Astrophysics (index)about

X-ray

(electromagnetic radiation, wavelength .01 to 10 nanometers)

An X-ray is electromagnetic radiation (EMR) with wavelengths in the range of 0.01nm-10nm. They lie between ultraviolet and gamma rays.

Lower energy/frequency X-rays, toward the ultraviolet end, are termed soft and higher energy/frequency, toward the gamma rays end are termed hard. The intervening line is about 0.1-to-0.2nm or 5-to-10keV.

The phrase cosmic X-ray survey has been used for surveys of X-ray sources at cosmological distances, e.g., distant active galactic nuclei.


(EMR,spectrum,band)
http://en.wikipedia.org/wiki/Xray
WaveLFreqPhoton
Energy
  
0.01nm30EHz124keVbeginX-ray
10nm30PHz124eVendX-ray

Referenced by:
ACIS
active galaxy
AGILE
active galactic nucleus (AGN)
ALEXIS
ASTRO-H
Athena
atmospheric escape
anomalous X-ray pulsar (AXP)
binary star
Chandra Deep Field North (CDFN)
Chandra Deep Field South (CDFS)
Chandra X-ray Observatory (CXO)
Compton scattering
Cosmic Evolution Survey (COSMOS)
cosmic X-ray background (CXB)
diffuse emission
DQ Tau
Extended Chandra Deep Field-South Survey (ECDFS)
electromagnetic spectrum
electromagnetic radiation (EMR)
eROSITA
EXOSAT
filter
galaxy cluster (CL)
gamma rays
GRANAT
grating
HEAO-1
HEAO-2
HEASARC
HI supershell
intracluster medium (ICM)
intergalactic medium (IGM)
INTEGRAL
ionosphere
Japan Aerospace Exploration Agency (JAXA)
K-line
Kramers opacity law
Lynx
Massive Cluster Survey (MACS)
magnetar
Mars 2020
MAXI
Mars Exploration Rover (MER)
Mars Science Laboratory (MSL)
millisecond pulsar (MSP)
MIT X-ray Burst Source Catalog (MXB)
nova
NuSTAR
obscured fraction-luminosity relation
OSO 7
photodissociation
pre-main-sequence star (PMS)
pulsar (PSR)
Rosat Bright Survey (RBS)
Rho Ophiuchi Cloud Complex
Rosat Hard Survey (RHS)
ROSAT
Rosetta
radio source (RS)
RXTE
Spitzer Extragalactic Representative Volume Survey (SERVS)
soft gamma repeater (SGR)
slew survey
Solar Maximum Mission (SMM)
spectrograph
spectrometer
spectroscope
SS 433
STAR-X
Suzaku
Swift
Subaru XMM-Newton Deep Survey (SXDS)
Taurus-Auriga Complex
tidal disruption event (TDE)
Thomson optical depth
3C 295
3C 9
transient
Uhuru
ultraviolet (UV)
ultraluminous X-ray source (ULX)
wavelength
Wolf-Rayet star
Wolter telescope
XBONG
XEUV
X-ray luminosity function (XLF)
XMM-Newton
Yohkoh

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