Cluster Lensing and Supernova survey with Hubble

The Cluster Lensing And Supernova survey with Hubble (CLASH) was a program on the <a href="/facts/Hubble_Space_Telescope/NQeIf0vw">Hubble Space Telescope</a> to observe 25 massive <a href="/facts/Galaxy_cluster/BhIEgbx8">galaxy clusters</a>. CLASH was one of three programs selected (along with <a href="/facts/Cosmic_Assembly_Near-infrared_Deep_Extragalactic_Legacy_Survey/gV6MEXMh">CANDELS</a> and <a href="/facts/Panchromatic_Hubble_Andromeda_Treasury/nSmYBhz8">PHAT</a>) in the first class of Hubble multi-cycle treasury programs, which were designed to tackle large questions unanswerable through normal observations. Observations for CLASH were conducted between November 2010 and July 2013. CLASH was led by principal investigator <a href="/facts/Marc_Postman/beVrzPLV">Marc Postman</a>, and had a science team of over 40 researchers.
Primary observations for CLASH were conducted on the Hubble Space Telescope with the <a href="/facts/Advanced_Camera_for_Surveys/bGSJsjyK">Advanced Camera for Surveys</a> (ACS) and <a href="/facts/Wide_Field_Camera_3/XPTKFGBx">Wide Field Camera 3</a> (WFC3). Images were taken in 16 filters, which were selected to maximize the ability to detect distant galaxies behind each cluster. 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.

Cluster Lensing and Supernova survey with Hubble open-in-new

Cluster Lensing and Supernova survey with Hubble