Astrophysics (index)about

passband

(band, filter)
(range of electromagnetic wavelengths that a filter allows)

A passband (or just band) is a specification of the range and strength of wavelengths (and in effect, frequencies) allowed through a filter that cuts off both high and low wavelengths, i.e., a specification of the wavelengths allowed to pass through the filter. In effect, it is a sensitivity function. The term is also used to mean the filter itself. Filter and passband are common terms in optical telescopes (infrared through ultraviolet) while the word band is also used in radio astronomy to refer to the wavelength-sensitivity of a radio receiver and as a general term for a wavelength or frequency range.

The term is used in engineering disciplines such as communications engineering as well as astronomy. In the latter, a photometric system, e.g., the UBV photometric system, is a conventional set of such filter specifications.

The passbands/filters are generally indicated by letter, some being mnemonic for the color, e.g., B for blue, R for red, but the same letter may have differing specifications under different systems. Some common passband letters in astronomy:

The letters Z, Y, J, H, K band, and L are typical of near infrared, and M, N, and Q of mid infrared.


(EMR,color,magnitude,photometry)
http://en.wikipedia.org/wiki/Passband

Referenced by:
AB system
Atacama Cosmology Telescope (ACT)
aperture photometry
Arecibo Observatory (NAIC)
Australian Square Kilometre Array Pathfinder (ASKAP)
astronomical survey
B
band shifting
bandwidth
CCAT
color index
Cherenkov Telescope Array (CTA)
Discovery Channel Telescope (DCT)
DENIS
Deep Lens Survey (DLS)
downconverter
dropout
filter
full width at half maximum (FWHM)
galaxy SED
gas fraction estimation
G band
Green Bank Telescope (GBT)
globular cluster luminosity function (GCLF)
Gemini Observatory
GISMO
Gran Telescopio Canarias (GTC)
GUPPI
Hawaii K-band Galaxy Survey
HERMES
NEWS
Hubble Ultra-Deep Field (HUDF)
I band
imaging Fourier transform spectroscopy (IFTS)
infrared (IR)
JHK photometric system (JHK)
K band
K correction
Large Binocular Telescope (LBT)
light curve
Large Millimeter Telescope (LMT)
luminosity function (LF)
linearly variable filter (LVF)
Lyman-Werner photon
magnitude
mid infrared (MIR)
Mimir
multichroic feedhorn array
NOAO Deep Wide-field Survey (NDWFS)
optical interferometer
Ooty Radio Telescope (ORT)
PAPER
Parkes Observatory
Plateau de Bure Interferometer (PdBI)
photometric system
photometry
photon counting
Psyche
PUPPI
radiometer
R band
reddening
radio frequency interference (RFI)
Sloan Digital Sky Survey (SDSS)
secondary eclipse
sensitivity function (S)
SIMSTACK
spectral correlator
spectroscopy
SPHEREx
Spitzer Space Telescope (SST)
Strömgren photometric system
Subaru Telescope
survey depth
Subaru XMM-Newton Deep Survey (SXDS)
synthetic photometry
telescope
TolTEC
Two Micron All-sky Survey (2MASS)
U
UBV photometric system
V
Vega system
Very Long Baseline Array (VLBA)
Very Small Array (VSA)
Wide Field Infrared Explorer (WIRE)
Wide-field Infrared Survey Explorer (WISE)

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