Questions (and Answers) About Cosmic High-Energy (X-ray &
How are the X-ray and gamma-ray energy bands
What are the energy bands for the other various types
of electromagnetic radiation?
How many individual
X-ray sources are known currently?
How has the number grown since the first cosmic X-ray astronomical observations
How do the sensitivity & angular
resolution of current X-ray telescopes compare with previous ones?
What kinds of cosmic objects
are X-ray emitters?
What are the brightest objects in the X-ray
How many individual gamma-ray sources are
How has their number grown since the first gamma-ray astronomical observations
How do the numbers of
catalogued X-ray & gamma-ray sources compare with other energies?
How much X-ray and gamma-ray data are in
the HEASARC's archive?
How much X-ray and gamma-ray data are
being archived by the HEASARC every day? How much X-ray and gamma-ray data
are downloaded by HEASARC users every day?
Please send information concerning
dates/deadlines not currently included on this page and/or corrections to:
Stephen.A.Drake @ nasa.gov
Web page maintainer: Stephen A. Drake
HEASARC Home |
Last modified: Wednesday, 16-May-2012 14:56:07 EDT
HEASARC support for unencrypted FTP access ended on September 20, 2019. Please see this notice for details.