | (DE-588)1066981760 (DE-588)120637561 |
| author_facet | Wamsteker, Willem Longair, Malcolm 1941- Kondo, Y. |
| building | Verbundindex |
| bvnumber | BV042415761 |
| classification_tum | PHY 000 |
| collection | ZDB-2-PHA ZDB-2-BAE |
| ctrlnum | (OCoLC)905427446 (DE-599)BVBBV042415761 |
| dewey-full | 520 |
| dewey-hundreds | 500 - Natural sciences and mathematics |
| dewey-ones | 520 - Astronomy and allied sciences |
| dewey-raw | 520 |
| dewey-search | 520 |
| dewey-sort | 3520 |
| dewey-tens | 520 - Astronomy and allied sciences |
| discipline | Physik |
| doi_str_mv | 10.1007/978-94-011-0794-5 |
| format | Electronic eBook |
| fullrecord | <?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>03117nam a2200445zcb4500</leader><controlfield tag="001">BV042415761</controlfield><controlfield tag="003">DE-604</controlfield><controlfield tag="005">20210324 </controlfield><controlfield tag="007">cr|uuu---uuuuu</controlfield><controlfield tag="008">150316s1994 xx o|||| 00||| eng d</controlfield><datafield tag="020" ind1=" " ind2=" "><subfield code="a">9789401107945</subfield><subfield code="c">Online</subfield><subfield code="9">978-94-011-0794-5</subfield></datafield><datafield tag="020" ind1=" " ind2=" "><subfield code="a">9789401043410</subfield><subfield code="c">Print</subfield><subfield code="9">978-94-010-4341-0</subfield></datafield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1007/978-94-011-0794-5</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(OCoLC)905427446</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)BVBBV042415761</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-604</subfield><subfield code="b">ger</subfield><subfield code="e">aacr</subfield></datafield><datafield tag="041" ind1="0" ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="049" ind1=" " ind2=" "><subfield code="a">DE-91</subfield><subfield code="a">DE-83</subfield></datafield><datafield tag="082" ind1="0" ind2=" "><subfield code="a">520</subfield><subfield code="2">23</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">PHY 000</subfield><subfield code="2">stub</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Frontiers of Space And Ground-Based Astronomy</subfield><subfield code="b">The Astrophysics of the 21st Century</subfield><subfield code="c">edited by W. Wamsteker, M. S. Longair, Y. Kondo</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="a">Dordrecht</subfield><subfield code="b">Springer Netherlands</subfield><subfield code="c">1994</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">1 Online-Ressource (XXIII, 750 p)</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="490" ind1="1" ind2=" "><subfield code="a">Astrophysics and Space Science Library</subfield><subfield code="v">187</subfield><subfield code="x">0067-0057</subfield></datafield><datafield tag="500" ind1=" " ind2=" "><subfield code="a">ROSAT Observations G. HASINGER Max-Planck-Institut für extraterrestrische Physik, D-85740 Garching, Germany Abstract. This review describes the most recent advances in the study of the extragalactic soft X-ray background and what we can learn about its constituents. The deepest pointed observations with the ROSAT PSPC are discussed. The logN-logS relation is presented, which reaches to the faintest X-ray fluxes and to the highest AGN surface densities ever achieved. The N(>S) relation shows a 2 density in excess of 400 deg- at the faintest fluxes and a flattening below the Einstein Deep Survey limit. About 60% of the extragalactic background has been resolved in the deepest field. Detailed source spectra and first optical and radio identifications will be discussed. The results are put into perspective of the higher energy X-ray background. Key words: X-rays, background radiations, active galactic nuclei. 1. Introduction The extragalactic X-ray background (XRB), discovered about 30 years ago, has been studied extensively with many X-ray experiments, in particular with the satellites HEAO I and II (see ego Boldt 1987) and with ROSAT (e. g. Hasinger et aI. , 1993). Figure 1 shows a compilation of some of the most recent spectral measurements for the X-ray background. Over the energy range from 3 to about 100 keY its spectrum can be well approximated by an optically thin thermal bremsstrahlung model with kT ~ 40 keY, while at lower X-ray energies a steepening into a new component has been observed observed (e. g</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Physics</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Astronomy, Observations and Techniques</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Classical and Quantum Gravitation, Relativity Theory</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Wamsteker, Willem</subfield><subfield code="0">(DE-588)1066981760</subfield><subfield code="4">edt</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Longair, Malcolm</subfield><subfield code="d">1941-</subfield><subfield code="0">(DE-588)120637561</subfield><subfield code="4">edt</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Kondo, Y.</subfield><subfield code="4">edt</subfield></datafield><datafield tag="830" ind1=" " ind2="0"><subfield code="a">Astrophysics and Space Science Library</subfield><subfield code="v">187</subfield><subfield code="w">(DE-604)BV000000296</subfield><subfield code="9">187</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.1007/978-94-011-0794-5</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-2-PHA</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-2-BAE</subfield></datafield><datafield tag="940" ind1="1" ind2=" "><subfield code="q">ZDB-2-PHA_Archive</subfield></datafield><datafield tag="943" ind1="1" ind2=" "><subfield code="a">oai:aleph.bib-bvb.de:BVB01-027851254</subfield></datafield></record></collection> |
| id | DE-604.BV042415761 |
| illustrated | Not Illustrated |
| indexdate | 2024-12-24T04:23:12Z |
| institution | BVB |
| isbn | 9789401107945 9789401043410 |
| issn | 0067-0057 |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-027851254 |
| oclc_num | 905427446 |
| open_access_boolean | |
| owner | DE-91 DE-BY-TUM DE-83 |
| owner_facet | DE-91 DE-BY-TUM DE-83 |
| physical | 1 Online-Ressource (XXIII, 750 p) |
| psigel | ZDB-2-PHA ZDB-2-BAE ZDB-2-PHA_Archive |
| publishDate | 1994 |
| publishDateSearch | 1994 |
| publishDateSort | 1994 |
| publisher | Springer Netherlands |
| record_format | marc |
| series | Astrophysics and Space Science Library |
| series2 | Astrophysics and Space Science Library |
| spellingShingle | Frontiers of Space And Ground-Based Astronomy The Astrophysics of the 21st Century Astrophysics and Space Science Library Physics Astronomy, Observations and Techniques Classical and Quantum Gravitation, Relativity Theory |
| title | Frontiers of Space And Ground-Based Astronomy The Astrophysics of the 21st Century |
| title_auth | Frontiers of Space And Ground-Based Astronomy The Astrophysics of the 21st Century |
| title_exact_search | Frontiers of Space And Ground-Based Astronomy The Astrophysics of the 21st Century |
| title_full | Frontiers of Space And Ground-Based Astronomy The Astrophysics of the 21st Century edited by W. Wamsteker, M. S. Longair, Y. Kondo |
| title_fullStr | Frontiers of Space And Ground-Based Astronomy The Astrophysics of the 21st Century edited by W. Wamsteker, M. S. Longair, Y. Kondo |
| title_full_unstemmed | Frontiers of Space And Ground-Based Astronomy The Astrophysics of the 21st Century edited by W. Wamsteker, M. S. Longair, Y. Kondo |
| title_short | Frontiers of Space And Ground-Based Astronomy |
| title_sort | frontiers of space and ground based astronomy the astrophysics of the 21st century |
| title_sub | The Astrophysics of the 21st Century |
| topic | Physics Astronomy, Observations and Techniques Classical and Quantum Gravitation, Relativity Theory |
| topic_facet | Physics Astronomy, Observations and Techniques Classical and Quantum Gravitation, Relativity Theory |
| url | https://doi.org/10.1007/978-94-011-0794-5 |
| volume_link | (DE-604)BV000000296 |
| work_keys_str_mv | AT wamstekerwillem frontiersofspaceandgroundbasedastronomytheastrophysicsofthe21stcentury AT longairmalcolm frontiersofspaceandgroundbasedastronomytheastrophysicsofthe21stcentury AT kondoy frontiersofspaceandgroundbasedastronomytheastrophysicsofthe21stcentury |