Photometric system

You don't need to be Editor-In-Chief to add or edit content to WikiDoc. You can begin to add to or edit text on this WikiDoc page by clicking on the edit button at the top of this page. Next enter or edit the information that you would like to appear here. Once you are done editing, scroll down and click the Save page button at the bottom of the page.

Please Take Over This Page and Apply to be Editor-In-Chief for this topic: There can be one or more than one Editor-In-Chief. You may also apply to be an Associate Editor-In-Chief of one of the subtopics below. Please mail us [1] to indicate your interest in serving either as an Editor-In-Chief of the entire topic or as an Associate Editor-In-Chief for a subtopic. Please be sure to attach your CV and or biographical sketch.

In astronomy, a Photometric system is a set of well-defined passbands (of filters), with a known sensitivity to incident radiation. The sensitivity usually depends on the optical system, detectors and filters used. For each photometric system a set of primary standard stars is provided.

The first known standardized photometric system is the Johnson-Morgan or UBV photometric system (1953). At present, there are more than 200 photometric systems.

Photometric systems are usually characterized according to the widths of their passbands:

• broadband (passbands wider than 30 nm (the most widely used is Johnson-Morgan UBV system)),
• intermediate band (passbands widths between 10 and 30 nm),
• narrow band (passbands widths less than 10 nm).

Photometric Letters

The letters designate a region of a wavelength of light. Majority of the letters span from near-ultraviolet (NUV) to visible and majority of the near-infrared (NIR).

Note, indigo and cyan are not standard colors^[1]. Orange and yellow fall under visual bands, while violet and purple are under the blue bands.

Filter Letter	Wavelength range	Varient(s)	Description
Ultraviolet
U		u, u', u*	"U" stands for ultraviolet.
Visible
B		b	"B" stands for blue.
V		v, v'	"V" stands for visual.
G		g, g'	"G" stands for green.
R		r, r', R', Rc, Re, Rj	"R" stands for red.
Infrared
I		i, i', Ic, Ie, Ij	"I" stands for infrared.
Z		z, z'
Y		y
J		J', Js
K		K Continuum, K', Ks, Klong, K8, nbK
L		L', nbL'
M		M', nbM
N
Q		Q'

Used Filters

The filters currently being used by other telescopes or organizations^[1].

Units of measurements:

• Å = Ångström
• nm = nanometer
• μm = micron

Name	Filters									Link
2MASS	J = 1.25μm	H = 1.65μm	Ks = 2.15μm							Two Micron All-Sky Survey
CFHTLS (Megacam)	u* = 374nm	g' = 487nm	r' = 625nm	i' = 770nm	z' = 890nm					Canada-France-Hawaii Telescope
Chandra X-ray Observatory	LETG = 0.08-0.2keV	HETG = 0.4-10keV								Chandra X-ray Observatory
CTIO	J = 1.20μm	H = 1.60μm	K = 2.20μm	L = 3.50μm						Cerro Tololo Inter-American Observatory, a division of NOAO
Cousin RI photometry	Rc = 647nm	Ic = 786.5nm								Cousin RI photometry, 1976[1]
DENIS	I = 0.79μm	J = 1.24μm	K = 2.16μm							Deep Near Infrared Survey
Eggen RI photometry	Re = 635nm	Ie = 790nm								Eggen RI photometry, 1965[1]
FIS	N60 = 65.00μm	WIDES-S = 75.00μm	WIDE-L = 145.00μm	N160 = 160.00μm						Far-Infrared Surveyor on board, AKARI space telescope
GALEX	NUV = 1800-2750Å	FUV = 1400-1700Å								GALaxy Evolution Explorer
GOODS (Hubble ACS)	B = 435nm	V = 606nm	i = 775nm	z = 850nm						Advanced Camera for Surveys on the Hubble Space Telescope
HAWC	Band 1 = 53µm	Band 2 = 88µm	Band 3 = 155µm	Band 4 = 215µm						High-resolution Airborne Wideband Camera for SOFIA[1]
HDF	450nm	606nm	814nm							Hubble Deep Field from the Hubble Space Telescope
IRTF NSFCAM	J = 1.26µm	H = 1.62µm	K' = 2.12µm	Ks = 2.15µm	K = 2.21µm	L = 3.50µm	L' = 3.78µm	M' = 4.78µm	M = 4.85µm	NASA Infrared Telescope Facility NSFCAM[1]
ISAAC UTI/VLT	Js = 1.2µm	H = 1.6µm	Ks = 2.2µm	L = 3.78µm	Brα = 4.07µm					Infrared Spectrometer And Array Camera at Very Large Telescope
Johnson system (UBV)	U = 364 nm	B = 442 nm	V = 540 nm							UBV photometric system
OMC	Johnson V-filter = 500-580nm									Optical Monitor Camera[1] on INTEGRAL
Pan-STARRS	uses the Sloan's u,g,r,i,z,y									Panoramic Survey Telescope And Rapid Response System
ProNaOS/SPM	Band 1 = 180-240µm	Band 2 = 240-340µm	Band 3 = 340-540µm	Band 4 = 540-1200µm						PROgramme NAtional d'Observations Submillerètrique/Systéme Photométrique Multibande, balloon-borne experiment[1]
Sloan	u' = 354nm	g' = 475nm	r' = 622nm	i' = 763nm	z' = 905nm	y' = 1005nm				Sloan Digital Sky Survey
SPIRIT III	Band B1 = 4.29μm	Band B2 = 4.35μm	Band A = 8.28μm	Band C = 12.13μm	Band D = 14.65μm	Band E = 21.34μm				Infrared camera on Midcourse Space Experiment[1]
Spitzer IRAC	3.6μm	4.5μm	5.8μm	8.0μm						Infrared Array Camera on Spitzer Space Telescope
Spitzer MIPS	24μm	70μm	160μm							Multiband Imaging Photometer for Spitzer on Spitzer
Stromvil filters	U = 345	P = 374	S = 405	Y = 466	Z = 516	V = 544	S = 656			Stromvil photometry
Strömgren filters	u = 350nm	v = 411nm	b = 467nm	y = 547nm	ß narrow = 485.8nm	ß wide = 485nm				Strömgren photometric system
UKIDSS (WFCAM)	Z = 882nm	Y = 1031nm	J = 1248nm	H = 1631nm	K = 2201nm					UKIRT Infrared Deep Sky Survey
Vilnius photometric system	U = 345nm	P = 374nm	X = 405nm	Y = 466nm	Z = 516nm	V = 544nm	S = 656nm			Vilnius photometric system
VISTA IRC	Z = 0.88μm	Y = 1.02μm	J = 1.25μm	H = 1.65μm	Ks = 2.20μm	NB1.18 = 1.18μm				Visible & Infrared Survey Telescope for Astronomy
XMM-Newton OM	UVW2 = 212nm	UVM2 = 231nm	UVW1 = 291nm	U = 344nm	B = 450nm	V = 543nm				XMM-Newton Optical/UV Monitoring[1]
XEST Survey	UVW2 = 212nm	UVM2 = 231nm	UVW1 = 291nm	U = 344nm	B = 450nm	V = 543nm	J = 1.25μm	H = 1.65μm	Ks = 2.15μm	Survey includes the point source of 2MASS with XMM-Newton OM[1]

References

1. Johnson, H. L.; Morgan, W. W. (1953), Fundamental stellar photometry for standards of spectral type on the revised system of the Yerkes spectral atlas, The Astrophysical Journal, vol. 117, pp. 313-352 [2]
2. The Asiago Database on Photometric Systems
3. Michael S. Bessell (2005), STANDARD PHOTOMETRIC SYSTEMS, Annual Reviews of Astronomy and Astrophysics vol. 43, pp. 293–336
4. Infrared portrait of the nearby massive star-forming region IRAS 09002-4732, Apai, D.; Linz, H.; Henning, Th.; Stecklum, B., 2005

See also

• Photometry

Template:Astronomy-stubca:Sistema fotomètric de:Fotometrisches Systemfr:Système photométrique lb:Fotometrescht System

WikiDoc Help Menu Quick Start.. Get Started Here! How to Login How to Search Pages How to Start a New Page How to Edit a Page Cheat Sheet Editing basics Learning Basic Formatting How to make Links in WikiDoc & to External Sites How to Make Lists How to Ignoring Formatting Adding References or Footnotes to Articles Tracking Changes You Have Made How to Put an Article Into a Category When Multiple Topics Should Go To The Same Page (MI, Acute MI, AMI) Using Redirection Advanced editing How to Make Tables How to Insert Images and Other Media How to Add Video Help:How to Make Columns Web Colors How To Make Templates How to Move Pages Inserting Dynamic Dates and Times Inserting WikiDoc Statistics Editing the Table of Contents Communicating your edits Let others know what you changed: The importance of Edit Summaries Minor Edits Edit Conflicts Help Videos You Can Watch Getting Started Video