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--- courses:ast403:lyman-break-technique [2026/03/26 07:42] – [The "Dropout" Observation Method] shuvo
+++ courses:ast403:lyman-break-technique [2026/03/26 07:49] (current) – [Advantages and Limitations] shuvo
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-[{{ :courses:ast403:dropout.jpg?600 | Fig 2: Dropout technique.}}]
+[{{ :courses:ast403:dropout.jpg?600 | Fig 2: Dropout technique to find high-redshift galaxies.}}]
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 **Efficiency:** It allows astronomers to survey thousands of galaxies in a single image. By simply comparing brightness across a few filters, they can isolate a reliable list of high-redshift candidates without needing time-consuming spectroscopy for every object.\\
+[{{ :courses:ast403:dropout_photo.png?600 | Fig 3: Dropout technique with HST filters showing photometric data.}}]
 **Targeting:** It helps optimize expensive telescope time. Once astronomers identify a list of dropouts, they can point massive spectrographs (like those on the Keck or VLT telescopes) exactly at those targets to confirm their exact redshift.
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-[{{ :courses:ast403:interloopers.jpg?600 | Fig 2: Color-color diagram for LBGs at z ~ 3 (light grey shaded zone). Black dots are the complete sample of galaxies in the SDSS photometric catalog. Red filled dots represent the sample of LBGs spectroscopically confirmed to be}}]
+[{{ :courses:ast403:interloopers.jpg?600 | Fig 4: Color-color diagram for LBGs at z ~ 3 (light grey shaded zone). Black dots are the complete sample of galaxies in the SDSS photometric catalog. Red filled dots represent the sample of LBGs spectroscopically confirmed to be}}]