P04: Galaxy Cluster Mosaic
Observing Goals:
You will observe a Galaxy Cluster and make a Mosaic by taking images at slightly different locations. Useful Background and References:
Observation Planning:
Observation Time
You will be observing HALF a night.
Target Selection
Find a large Galaxy Cluster that is above the horizon for the duration of the the observing night.
Observations
Read the “Creating a Mosaic” text under “Tools for observing”.
Data Analysis:
Data Reduction Basic Steps
Visit the page Data Reduction Cheat Sheet
Make Dark sky flats to remove vignetting.
Remove the sky background by choosing locations with no objects.
Further for this project
Create a Mosaic
Extract the sources from the Mosaic.
Further Analysis for this project
Try to find out if the galaxies are spirals or elipticals.
Results:
Can you answer these questions with your work?
Q1 Can you identify and quantify the stars and galaxies in your Mosaic?
Q2 What is the ratio of spirals to elipticals as a function of the number density of galaxies?