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-like 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)
astronomical survey
B
band shifting
bandwidth
CCAT
color index
Cherenkov Telescope Array (CTA)
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)
Lyman-Werner photon
mid infrared (MIR)
Mimir
NOAO Deep Wide-field Survey (NDWFS)
optical interferometer
Ooty Radio Telescope (ORT)
Owens Valley Radio Observatory (OVRO)
PAPER
Plateau de Bure Interferometer (PdBI)
photometric system
photometry
photon counting
Psyche
PUPPI
R band
reddening
radio frequency interference (RFI)
Sloan Digital Sky Survey (SDSS)
secondary eclipse
sensitivity function (S)
SIMSTACK
spectroscopy
SPHEREx
Spitzer Space Telescope (SST)
Strömgren photometric system
Subaru Telescope
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)

index