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Cluster Lensing and Supernova survey with Hubble

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This image from the NASA/ESA Hubble Space Telescope shows the galaxy cluster MACS J1206. This is one of 25 clusters being studied as part of the CLASH (Cluster Lensing and Supernova survey with Hubble) programme, a major project to build a library of scientific data on lensing clusters.

The Cluster Lensing And Supernova survey with Hubble (CLASH) is a multi-wavelength census of 25 massive galaxy clusters with Advanced Camera for Surveys (ACS) and Wide Field Camera 3 (WFC3) instruments of Hubble Space Telescope over a 3.5 year period (2010 - 2013).

The gravity of these massive clusters is powerful enough to visibly bend the path of light, somewhat like a magnifying glass and are thus useful tools for studying very distant objects. They also contribute to a range of topics in cosmology, as the precise nature of the lensed images encapsulates information about the properties of spacetime and the expansion of the cosmos.

History

As of November 2012, the CLASH has surveyed 20 clusters out of the 25. One of the galaxy clusters, MACS J0647+7015 was found to have gravitationally lensed the most distant galaxy (MACS0647-JD) then ever imaged, in 2012.[1][2]

In 2013, one study utilizing CLASH data found that RX J1347.5-1145 had intense gravitational bending of light such that 8 images of the same object were detected.[3] (See Gravitational lensing)

Clusters under observation

List of clusters is:[4]

Galaxy cluster Notes
Abell 209
(ACO 209)
Abell 383
(ACO 383)
MACS0329.7-0211
MACS0429.6-0253
MACS0744.9+3927
Abell 611
(ACO 611)
MACS1115.9+0129
Abell 1423
(ACO 1423)
MACS1206.2-0847
CLJ1226.9+3332
(ClG J1226.9+3332)
MACS1311.0-0310
RX J1347.5-1145 one of the most X-ray luminous and most massive cluster known, with an X-ray luminosity in excess of 10^45^erg/s.[5]
MACS1423.8+2404
RXJ1532.9+3021
MACS1720.3+3536
Abell 2261
(ACO 2261)
MACS1931.8-2635
RXJ2129.7+0005
MS2137-2353
RXJ2248.7-4431
(Abell 1063S /
ACO 1063S)
MACS0416.1-2403
MACS0647.8+7015
MACS0717.5+3745
MACS1149.6+2223
MACS2129.4-0741

References

  1. ^ Hubble helps find candidate for most distant object in the Universe yet observed
  2. ^ Scientific Objectives of CLASH
  3. ^ F. Köhlinger and R.W. Schmidt - Strong lensing in RX J1347.5-1145 revisited (2013)
  4. ^ THE CLUSTER LENSING AND SUPERNOVA SURVEY WITH HUBBLE: AN OVERVIEW
  5. ^ Magellan Spectroscopy of the Galaxy Cluster RX J1347.5-1145: Redshift Estimates for the Gravitationally Lensed Arcs
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