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== | {{Infobox astronomical survey | ||
|name = 2MASS | |||
|image = [[Image:2MASS logo.png|2MASS logo]] | |||
|caption = | |||
|organization = [[University of Massachusetts Amherst|UMass]]<br />[[Infrared Processing and Analysis Center|IPAC]] ([[JPL]]{{\}}[[Caltech]])<br />[[NASA]]{{·}} [[National Science Foundation|NSF]] | |||
|alt_names = | |||
|wavelength = [[infrared]] (2 [[Micrometre|<math>\mu</math>m]], 1.25 <math>\mu</math>m, 1.65 <math>\mu</math>m, 2.17 <math>\mu</math>m) | |||
|source = Two 1.3 m [[Equatorial mount|equatorially mounted]] [[Cassegrain reflector]] telescopes ([[Fred Lawrence Whipple Observatory|Whipple Observatory, Arizona, USA]]; Cerro Tololo, [[La Serena, Chile]]) | |||
|goals = [[Galaxy|galaxies]], [[brown dwarf]]s | |||
|products = images<br />[[point source]] [[astronomical catalog|catalogue]]<br />{{nowrap|extended object catalogue}} | |||
|website = [http://www.ipac.caltech.edu/2mass/ About 2MASS]<br />[http://cdsweb.u-strasbg.fr/viz-bin/Cat?II/246 Point sources catalogue]<br />[http://cdsweb.u-strasbg.fr/viz-bin/myqcat4?VII/233 Extended sources catalogue] | |||
}} | |||
[[File:2MASS J17111353+2326333.jpg|thumb|2MASS [[J-band#Infrared_astronomy|J-band]] image, the [[brown dwarf]] [[2MASS J17111353+2326333]] is highlighted.]] | |||
The '''Two Micron All-Sky Survey''' ('''2MASS''') was a survey of the whole sky in three [[infrared]] wavebands around 2 [[micrometre]]s (<math>\mu</math>m): J (1.25 <math>\mu</math>m), H (1.65 <math>\mu</math>m), and K<sub>s</sub> (2.17 <math>\mu</math>m).<ref name="about"/> The observations for the survey were taken between 1997 and 2001, at Mt. Hopkins, [[Arizona]] for the [[Northern Hemisphere]] data and [[Cerro Tololo Inter-American Observatory]], [[Chile]], for the [[southern hemisphere]].<ref name="archive"/> The final data release for 2MASS occurred in 2003. The goals of this survey included: | |||
== | * Detection of [[galaxy|galaxies]] in the "[[Zone of Avoidance]]", a strip of sky obscured in visible light by our own galaxy, the [[Milky Way]]. | ||
* Detection of [[brown dwarf]]s. As of 2003, 2MASS had discovered 173 brown dwarfs, including [[2MASS 0939-2448]], [[2MASS 0415-0935]], [[2M1207]], and [[2MASS J04414489+2301513]].<ref name=Kirkpatrick2003/> | |||
* An extensive survey of low mass [[star]]s, the most common type of star both in our own galaxy and others. | |||
* Cataloging of all detected stars and galaxies. | |||
*Infrared measurements from the 2MASS survey have been particularly effective at unveiling previously undiscovered [[star clusters]].<ref name=fr2007>Froebrich, D.; Scholz, A.; Raftery, C. L. (2007). [http://adsabs.harvard.edu/abs/2007MNRAS.374..399F ''A systematic survey for infrared star clusters with |b| <20° using 2MASS''], MNRAS, 347, 2</ref><ref name=ma2013>Majaess, D. (2013). [http://adsabs.harvard.edu/abs/2013Ap%26SS.344..175M ''Discovering protostars and their host clusters via WISE''], ApSS, 344, 1</ref> | |||
Numerical descriptions of point sources ([[star]]s, [[planet]]s, [[asteroid]]s) and extended sources ([[galaxy|galaxies]], [[nebula]]e) were cataloged by automated computer programs to an average limiting [[apparent magnitude|magnitude]] of about 14. More than 300 [[million]] [[point source]]s and 1 million [[extended source]]s were cataloged. In November 2003, a team of scientists announced the discovery of the [[Canis Major Dwarf Galaxy]], at that time the closest known satellite galaxy to the Milky Way, based on analysis of 2MASS stellar data. | |||
== | The resulting data and images from the survey are currently in the [[public domain]], and may be accessed online for free by anyone.<ref>{{cite web |url=http://www.ipac.caltech.edu/2mass/overview/access.html |title=2MASS Data Access |date=December 20, 2006 |publisher=The Two Micron All Sky Survey at IPAC |accessdate=September 2, 2012}}</ref> There is also a list of 2MASS science publications with links to free pre-publication copies of the papers.<ref>{{cite web |url=http://www.ipac.caltech.edu/2mass/publications/index.html |title=2MASS Science Publications |date= February 1, 2006 |publisher=The Two Micron All Sky Survey at IPAC |accessdate=September 2, 2012}}</ref> | ||
2MASS is sponsored by the [[University of Massachusetts Amherst]], the [[Infrared Processing and Analysis Center]] (IPAC, run by [[Jet Propulsion Laboratory]] (JPL) and [[Caltech]]), [[NASA]], and the [[National Science Foundation]] (NSF). | |||
== | == See also == | ||
* [[:Category:2MASS objects]] | |||
== References == | |||
{{reflist | |||
| refs = | |||
<ref name="about">{{cite web | |||
|date=2006-02-01 | |||
|title=About 2MASS (A Brief Explanation of 2MASS) | |||
|publisher=University of Massachusetts, Infrared Processing and Analysis Center (JPL/ Caltech), NASA, NSF | |||
|url=http://www.ipac.caltech.edu/2mass/overview/about2mass.html | |||
|accessdate=2008-09-21}}</ref> | |||
== | <ref name="archive">{{cite web | ||
|title=Two Micron All Sky Survey (2MASS) | |||
|publisher=NASA/IPAC Infrared Science Archive | |||
|url=http://irsa.ipac.caltech.edu/Missions/2mass.html | |||
|accessdate=2011-10-22}}</ref> | |||
<ref name=Kirkpatrick2003>{{cite journal | |||
|last=Kirkpatrick | |||
|title=2MASS Data Mining and the M, L, and T Dwarf Archives | |||
|journal=IAU Symposium Vol. 211 ("Brown Dwarfs") | |||
|volume=211 |year=2003 | |||
|url=http://spider.ipac.caltech.edu/staff/davy/ARCHIVE/kirkpatrick1.pdf | |||
|arxiv=astro-ph/0207672v1 |bibcode = 2003IAUS..211..189K }}</ref> | |||
}} | |||
== External links == | |||
* [http://www.ipac.caltech.edu/2mass/ 2MASS at IPAC] | |||
* [http://pegasus.astro.umass.edu/ 2MASS at UMass] | |||
* [http://www.ipac.caltech.edu/2mass/gallery/images_misc.html 2MASS Atlas Image Gallery: Miscellaneous Objects] | |||
* [http://www.ipac.caltech.edu/2mass/overview/dwarfs.html Low-Mass Stars and Brown Dwarfs in 2MASS] | |||
[[Category:Astronomical catalogues]] | |||
[[Category:Astronomical surveys]] | |||
[[Category:Photometric systems]] | |||
[[Category:2MASS objects|*]] | |||
Revision as of 00:05, 23 December 2013
Template:Infobox astronomical survey
The Two Micron All-Sky Survey (2MASS) was a survey of the whole sky in three infrared wavebands around 2 micrometres (m): J (1.25 m), H (1.65 m), and Ks (2.17 m).[1] The observations for the survey were taken between 1997 and 2001, at Mt. Hopkins, Arizona for the Northern Hemisphere data and Cerro Tololo Inter-American Observatory, Chile, for the southern hemisphere.[2] The final data release for 2MASS occurred in 2003. The goals of this survey included:
- Detection of galaxies in the "Zone of Avoidance", a strip of sky obscured in visible light by our own galaxy, the Milky Way.
- Detection of brown dwarfs. As of 2003, 2MASS had discovered 173 brown dwarfs, including 2MASS 0939-2448, 2MASS 0415-0935, 2M1207, and 2MASS J04414489+2301513.[3]
- An extensive survey of low mass stars, the most common type of star both in our own galaxy and others.
- Cataloging of all detected stars and galaxies.
- Infrared measurements from the 2MASS survey have been particularly effective at unveiling previously undiscovered star clusters.[4][5]
Numerical descriptions of point sources (stars, planets, asteroids) and extended sources (galaxies, nebulae) were cataloged by automated computer programs to an average limiting magnitude of about 14. More than 300 million point sources and 1 million extended sources were cataloged. In November 2003, a team of scientists announced the discovery of the Canis Major Dwarf Galaxy, at that time the closest known satellite galaxy to the Milky Way, based on analysis of 2MASS stellar data.
The resulting data and images from the survey are currently in the public domain, and may be accessed online for free by anyone.[6] There is also a list of 2MASS science publications with links to free pre-publication copies of the papers.[7]
2MASS is sponsored by the University of Massachusetts Amherst, the Infrared Processing and Analysis Center (IPAC, run by Jet Propulsion Laboratory (JPL) and Caltech), NASA, and the National Science Foundation (NSF).
See also
References
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External links
- 2MASS at IPAC
- 2MASS at UMass
- 2MASS Atlas Image Gallery: Miscellaneous Objects
- Low-Mass Stars and Brown Dwarfs in 2MASS
- ↑ Cite error: Invalid
<ref>tag; no text was provided for refs named "about". - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs named "archive". - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs named "Kirkpatrick2003". - ↑ Froebrich, D.; Scholz, A.; Raftery, C. L. (2007). A systematic survey for infrared star clusters with |b| <20° using 2MASS, MNRAS, 347, 2
- ↑ Majaess, D. (2013). Discovering protostars and their host clusters via WISE, ApSS, 344, 1
- ↑ Template:Cite web
- ↑ Template:Cite web