Calibration Of The Rosat Hri Spectral Response
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Calibration Of The Rosat Hri Spectral Response
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-06-16
Calibration Of The Rosat Hri Spectral Response written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-16 with categories.
The ROSAT High Resolution Imager has a limited (2-band) spectral response. This spectral capability can give X-ray hardness ratios on spatial scales of 5 arcseconds. The spectral response of the center of the detector was calibrated before the launch of ROSAT, but the gain decreases with time and also is a function of position on the detector. To complicate matters further, the satellite is 'wobbled', possibly moving a source across several spatial gain states. These difficulties have prevented the spectral response of the ROSAT High Resolution Imager (HRI) from being used for scientific measurements. We have used Bright Earth data and in-flight calibration sources to map the spatial and temporal gain changes, and written software which will allow ROSAT users to generate a calibrated XSPEC (an x ray spectral fitting package) response matrix and hence determine a calibrated hardness ratio. In this report, we describe the calibration procedure and show how to obtain a response matrix. In Section 2 we give an overview of the calibration procedure, in Section 3 we give a summary of HRI spatial and temporal gain variations. Section 4 describes the routines used to determine the gain distribution of a source. In Sections 5 and 6, we describe in detail how, the Bright Earth database and calibration sources are used to derive a corrected response matrix for a given observation. Finally, Section 7 describes how to use the software. Prestwich, Andrea H. and Silverman, John and McDowell, Jonathan and Callanan, Paul and Snowden, Steve Goddard Space Flight Center
Handbook Of X Ray And Gamma Ray Astrophysics
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Author : Cosimo Bambi
language : en
Publisher: Springer Nature
Release Date :
Handbook Of X Ray And Gamma Ray Astrophysics written by Cosimo Bambi and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Astronomical Data Analysis Software And Systems
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Author :
language : en
Publisher:
Release Date : 1995
Astronomical Data Analysis Software And Systems written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Astronomy categories.
Memorie Della Societ Astronomica Italiana
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Author : Società astronomica italiana
language : en
Publisher:
Release Date : 1994
Memorie Della Societ Astronomica Italiana written by Società astronomica italiana and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Astronomy categories.
Broad Band X Ray Spectra Of Cosmic Sources
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Author : COSPAR. Scientific Assembly
language : en
Publisher:
Release Date : 2000
Broad Band X Ray Spectra Of Cosmic Sources written by COSPAR. Scientific Assembly and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Astrophysics categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1994
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Aeronautics categories.
International Aerospace Abstracts
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Author :
language : en
Publisher:
Release Date : 1996
International Aerospace Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Aeronautics categories.
Publications Of The Astronomical Society Of Japan
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Author : Nihon Tenmon Gakkai
language : en
Publisher:
Release Date : 2008
Publications Of The Astronomical Society Of Japan written by Nihon Tenmon Gakkai and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Astronomy categories.
The Wind Interaction Regions Of The Vela Pulsar
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Author : Craig B. Markwardt
language : en
Publisher:
Release Date : 1997
The Wind Interaction Regions Of The Vela Pulsar written by Craig B. Markwardt and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Observatories In Earth Orbit And Beyond
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Author : Y. Kondo
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Observatories In Earth Orbit And Beyond written by Y. Kondo 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.
When I became President of International Astronomical Union Commission 44 for the triennial period 1985-1988, several members of the Organizing Committee and I agreed that it would be a good idea for our Commission to host a conference on observatories in space in view of their increasingly important role in astronomi cal research. IAU Colloquium Number 123 "Observatories in Earth Orbit and Beyond" is the first colloquium sponsored by IAU Com mission 44 on Astronomy from Space, although Commission 44 has co-sponsored numerous colloquia and symposia in the past. The past two decades have seen a flourishing of astronomical observatories in space. Over a dozen orbiting observatories have opened up a new window on the universe, providing hitherto una vailable data in the electromagnetic spectral range from gamma-ray, X-ray, ultraviolet to infrared and radio. This has clearly demon strated the crucial nature of astronomical observations from space. The invited talks of present colloquium consist primarily of reviews of currently operating observatories in space, future observatories that have been approved by sponsoring government or space agencies, the launch systems of U.S.A., E.S.A., U.S.S.R. and Japan, discussions of various orbits and sites (such as the Moon), and alternate approaches in designing space observatories. Several panel discus sions addressed those issues as well as the major unsolved problems of astronomy. Contributed poster papers included descriptions of space observatories that are in planning stage.
