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)
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
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
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
Two Micron All-Sky Survey (2MASS)
U
UBV Photometric System
V
Vega System
Very Long Baseline Array (VLBA)
Wide Field Infrared Explorer (WIRE)
Wide-Field Infrared Survey Explorer (WISE)

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