Frontiers Of Space And Ground Based Astronomy

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.

Frontiers Of Space And Ground Based Astronomy

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.

Information On Line Data in Astronomy

[5] Egret, D., Wenger, M., Dubois, P, 1991: "The SIMBAD astronomical database' ... of Frontiers of Space and Ground-based Astronomy, Kluwer, 1994, in press.

Information   On Line Data in Astronomy

The ability of storing, managing, and giving access to the huge quantity of data collected by astronomical observatories is one of the major challenges of modern astronomy. At the same time, the growing complexity of data systems implies a change of concepts: the scientist has to manipulate data as well as information. Recent developments of the `WorldWideWeb' bring interesting answers to these problems. The book presents a wide selection of databases, archives, data centers, and information systems. Clear and up-to-date descriptions are included, together with their scientific context and motivations. Audience: This volume provides an essential tool for astronomers, librarians, data specialists and computer engineers.

Handbook of CCD Astronomy

McLean , I. S. , 1997a , Electronic Imaging in Astronomy , Wiley , Chapter 5 . ... C. L. , 1994 , in Frontiers of Space and Ground - Based Astronomy , eds .

Handbook of CCD Astronomy

A concise and accessible reference on the practical use of CCDs.

The Deep Universe

In The Frontiers of Space and Ground-based Astronomy, 27th ESLAB Symposium, (eds. W. Wamsteker, M.S. Longair and Y. Kondo), (in press).

The Deep Universe

Written by three celebrated astronomers renowned for their excellence in both research and teaching, the central theme is approached in three complementary ways: the smooth evolution of the universe from the Big Bang to the present structures of matter; as a meandering road paved by our observations of stars, galaxies, and clusters; and how these approaches have been gradually developed and intertwined in the historical process leading to modern-day cosmology.

The Gamma Ray Sky with Compton GRO and SIGMA

... of 27" ESLAB Symposium "Frontiers of Space and Ground-based Astronomy" (Noordwijk), in press Bouchet L. et al.: 1991, Ap/ 383, L45 Bouchet L. et al.

The Gamma Ray Sky with Compton GRO and SIGMA

This volume consists of invited lectures and seminars presented at the NATO Advanced Study Institute "The Gamma Ray Sky with COMPTON GRO and SIGMA" , which was held at the Centre de Physique Theorique of Les Houches (France) in January / February 1994. The school has been planned by a Scientific Organizing Committee. It was organized with the aim of providing students and young researchers with an up-to-date account of the high-energy phenomena in the vicinity of compact objets and the diffuse gamma-ray backgrounds after the early results from the gamma-ray telescope SIGMA and the four instruments onboard COMPTON GRO (Gamma Ray Observatory) : BATSE (Burst and Transient Source Experiment),COMPTEL(Compto'l Telescope),EGRET (Energetic Gamma Ray Experiment Telescope) and OS SE(Oriented Scintillation Spectrometer Experiment) . It was attended by more than sixty researchers from many countries. The lectures and seminars represent a complete coverage of our present knowledge and understanding of: Gamma-ray backgrounds, Gamma-ray Burts,Active Galactic Nuclei,Galactic Compact Objects, Gamma-ray Spectroscopy, Instrumentation and observation techniques, etc ... Most of these lectures are reproduced in this volume. Unfortunately, a few lecturers have chosen not to submit their manuscript.

Astronomical Time Series

FUTURE ROLE OF THE WISE OBSERVATORY AND OTHER SMALL TELESCOPES While future ... Stirpe, G. M. 1994, in Frontiers of Space and Ground-Based Astronomy, ed.

Astronomical Time Series

ELlA M. LEIBOWITZ Director, Wise Observatory Chair, Scientific Organizing Committee The international symposium on "Astronomical Time Series" was held at the Tel Aviv University campus in Tel Aviv, from December 30 1996 to January 11997. It was organized in order to celebrate the 25th anniversary of the Florence and George Wise Observatory (WO) operated by Tel Aviv University. The site of the 1 meter telescope of the observatory is near the town of Mitzpe-Ramon, some 220 km south of Tel Aviv, at the center of the Israeli Negev highland. There were two major reasons for the choice of Time Series as the sub ject matter for our symposium. One is mainly concerned with the subject matter itself, and one is related particularly to the Wise Observatory. There is hardly any doubt that astronomical time series are among the most ancient concepts in human civilization and culture. One can even say that astronomical time series preceeded astronomy itself, as the impression of the day /night cycle on Earth is probably the first and most fundamental effect that impress a. human being, or, in fact, most living creatures on this planet. An echo of this idea. can be heard in the Biblical story of Creation, where the concept of night and day preceeds the creation of the astronomical objects.

High Sensitivity Radio Astronomy

Downes , D. 1994 , in Frontiers of Space and Ground - Based Astronomy , eds . W. Wamsteker , M. Longair , Y. Kondo , Kluwer , Dordrecht p . 133 .

High Sensitivity Radio Astronomy

Enhanced sensitivity radio telescopes are producing dramatic results. An international conference was held in Jodrell Bank to take stock of these advances. This timely volume presents the review articles presented by a host of world experts who gathered at this meeting. We are shown how high sensitivity is advancing our understanding in radio spectral line analysis, radio continuum observations of galaxies, cosmology, pulsars, and radio emission from stars; what new and enhanced instruments are now available and those planned for the future. This volume provides graduate students and researchers with an up-to-date and wide-ranging review of the new and future research possible with high-sensitivity radio telescopes.

International Aerospace Abstracts

In : Frontiers of space and ground - based astronomy : The astrophysics of the 21st century ; Proceedings of the 27th ESLAB Symposium , Noordwijk , Netherlands , May 10-14 , 1993 ( A95-44977 12-89 ) . Dordrecht , Netherlands , Kluwer ...

International Aerospace Abstracts


Plasma Astrophysics

Volume 193: Dusty and Self-Gravitational Plasmas in Space Authors: Pavel ... October 1993 Volume 187: Frontiers of Space and Ground-Based Astronomy The ...

Plasma Astrophysics

This textbook is intended as an introduction to the physics of solar and stellar coronae, emphasizing kinetic plasma processes. It is addressed to observational astronomers, graduate students, and advanced undergraduates without a ba- ground in plasma physics. Coronal physics is today a vast field with many different aims and goals. So- ing out the really important aspects of an observed phenomenon and using the physics best suited for the case is a formidable problem. There are already several excellent books, oriented toward the interests of astrophysicists, that deal with the magnetohydrodynamics of stellar atmospheres, radiation transport, and radiation theory. In kinetic processes, the different particle velocities play an important role. This is the case when particle collisions can be neglected, for example in very brief phenomena – such as one period of a high-frequency wave – or in effects produced by energetic particles with very long collision times. Some of the most persistent problems of solar physics, like coronal heating, shock waves, flare energy release, and particle acceleration, are likely to be at least partially related to such p- cesses. Study of the Sun is not regarded here as an end in itself, but as the source of information for more general stellar applications. Our understanding of stellar processes relies heavily, in turn, on our understanding of solar processes. Thus an introduction to what is happening in hot, dilute coronae necessarily starts with the plasma physics of our nearest star.

Modern Theoretical and Observational Cosmology

... ISBN 0-7923-2919-8, July 1994 Volume 190: Infrared Astronomy with Arrays The ... October 1993 Volume 187: Frontiers of Space and Ground-Based Astronomy ...

Modern Theoretical and Observational Cosmology

Proceedings of the second Hellenic Cosmology Meeting, held in the National Observatory of Athens (Penteli, 19-20 April 2001)

Galaxy Formation

In The Frontiers of Space and Ground-based Astronomy, 27th ESLAB Symposium, (eds. W. Wamsteker, M.S. Longair and Y. Kondo), 395.

Galaxy Formation

Written by a well-known astrophysicist, who is also a superbly talented writer, this work deals with the matter and radiation content of the universe, the formation of galaxies, and provides a comprehensive introduction into relativistic astrophysics as needed for the clarification of cosmological ideas.

CO Twenty Five Years of Millimeter Wave Spectroscopy

Proceedings of the 170th Symposium of the International Astronomical Union, ... D., 1994, in Frontiers of Space and Ground-Based Astronomy, ed.

CO  Twenty Five Years of Millimeter Wave Spectroscopy

Interstellar carbon monoxide (CO) was first detected in 1970 with the 36 foot diameter telescope of the National Radio Astronomy Observatory! on Kitt Peak in Southern Arizona. R. W. Wilson, K. B. Jefferts, and A. A. Penzias of Bell Labs reported, "We have found intense 2.6 mm line radiation 2 from nine Galactic sources which we attribute to carbon monoxide." Soon afterward, several other basic molecules were also observed in space. IAU Symposium 170, CO: Twenty Five Years of Millimeter Wave Spectroscopy, was organized to commemorate those discoveries. The Symposium reviewed the accomplishments of a quarter century of research on interstellar molec ular gas, surveyed the current state of millimeter-wave spectroscopy, and gave a glimpse of what the next 25 years might hold. Studies of interstellar CO have revolutionized our understanding of the phases and dynamics of the interstellar medium, the initial and final stages of stellar evolution, the chemistry of dense and diffuse interstellar matter and of the solar system, the structure of the Milky Way galaxy, and the content and structure of other galaxies, some very distant. Spectroscopic studies of CO and other molecules are primary tools for investigating all these topics, which are among the most fundamental and active research areas in astrophysics. New developments in instrumentation, including sev eral powerful new telescopes, continue to keep millimeter and submillimeter wavelength radio astronomy at the forefront of research.

The Oxford Handbook of the History of Modern Cosmology

A selection of 10 most topical stellar problems, in Frontiers of Space and GroundBased Astronomy, ed. Wamsteker, W., Longair, M. S., and Kondo, Y., ...

The Oxford Handbook of the History of Modern Cosmology

Scientific and popular literature on modern cosmology is very extensive; however, scholarly works on the historical development of cosmology are few and scattered. The Oxford Handbook of the History of Modern Cosmology offers a comprehensive and authoritative account of the history of cosmology from the late nineteenth century to the early twenty-first century. It provides historical background to what we know about the universe today, including not only the successes but also the many false starts. Big Bang theory features prominently, but so does the defunct steady state theory. The book starts with a chapter on the pre-Einstein period (1860-1910) and ends with chapters on modern developments such as inflation, dark energy and multiverse hypotheses. The chapters are organized chronologically, with some focusing on theory and others more on observations and technological advances. A few of the chapters discuss more general ideas, relating to larger contexts such as politics, economy, philosophy and world views.

The Physics of Accretion onto Black Holes

... lot harder following the inevitable retirement of Hubble Space Telescope. ... in Frontiers of Space and Ground-Based Astronomy: The Astrophysics of the ...

The Physics of Accretion onto Black Holes

Provides a comprehensive summary on the physical models and current theory of black hole accretion, growth and mergers, in both the supermassive and stellar-mass cases. This title reviews in-depth research on accretion on all scales, from galactic binaries to intermediate mass and supermassive black holes. Possible future directions of accretion are also discussed. The following main themes are covered: a historical perspective; physical models of accretion onto black holes of all masses; black hole fundamental parameters; and accretion, jets and outflows. An overview and outlook on the topic is also presented. This volume summarizes the status of the study of astrophysical black hole research and is aimed at astrophysicists and graduate students working in this field. Originally published in Space Science Reviews, Vol 183/1-4, 2014.

Gravitation and Cosmology

Ap.J., 449, L23. DUNLOP. J.S. 1994. In Frontiers of Space & Ground-based Astronomy, (eds) W. Wamsteker, M.S. Longair & Y. Kondo, p. 395.

Gravitation and Cosmology

The Relativists and Cosmologists in India organized an international conference in Goa, India, in 1987, known as the International Conference on Gravitation and Cosmology (ICGC-87). Encouraged by the success of this conference it was decided to have such a meeting periodically, once in every four years. Accordingly, ICGC- 91 was held at the Physical Research Laboratory (PRL), Ahmedabad, India. The third International Conference on Gravitation and Cosmology, (ICGC-95) was held at the Inter-University centre for Astronomy and Astrophysics, IUCAA, Pune, India during December 13 - 19, 1995. This series of conferences is co-sponsored by the Indian Association for General Relativity and Gravitation (lAGRG). The Conference had 16 plenary lectures and five workshops altogether. There were three plenary lectures per day and two workshops running parallel each day. We were fortunate in getting plenary speakers who are leading experts in their respective fields drawn from all over the world. The conference was attended by about 105 persons from India and 55 from abroad. We thank all the contributors who have taken time to write up their lectures amidst their busy schedule. We regret we could not get the contributions of a few plenary speakers. We would also like to thank the members of Organizing Committees who have worked hard to make this conference a success.

International Ultraviolet Explorer IUE NASA Newsletter

National Aeronautics and Space Administration ... E. G. , Guinan , E. F. , Barnes III , T. G. 1994 , in Frontiers Space and Ground - Based Astronomy , ed .

International Ultraviolet Explorer  IUE  NASA Newsletter


Cosmion 94

1994 , in ” Frontiers of space and ground based astronomy ” , eds . W.Wamsteker et al . , Kluwer Acad . Press 3 Kornilov , V.G. , Lipunov , V.M. 1983 ...

Cosmion 94


Space the Final Frontier

In some instances , however , the difficulties involved in space experiments are less than those associated with ground - based experiments , and this makes ...

Space  the Final Frontier

An unrivaled and illuminating exploration of the positive and negative aspects of space exploration discusses such topics as the value and importance of having humans in space; the likelihood, consequences, and benefits of future space technologies; and human colonization of our solar system. (Science & Mathematics)

New Scientist

Unlike telescopes in space , ground - based telescopes have to view the heavens through the Earth's atmosphere , which distorts the light from distant objects . This explains why stars twinkle . To improve fuzzy images , astronomers ...

New Scientist


Advances in Machine Learning and Data Mining for Astronomy

... as a bold new frontier of astronomical discovery, figured prominently in their recommended priorities space- and ground-based activities [244].

Advances in Machine Learning and Data Mining for Astronomy

Advances in Machine Learning and Data Mining for Astronomy documents numerous successful collaborations among computer scientists, statisticians, and astronomers who illustrate the application of state-of-the-art machine learning and data mining techniques in astronomy. Due to the massive amount and complexity of data in most scientific disciplines