Recent Results From Advanced Satellite For Cosmology And Astrophysics
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Reports On Astronomy
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Author : Jacqueline Bergeron
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Reports On Astronomy written by Jacqueline Bergeron and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
IAU Transactions are published as a volume corresponding to each General Assembly. Volume A is produced prior to the Assembly and contains Reports on Astronomy, prepared by each Commission President. The intention is to summarize the astronomical results that have affected the work of the Commission since the production of the previous Reports up to a time which is about one year prior to the General Assembly. Volume B is produced after the Assembly and contains accounts of Commission Meetings which were held, together with other material. The reports included in the present volume range from outline summaries to lengthy compilations and references. Most reports are in English.
Frontiers Of Space And Ground Based Astronomy
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Author : Willem Wamsteker
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Frontiers Of Space And Ground Based Astronomy written by Willem Wamsteker and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
ROSAT Observations G. HASINGER Max-Planck-Institut flir 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 satel lites 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 measure ments 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.
15 Year Plan For X Ray Astronomy 1994 2008
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Author : United States. X-ray Astronomy Program Working Group
language : en
Publisher:
Release Date : 1994
15 Year Plan For X Ray Astronomy 1994 2008 written by United States. X-ray Astronomy Program Working Group and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with X-ray astronomy categories.
Space Exploration And Humanity 2 Volumes
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Author : American Astronautical Society
language : en
Publisher: Bloomsbury Publishing USA
Release Date : 2010-08-23
Space Exploration And Humanity 2 Volumes written by American Astronautical Society and has been published by Bloomsbury Publishing USA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-08-23 with Science categories.
A complete history of human endeavors in space, this book also moves beyond the traditional topics of human spaceflight, space technology, and space science to include political, social, cultural, and economic issues, and also commercial, civilian, and military applications. In two expertly written volumes, Space Exploration and Humanity: A Historical Encyclopedia covers all aspects of space flight in all participating nations, ranging from the Cold War–era beginnings of the space race to the lunar landings and the Apollo-Soyuz mission; from the Shuttle disasters and the Hubble telescope to Galileo, the Mars Rover, and the International Space Station. The book moves beyond the traditional topics of human spaceflight, space technology, and space science to include political, social, cultural, and economic issues, and also commercial, civilian, and military applications. Produced in conjunction with the History Committee of the American Astronautical Society, this work divides its coverage into six sections, each beginning with an overview essay, followed by an alphabetically organized series of entries on topics such as astrophysics and planetary science; civilian and commercial space applications; human spaceflight and microgravity science; space and society; and space technology and engineering. Whether investigating a specific issue or event or tracing an overarching historic trend, students and general readers will find this an invaluable resource for launching their study of one of humanity's most extraordinary endeavors.
Research And Technology
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Author : Goddard Space Flight Center
language : en
Publisher:
Release Date : 1995
Research And Technology written by Goddard Space Flight Center and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Astronautics categories.
A New Science Strategy For Space Astronomy And Astrophysics
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 1997-07-06
A New Science Strategy For Space Astronomy And Astrophysics written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-07-06 with Science categories.
Literature 1997 Part 1
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Author : Astronomisches Rechen-InstitutARI
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-11
Literature 1997 Part 1 written by Astronomisches Rechen-InstitutARI and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-11 with Science categories.
Astronomy and Astrophysics Abstracts is devoted to the recording, summarizing and indexing of astronomical publications throughout the world. Two volumes are scheduled to appear per year. Volume 67 records 10,903 papers covering besides the classical fields of astronomy and astrophysics such matters as space flights related to astronomy, lunar and planetary probes and satellites, meteorites and interplanetary matter, X rays and cosmic rays, quasars and pulsars. The abstracts are classified under more than one hundred subject categories thus permitting quick surveying of the bulk of material published on the same topic within six months. For instance, this volume records 119 papers on minor planets, 155 papers on supernovae, and 554 papers on cosmology.
Astronomy And Astrophysics In The New Millennium
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 2001-02-16
Astronomy And Astrophysics In The New Millennium written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-02-16 with Science categories.
In this new book, a distinguished panel makes recommendations for the nation's programs in astronomy and astrophysics, including a number of new initiatives for observing the universe. With the goal of optimum value, the recommendations address the role of federal research agencies, allocation of funding, training for scientists, competition and collaboration among space facilities, and much more. The book identifies the most pressing science questions and explains how specific efforts, from the Next Generation Space Telescope to theoretical studies, will help reveal the answers. Discussions of how emerging information technologies can help scientists make sense of the wealth of data available are also included. Astronomy has significant impact on science in general as well as on public imagination. The committee discusses how to integrate astronomical discoveries into our education system and our national life. In preparing the New Millennium report, the AASC made use of a series of panel reports that address various aspects of ground- and space-based astronomy and astrophysics. These reports provide in-depth technical detail. Astronomy and Astrophysics in the New Millenium: An Overview summarizes the science goals and recommended initiatives in a short, richly illustrated, non-technical booklet.
Encyclopedia Of Astronomy Astrophysics
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Author : P Murdin
language : en
Publisher: CRC Press
Release Date : 2001-01-01
Encyclopedia Of Astronomy Astrophysics written by P Murdin and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-01-01 with Science categories.
In a unique collaboration, Nature Publishing Group and Institute of Physics Publishing have published the most extensive and comprehensive reference work in astronomy and astrophysics. This unique resource covers the entire field of astronomy and astrophysics and this online version includes the full text of over 2,750 articles, plus sophisticated search and retrieval functionality and links to the primary literature. The Encyclopaedia's authority is assured by editorial and advisory boards drawn from the world's foremost astronomers and astrophysicists. This first class resource is an essential source of information for undergraduates, graduate students, researchers and seasoned professionals, as well as for committed amateurs, librarians and lay people wishing to consult the definitive astronomy and astrophysics reference work.
The Army Communicator
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Author :
language : en
Publisher:
Release Date : 2000
The Army Communicator written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Communications, Military categories.