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]]