Cosmic Microwave Background Anisotropy Measurement from Python V
We analyze observations of the microwave sky made with the Python experiment in its fifth year of operation at the Amundsen-Scott South Pole Station in Antarctica. After modeling the noise and constructing a map, we extract the cosmic signal from the data. We simultaneously estimate the angular powe...
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American Astronomical Society
2003
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ftcaltechauth:oai:authors.library.caltech.edu:76009 2023-05-15T13:24:26+02:00 Cosmic Microwave Background Anisotropy Measurement from Python V Coble, K. Dodelson, S. Dragovan, M. Ganga, K. Knox, L. Kovac, J. Ratra, B. Souradeep, T. 2003-02-20 application/pdf https://authors.library.caltech.edu/76009/ https://authors.library.caltech.edu/76009/2/pdf https://authors.library.caltech.edu/76009/1/0112506.pdf https://resolver.caltech.edu/CaltechAUTHORS:20170408-144740114 en eng American Astronomical Society https://authors.library.caltech.edu/76009/2/pdf https://authors.library.caltech.edu/76009/1/0112506.pdf Coble, K. and Dodelson, S. and Dragovan, M. and Ganga, K. and Knox, L. and Kovac, J. and Ratra, B. and Souradeep, T. (2003) Cosmic Microwave Background Anisotropy Measurement from Python V. Astrophysical Journal, 584 (2). ISSN 0004-637X. doi:10.1086/345714. https://resolver.caltech.edu/CaltechAUTHORS:20170408-144740114 <https://resolver.caltech.edu/CaltechAUTHORS:20170408-144740114> other Article PeerReviewed 2003 ftcaltechauth https://doi.org/10.1086/345714 2021-11-18T18:41:34Z We analyze observations of the microwave sky made with the Python experiment in its fifth year of operation at the Amundsen-Scott South Pole Station in Antarctica. After modeling the noise and constructing a map, we extract the cosmic signal from the data. We simultaneously estimate the angular power spectrum in eight bands ranging from large (ℓ ~ 40) to small (ℓ ~ 260) angular scales, with power detected in the first six bands. There is a significant rise in the power spectrum from large to smaller (ℓ ~ 200) scales, consistent with that expected from acoustic oscillations in the early universe. We compare this Python V map to a map made from data taken in the third year of Python. Python III observations were made at a frequency of 90 GHz and covered a subset of the region of the sky covered by Python V observations, which were made at 40 GHz. Good agreement is obtained both visually (with a filtered version of the map) and via a likelihood ratio test. Article in Journal/Newspaper Amundsen-Scott Antarc* Antarctica South pole South pole Caltech Authors (California Institute of Technology) Amundsen Scott South Pole Station ENVELOPE(0.000,0.000,-90.000,-90.000) Amundsen-Scott ENVELOPE(0.000,0.000,-90.000,-90.000) Amundsen-Scott South Pole Station ENVELOPE(139.273,139.273,-89.998,-89.998) South Pole The Astrophysical Journal 584 2 585 592 |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
English |
description |
We analyze observations of the microwave sky made with the Python experiment in its fifth year of operation at the Amundsen-Scott South Pole Station in Antarctica. After modeling the noise and constructing a map, we extract the cosmic signal from the data. We simultaneously estimate the angular power spectrum in eight bands ranging from large (ℓ ~ 40) to small (ℓ ~ 260) angular scales, with power detected in the first six bands. There is a significant rise in the power spectrum from large to smaller (ℓ ~ 200) scales, consistent with that expected from acoustic oscillations in the early universe. We compare this Python V map to a map made from data taken in the third year of Python. Python III observations were made at a frequency of 90 GHz and covered a subset of the region of the sky covered by Python V observations, which were made at 40 GHz. Good agreement is obtained both visually (with a filtered version of the map) and via a likelihood ratio test. |
format |
Article in Journal/Newspaper |
author |
Coble, K. Dodelson, S. Dragovan, M. Ganga, K. Knox, L. Kovac, J. Ratra, B. Souradeep, T. |
spellingShingle |
Coble, K. Dodelson, S. Dragovan, M. Ganga, K. Knox, L. Kovac, J. Ratra, B. Souradeep, T. Cosmic Microwave Background Anisotropy Measurement from Python V |
author_facet |
Coble, K. Dodelson, S. Dragovan, M. Ganga, K. Knox, L. Kovac, J. Ratra, B. Souradeep, T. |
author_sort |
Coble, K. |
title |
Cosmic Microwave Background Anisotropy Measurement from Python V |
title_short |
Cosmic Microwave Background Anisotropy Measurement from Python V |
title_full |
Cosmic Microwave Background Anisotropy Measurement from Python V |
title_fullStr |
Cosmic Microwave Background Anisotropy Measurement from Python V |
title_full_unstemmed |
Cosmic Microwave Background Anisotropy Measurement from Python V |
title_sort |
cosmic microwave background anisotropy measurement from python v |
publisher |
American Astronomical Society |
publishDate |
2003 |
url |
https://authors.library.caltech.edu/76009/ https://authors.library.caltech.edu/76009/2/pdf https://authors.library.caltech.edu/76009/1/0112506.pdf https://resolver.caltech.edu/CaltechAUTHORS:20170408-144740114 |
long_lat |
ENVELOPE(0.000,0.000,-90.000,-90.000) ENVELOPE(0.000,0.000,-90.000,-90.000) ENVELOPE(139.273,139.273,-89.998,-89.998) |
geographic |
Amundsen Scott South Pole Station Amundsen-Scott Amundsen-Scott South Pole Station South Pole |
geographic_facet |
Amundsen Scott South Pole Station Amundsen-Scott Amundsen-Scott South Pole Station South Pole |
genre |
Amundsen-Scott Antarc* Antarctica South pole South pole |
genre_facet |
Amundsen-Scott Antarc* Antarctica South pole South pole |
op_relation |
https://authors.library.caltech.edu/76009/2/pdf https://authors.library.caltech.edu/76009/1/0112506.pdf Coble, K. and Dodelson, S. and Dragovan, M. and Ganga, K. and Knox, L. and Kovac, J. and Ratra, B. and Souradeep, T. (2003) Cosmic Microwave Background Anisotropy Measurement from Python V. Astrophysical Journal, 584 (2). ISSN 0004-637X. doi:10.1086/345714. https://resolver.caltech.edu/CaltechAUTHORS:20170408-144740114 <https://resolver.caltech.edu/CaltechAUTHORS:20170408-144740114> |
op_rights |
other |
op_doi |
https://doi.org/10.1086/345714 |
container_title |
The Astrophysical Journal |
container_volume |
584 |
container_issue |
2 |
container_start_page |
585 |
op_container_end_page |
592 |
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1766379647268814848 |