Cluster Lensing and Supernova survey with Hubble

Cluster Lensing And Supernova survey with Hubble
Alternative namesCLASH
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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) was a program on the Hubble Space Telescope to observe 25 massive galaxy clusters. CLASH was one of three programs selected (along with CANDELS and PHAT) in the first class of Hubble multi-cycle treasury programs, which were designed to tackle large questions unanswerable through normal observations.[1] Observations for CLASH were conducted between November 2010 and July 2013.[2] CLASH was led by principal investigator Marc Postman, and had a science team of over 40 researchers.[2]

Primary observations for CLASH were conducted on the Hubble Space Telescope with the Advanced Camera for Surveys (ACS) and Wide Field Camera 3 (WFC3). Images were taken in 16 filters, which were selected to maximize the ability to detect distant galaxies behind each cluster.[3] Twenty of the observed clusters were selected due to their relaxed morphology in X-ray observations, while the other five were chosen due to their strength as gravitational lenses.

  1. ^ "Science Year in Review: Hubble 2011" (PDF). HubbleSite. Space Telescope Science Institute. Retrieved 3 February 2019.
  2. ^ a b Postman, Marc. "CLASH: An Innovative Survey to Place New Constraints on the Fundamental Components of the Cosmos using the Hubble Space Telescope". Space Telescope Science Institute. Retrieved 3 February 2019.
  3. ^ Postman, Marc; Coe, Dan; Benítez, Narciso; Bradley, Larry; Broadhurst, Tom; Donahue, Megan; Ford, Holland; Graur, Or; Graves, Genevieve; Jouvel, Stephanie; Koekemoer, Anton; Lemze, Doron; Medezinski, Elinor; Molino, Alberto; Moustakas, Leonidas; Ogaz, Sara; Riess, Adam; Rodney, Steve; Rosati, Piero; Umetsu, Keiichi; Zheng, Wei; Zitrin, Adi; Bartelmann, Matthias; Bouwens, Rychard; Czakon, Nicole; Golwala, Sunil; Host, Ole; Infante, Leopoldo; Jha, Saurabh; Jimenez-Teja, Yolanda; Kelson, Daniel; Lahav, Ofer; Lazkoz, Ruth; Maoz, Dani; McCully, Curtis; Melchior, Peter; Meneghetti, Massimo; Merten, Julian; Moustakas, John; Nonino, Mario; Patel, Brandon; Regös, Enikö; Sayers, Jack; Seitz, Stella; Van der Wel, Arjen (1 April 2012). "The Cluster Lensing and Supernova Survey with Hubble: An Overview". The Astrophysical Journal Supplement Series. 199 (2): 25. arXiv:1106.3328. Bibcode:2012ApJS..199...25P. doi:10.1088/0067-0049/199/2/25. S2CID 34368160.