V
(V band)
(photometric filter for visible light)
The letter V (or V band) is commonly used to indicate a passband
located within the visible light range (V for visual). The
letter is also often used for a filter for the band (or more
explicitly, a V filter), and to indicate a magnitude of a
signal observed through such a filter, e.g., citing "v = 1.5".
In the conventional UBV photometric system and its offshoots,
the V band is centered around wavelength 551 nm, with a width
of 88 nm (full width at half maximum). Other systems may have different specifications,
sometimes similar.
I've seen "V" explained as "violet", but in the UBV system,
it is outside the violet range.
(EMR,visible light,band,visual,photometry)
Further reading:
http://en.wikipedia.org/wiki/Photometric_system
WaveL | Freq | Photon Energy | | |
551nm | 544THz | 2.3eV | | V |
|
Referenced by pages:
Achernar
AD Leonis (AD Leo)
Algol (Beta Per)
Alpha Centauri
Arcturus
AU Microscopii (AU Mic)
Barnard's Star
Betelgeuse
Canopus
color-color diagram (CCD)
color index
color-period diagram
Epsilon Eridani
Epsilon Indi (ε Indi)
HR 8799
infrared excess (IRX)
Kapteyn's Star
Lacaille 9352
Lalande 21185
Luyten 726-8
magnitude
passband
Procyon
reddening
Rigel
Ross 154
Ross 248
Sirius
SkyMapper Southern Survey (SMSS)
stellar radius determination
Sun
T Tauri
TW Hydrae (TW Hya)
UBV photometric system
Vega
Wolf 359
WR 140
Index