Photometric system
5622659
225078846
2008-07-11T19:49:26Z
VolkovBot
3035831
robot Adding: [[lt:Astrofotometrinė sistema]]
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 [[Photometric standard stars|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 spectrum|visible]] and majority of the near-[[infrared]] (NIR).
Note, [[indigo]] and [[cyan]] are not standard colors<ref>[http://hyperphysics.phy-astr.gsu.edu/Hbase/vision/specol.html Spectral Colors]</ref>. Orange, yellow, and green fall under visual bands, while violet and purple are under the blue bands.
{| class="wikitable" style="text-align:center;border-collapse:collapse;" cellpadding="2"
! Filter Letter
! Wavelength range
! Varient(s)
! Description
|-
! colspan=4| Ultraviolet
|-
| U
|
| u, u', u*
| "U" stands for ultraviolet.
|-
! colspan=4| Visible
|-
| B
|
| b
| "B" stands for blue.
|-
| V
|
| v, v'
| "V" stands for visual.
|-
| G
|
| g, g'
| "G" stands for green (visual).
|-
| R
|
| r, r', R', R<sub>c</sub>, R<sub>e</sub>, R<sub>j</sub>
| "R" stands for red.
|-
! colspan=4| Near-Infrared
|-
| I
|
| i, i', I<sub>c</sub>, I<sub>e</sub>, I<sub>j</sub>
| "I" stands for infrared.
|-
| Z
|
| z, z'
|
|-
| Y
|
| y
|
|-
| J
|
| J', J<sub>s</sub>
|
|-
| K
|
| K Continuum, K', K<sub>s</sub>, K<sub>long</sub>, K<sup>8</sup>, nbK
|
|-
| L
|
| L', nbL'
|
|-
! colspan=4| Mid-Infrared
|-
| M
|
| M', nbM
|
|-
| N
|
|
|
|-
| Q
|
| Q'
|
|-
|}
==Used Filters==
The filters currently being used by other telescopes or organizations<ref>[http://www.astronomy2006.com/files/glass_talk.pdf Classic and New Photometric Systems], IAU, Prague 2006</ref>.
Units of measurements:
* Å = [[Ångström]]
* nm = [[nanometer]]
* μm = [[micrometre|micron]]
{| class="wikitable" style="text-align:center;border-collapse:collapse;" cellpadding="2"
! Name
! colspan=9| Filters
! Link
|-
| 2MASS
| J = 1.25μm
| H = 1.65μm
| K<sub>s</sub> = 2.15μm
| colspan=6|
| [[2MASS|Two Micron All-Sky Survey]]
|-
| CFHTLS (Megacam)
| u<sup>*</sup> = 374nm
| g' = 487nm
| r' = 625nm
| i' = 770nm
| z' = 890nm
| colspan=4|
| [[Canada-France-Hawaii Telescope]]
|-
| Chandra X-ray Observatory
| LETG = 0.08-0.2keV
| HETG = 0.4-10keV
| colspan=7|
| [[Chandra X-ray Observatory]]
|-
| CTIO
| J = 1.20μm
| H = 1.60μm
| K = 2.20μm
| L = 3.50μm
| colspan=5|
| [[Cerro Tololo Inter-American Observatory]], a division of [[NOAO]]
|-
| Cousin RI photometry
| R<sub>c</sub> = 647nm
| I<sub>c</sub> = 786.5nm
| colspan=7|
| Cousin RI photometry, 1976<ref>[http://ulisse.pd.astro.it/Astro/ADPS/Systems/Sys_093/index_093.html ADPS]</ref>
|-
| DENIS
| I = 0.79μm
| J = 1.24μm
| K = 2.16μm
| colspan=6|
|[[Deep Near Infrared Survey]]
|-
| Eggen RI photometry
| R<sub>e</sub> = 635nm
| I<sub>e</sub> = 790nm
| colspan=7|
| Eggen RI photometry, 1965<ref>[http://ulisse.pd.astro.it/Astro/ADPS/Systems/Sys_032/index_032.html ADPS]</ref>
|-
| FIS
| N60 = 65.00μm
| WIDES-S = 75.00μm
| WIDE-L = 145.00μm
| N160 = 160.00μm
| colspan=5|
| Far-Infrared Surveyor on board, [[AKARI]] space telescope
|-
| GALEX
| NUV = 1800-2750Å
| FUV = 1400-1700Å
| colspan=7|
| [[GALEX|GALaxy Evolution Explorer]]
|-
| GOODS (Hubble ACS)
| B = 435nm
| V = 606nm
| i = 775nm
| z = 850nm
| colspan=5|
| [[Advanced Camera for Surveys]] on the Hubble Space Telescope
|-
| HAWC
| Band 1 = 53µm
| Band 2 = 88µm
| Band 3 = 155µm
| Band 4 = 215µm
| colspan=5|
| High-resolution Airborne Wideband Camera for [[Stratospheric Observatory for Infrared Astronomy|SOFIA]]<ref>[http://astro.uchicago.edu/hawc/ HAWC]</ref>
|-
| HDF
| 450nm
| 606nm
| 814nm
| colspan=6|
| [[Hubble Deep Field]] from the [[Hubble Space Telescope]]
|-
| IRTF NSFCAM
| J = 1.26µm
| H = 1.62µm
| K' = 2.12µm
| K<sub>s</sub> = 2.15µm
| K = 2.21µm
| L = 3.50µm
| L' = 3.78µm
| M' = 4.78µm
| M = 4.85µm
| [[NASA Infrared Telescope Facility]] NSFCAM<ref>[http://irtfweb.ifa.hawaii.edu/~nsfcam2/Welcome.html NSFCAM]</ref>
|-
| ISAAC UTI/VLT
| J<sub>s</sub> = 1.2µm
| H = 1.6µm
| K<sub>s</sub> = 2.2µm
| L = 3.78µm
| [[Brackett series|Brα]] = 4.07µm
| colspan=4|
| [[Very_Large_Telescope#Instruments|Infrared Spectrometer And Array Camera at Very Large Telescope]]
|-
| Johnson system (UBV)
| U = 364 nm
| B = 442 nm
| V = 540 nm
| colspan=6|
| [[UBV photometric system]]
|-
| OMC
| Johnson V-filter = 500-580nm
| colspan=8|
| Optical Monitor Camera<ref>[http://heasarc.gsfc.nasa.gov/docs/integral/inthp_about.html About INTEGRAL]</ref> on [[INTEGRAL]]
|-
| Pan-STARRS
| colspan=9| uses the Sloan's u,g,r,i,z,y
| [[Pan-STARRS|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
| colspan=5|
| PROgramme NAtional d'Observations Submillerètrique/Systéme Photométrique Multibande, balloon-borne experiment<ref>[http://www.aanda.org/articles/aa/pdf/2006/08/aa0226-03.pdf Calibration of the PRONAOS/SPM submillimeter photometer, F.Pajot et al. 2006]</ref>
|-
| Sloan
| u' = 354nm
| g' = 475nm
| r' = 622nm
| i' = 763nm
| z' = 905nm
| y' = 1005nm
| colspan=3|
| [[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
| colspan=3|
| Infrared camera on [[Midcourse Space Experiment]]<ref>[http://heasarc.nasa.gov/W3Browse/all/msxpsc.html MSXPSC - Midcourse Space Experiment (MSX) Point Source Catalog, V2.3]</ref>
|-
| Spitzer IRAC
| 3.6μm
| 4.5μm
| 5.8μm
| 8.0μm
| colspan=5|
| Infrared Array Camera on [[Spitzer Space Telescope]]
|-
| Spitzer MIPS
| 24μm
| 70μm
| 160μm
| colspan=6|
| Multiband Imaging Photometer for Spitzer on Spitzer
|-
| Stromvil filters
| U = 345
| P = 374
| S = 405
| Y = 466
| Z = 516
| V = 544
| S = 656
| colspan=2|
| Stromvil photometry
|-
| Strömgren filters
| u = 350nm
| v = 411nm
| b = 467nm
| y = 547nm
| ß narrow = 485.8nm
| ß wide = 485nm
| colspan=3|
| [[Strömgren photometric system]]
|-
| UKIDSS (WFCAM)
| Z = 882nm
| Y = 1031nm
| J = 1248nm
| H = 1631nm
| K = 2201nm
| colspan=4|
| [[UKIRT Infrared Deep Sky Survey]]
|-
| Vilnius photometric system
| U = 345nm
| P = 374nm
| X = 405nm
| Y = 466nm
| Z = 516nm
| V = 544nm
| S = 656nm
| colspan=2|
| [[Vilnius photometric system]]
|-
| VISTA IRC
| Z = 0.88μm
| Y = 1.02μm
| J = 1.25μm
| H = 1.65μm
| K<sub>s</sub> = 2.20μm
| NB1.18 = 1.18μm
| colspan=3|
| [[VISTA (telescope)|Visible & Infrared Survey Telescope for Astronomy]]
|-
| XMM-Newton OM
| UVW2 = 212nm
| UVM2 = 231nm
| UVW1 = 291nm
| U = 344nm
| B = 450nm
| V = 543nm
| colspan=3|
| [[XMM-Newton]] Optical/UV Monitoring<ref>[http://xmm.esac.esa.int/sas/7.1.0/watchout/Evergreen_tips_and_tricks/uvflux.shtml XMM-Newton SAS: Watchout Page]</ref>
|-
| XEST Survey
| UVW2 = 212nm
| UVM2 = 231nm
| UVW1 = 291nm
| U = 344nm
| B = 450nm
| V = 543nm
| J = 1.25μm
| H = 1.65μm
| K<sub>s</sub> = 2.15μm
| Survey includes the point source of [[2MASS]] with [[XMM-Newton|XMM-Newton OM]]<ref>[http://arxiv.org/abs/astro-ph/0611367 The XMM-Newton Optical Monitor Survey of the Taurus Molecular Cloud], M.Audard et al. 2006</ref>
|-
|}
==References==
<references/>
# [[Harold Johnson (astronomer)|Johnson, H. L.]]; [[William Wilson Morgan|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 [http://adsabs.harvard.edu/abs/1953ApJ...117..313J]
# [http://ulisse.pd.astro.it/Astro/ADPS/Systems/index.html The Asiago Database on Photometric Systems]
# Michael S. Bessell (2005), ''STANDARD PHOTOMETRIC SYSTEMS'', Annual Reviews of Astronomy and Astrophysics vol. 43, pp. 293–336
# [http://adsabs.harvard.edu/abs/2005A&A...434..987A Infrared portrait of the nearby massive star-forming region IRAS 09002-4732], Apai, D.; Linz, H.; Henning, Th.; Stecklum, B., 2005
==See also==
* [[Photometry (astronomy)|Photometry]]
{{astronomy-stub}}
[[Category:Photometric systems| ]]
[[ca:Sistema fotomètric]]
[[de:Fotometrisches System]]
[[es:Sistema fotométrico]]
[[fr:Système photométrique]]
[[lb:Fotometrescht System]]
[[lt:Astrofotometrinė sistema]]
[[zh:測光系統]]