A Caltech Library Service

A Galaxy Cluster Survey Using the Sunyaev Zel’dovich Effect


Edgington, Samantha Faye (2004) A Galaxy Cluster Survey Using the Sunyaev Zel’dovich Effect. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/DVS1-3590.


This thesis describes the design and observations with the Bolocam instrument. Bolocam is a 144-element bolometer array designed to detect the Sunyaev Zel'dovich effect, used at the Caltech Submillimeter Observatory. Bolocam can be configured to observe at 1.1, 1.4, and 2.1 mm. We conducted a galaxy cluster survey at 2.1 mm, where clusters are detected as decrements against the Cosmic Microwave Background. The survey consisted of two blank fields, for a total of one square degree of coverage. We took advantage of the array configuration of the Bolocam focal plane to remove the atmospheric noise from the time stream before mapping the data. The sky noise removal left residual 1/f noise from the atmosphere in the data, and the resulting map sensitivity is limited by this noise. After filtering the maps to detect clusters with a FWHM of 2 arc minutes the RMS of the first map is 148.5 micro-Kelvin, and the second is 77.8 micro-Kelvin. The difference is due to a difference in integration time on the two maps. Bolocam detected 2 4-sigma decrements in the two filtered 1/2 x 1 degree maps. Bolocam also places an upper limit on the CMB angular power spectrum at l = 6000 of delta T < 49 micro-Kelvin.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:bolometers; galaxy cluster; Sunyaev Zel'dovich Effect
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Lange, Andrew E.
Group:Caltech Submillimeter Observatory
Thesis Committee:
  • Lange, Andrew E. (chair)
  • Harrison, Fiona A.
  • Kamionkowski, Marc P.
  • Scoville, Nicholas Zabriskie
Defense Date:28 August 2003
Record Number:CaltechETD:etd-09272003-154928
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3804
Deposited By: Imported from ETD-db
Deposited On:02 Oct 2003
Last Modified:20 Jan 2021 22:52

Thesis Files

PDF - Final Version
See Usage Policy.


Repository Staff Only: item control page