Physics & Astronomy
x rays
100%
accretion disks
39%
luminosity
31%
spiral galaxies
28%
detectors
23%
coronas
20%
calorimeters
20%
energy
20%
particle telescopes
19%
XMM-Newton telescope
19%
astronomy
17%
International Space Station
17%
observatories
15%
active galactic nuclei
15%
K lines
14%
galaxies
14%
gamma rays
13%
broadband
13%
radii
13%
newton
13%
x ray sources
13%
photons
12%
scintillation counters
12%
iron
11%
continuums
10%
diodes
10%
X Ray Timing Explorer
10%
spectrometers
10%
Crab nebula
9%
counters
9%
inclination
8%
emissivity
8%
astrophysics
8%
orbits
8%
temperature
7%
performance
7%
color
7%
dark matter
7%
high resolution
7%
x ray detectors
7%
time measurement
7%
spectral resolution
7%
spectroscopy
7%
cosmic rays
7%
energy bands
6%
cut-off
6%
pulsars
6%
ionization
5%
imaging spectrometers
5%
Earth & Environmental Sciences
luminosity
69%
accretion
55%
erg
33%
power law
31%
corona
25%
outburst
23%
energy
21%
temperature
13%
transition
12%
spectrometer
12%
iron
12%
emissivity
10%
ionization
9%
crab
9%
detector
9%
radio
7%
scattering
7%
energetics
7%
observatory
7%
gamma radiation
6%
index
6%
tin
6%
spectral analysis
6%
plasma
5%
electron
5%
soft energy
5%
detection
5%
Mathematics
Hard X-ray
38%
X-ray Astronomy
20%
X-ray Spectroscopy
16%
Calorimeter
16%
Soft X-ray
12%
X-ray Imaging
12%
High Resolution
11%
Gamma Rays
10%
NASA
9%
Energy
9%
Calibration
9%
Observatory
8%
Detector
8%
Spectral Resolution
8%
Focal Plane
8%
High Resolution Spectroscopy
7%
CCD Camera
6%
High Energy
5%
Background
5%
Cosmic Rays
5%
Data Center
5%
Range of data
5%
Silicon
5%
Diode
5%