S-band Polarization All-Sky Survey (S-PASS): survey description and maps
Abstract We present the S-Band Polarization All Sky Survey (S-PASS), a survey of polarized radio emission over the southern sky at Dec. 3). The largest depolarization areas are in the inner Galaxy, associated with the Sagittarius Arm. We have also computed a rotation measure map combining S-PASS wi...
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| Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2019-10, Vol.489 (2), p.2330-2354 |
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| creator | Carretti, E Haverkorn, M Staveley-Smith, L Bernardi, G Gaensler, B M Kesteven, M J Poppi, S Brown, S Crocker, R M Purcell, C Schnitzler, D H F M Sun, X |
| description | Abstract
We present the S-Band Polarization All Sky Survey (S-PASS), a survey of polarized radio emission over the southern sky at Dec. 3). The largest depolarization areas are in the inner Galaxy, associated with the Sagittarius Arm. We have also computed a rotation measure map combining S-PASS with archival data from the Wilkinson Microwave Anisotropy Probe (WMAP) and Planck experiments. A Stokes I map has been generated, with sensitivity limited to the confusion level of 9 mK. |
| doi_str_mv | 10.1093/mnras/stz806 |
| format | Article |
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We present the S-Band Polarization All Sky Survey (S-PASS), a survey of polarized radio emission over the southern sky at Dec. <−1° taken with the Parkes radio telescope at 2.3 GHz. The main aim was to observe at a frequency high enough to avoid strong depolarization at intermediate Galactic latitudes (still present at 1.4 GHz) to study Galactic magnetism, but low enough to retain ample signal-to-noise ratio (S/N) at high latitudes for extragalactic and cosmological science. We developed a new scanning strategy based on long azimuth scans and a corresponding map-making procedure to make recovery of the overall mean signal of Stokes Q and U possible, a long-standing problem with polarization observations. We describe the scanning strategy, map-making procedure and validation tests. The overall mean signal is recovered with a precision better than 0.5 per cent. The maps have a mean sensitivity of 0.81 mK on beam-size scales and show clear polarized signals, typically to within a few degrees of the Galactic plane, with ample S/N everywhere (the typical signal in low-emission regions is 13 mK and 98.6 per cent of pixels have S/N > 3). The largest depolarization areas are in the inner Galaxy, associated with the Sagittarius Arm. We have also computed a rotation measure map combining S-PASS with archival data from the Wilkinson Microwave Anisotropy Probe (WMAP) and Planck experiments. A Stokes I map has been generated, with sensitivity limited to the confusion level of 9 mK.</description><identifier>ISSN: 0035-8711</identifier><identifier>EISSN: 1365-2966</identifier><identifier>DOI: 10.1093/mnras/stz806</identifier><language>eng</language><publisher>Oxford University Press</publisher><ispartof>Monthly notices of the Royal Astronomical Society, 2019-10, Vol.489 (2), p.2330-2354</ispartof><rights>2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society 2019</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c305t-10458ad0429b05902ba35f95df4d2be7138ea3dec5ec9c7fe082b1cadd41342a3</citedby><cites>FETCH-LOGICAL-c305t-10458ad0429b05902ba35f95df4d2be7138ea3dec5ec9c7fe082b1cadd41342a3</cites><orcidid>0000-0002-3382-9558 ; 0000-0002-3973-8403 ; 0000-0002-8057-0294 ; 0000-0002-2036-2426</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,1598,27903,27904</link.rule.ids><linktorsrc>$$Uhttps://dx.doi.org/10.1093/mnras/stz806$$EView_record_in_Oxford_University_Press$$FView_record_in_$$GOxford_University_Press</linktorsrc></links><search><creatorcontrib>Carretti, E</creatorcontrib><creatorcontrib>Haverkorn, M</creatorcontrib><creatorcontrib>Staveley-Smith, L</creatorcontrib><creatorcontrib>Bernardi, G</creatorcontrib><creatorcontrib>Gaensler, B M</creatorcontrib><creatorcontrib>Kesteven, M J</creatorcontrib><creatorcontrib>Poppi, S</creatorcontrib><creatorcontrib>Brown, S</creatorcontrib><creatorcontrib>Crocker, R M</creatorcontrib><creatorcontrib>Purcell, C</creatorcontrib><creatorcontrib>Schnitzler, D H F M</creatorcontrib><creatorcontrib>Sun, X</creatorcontrib><title>S-band Polarization All-Sky Survey (S-PASS): survey description and maps</title><title>Monthly notices of the Royal Astronomical Society</title><description>Abstract
We present the S-Band Polarization All Sky Survey (S-PASS), a survey of polarized radio emission over the southern sky at Dec. <−1° taken with the Parkes radio telescope at 2.3 GHz. The main aim was to observe at a frequency high enough to avoid strong depolarization at intermediate Galactic latitudes (still present at 1.4 GHz) to study Galactic magnetism, but low enough to retain ample signal-to-noise ratio (S/N) at high latitudes for extragalactic and cosmological science. We developed a new scanning strategy based on long azimuth scans and a corresponding map-making procedure to make recovery of the overall mean signal of Stokes Q and U possible, a long-standing problem with polarization observations. We describe the scanning strategy, map-making procedure and validation tests. The overall mean signal is recovered with a precision better than 0.5 per cent. The maps have a mean sensitivity of 0.81 mK on beam-size scales and show clear polarized signals, typically to within a few degrees of the Galactic plane, with ample S/N everywhere (the typical signal in low-emission regions is 13 mK and 98.6 per cent of pixels have S/N > 3). The largest depolarization areas are in the inner Galaxy, associated with the Sagittarius Arm. We have also computed a rotation measure map combining S-PASS with archival data from the Wilkinson Microwave Anisotropy Probe (WMAP) and Planck experiments. A Stokes I map has been generated, with sensitivity limited to the confusion level of 9 mK.</description><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNp9kEtLxDAYRYMoWEd3_oDuVDDOl1fbuCuDOsKAA9F1SZMUqn2RdITOr9eZunZ14XLuXRyErgk8EJBs2XZeh2UY9xkkJygiLBGYyiQ5RREAEzhLCTlHFyF8AgBnNInQWuFSdzbe9o329V6Pdd_FedNg9TXFaue_3RTfKrzNlbp7jMNcWBeMr4cjexi3egiX6KzSTXBXf7lAH89P76s13ry9vK7yDTYMxIgJcJFpC5zKEoQEWmomKilsxS0tXUpY5jSzzghnpEkrBxktidHWcsI41WyB7udf4_sQvKuKwdet9lNBoDhYKI4WitnCL34z4_1u-J_8ARGlX3w</recordid><startdate>20191021</startdate><enddate>20191021</enddate><creator>Carretti, E</creator><creator>Haverkorn, M</creator><creator>Staveley-Smith, L</creator><creator>Bernardi, G</creator><creator>Gaensler, B M</creator><creator>Kesteven, M J</creator><creator>Poppi, S</creator><creator>Brown, S</creator><creator>Crocker, R M</creator><creator>Purcell, C</creator><creator>Schnitzler, D H F M</creator><creator>Sun, X</creator><general>Oxford University Press</general><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0002-3382-9558</orcidid><orcidid>https://orcid.org/0000-0002-3973-8403</orcidid><orcidid>https://orcid.org/0000-0002-8057-0294</orcidid><orcidid>https://orcid.org/0000-0002-2036-2426</orcidid></search><sort><creationdate>20191021</creationdate><title>S-band Polarization All-Sky Survey (S-PASS): survey description and maps</title><author>Carretti, E ; Haverkorn, M ; Staveley-Smith, L ; Bernardi, G ; Gaensler, B M ; Kesteven, M J ; Poppi, S ; Brown, S ; Crocker, R M ; Purcell, C ; Schnitzler, D H F M ; Sun, X</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c305t-10458ad0429b05902ba35f95df4d2be7138ea3dec5ec9c7fe082b1cadd41342a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Carretti, E</creatorcontrib><creatorcontrib>Haverkorn, M</creatorcontrib><creatorcontrib>Staveley-Smith, L</creatorcontrib><creatorcontrib>Bernardi, G</creatorcontrib><creatorcontrib>Gaensler, B M</creatorcontrib><creatorcontrib>Kesteven, M J</creatorcontrib><creatorcontrib>Poppi, S</creatorcontrib><creatorcontrib>Brown, S</creatorcontrib><creatorcontrib>Crocker, R M</creatorcontrib><creatorcontrib>Purcell, C</creatorcontrib><creatorcontrib>Schnitzler, D H F M</creatorcontrib><creatorcontrib>Sun, X</creatorcontrib><collection>CrossRef</collection><jtitle>Monthly notices of the Royal Astronomical Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Carretti, E</au><au>Haverkorn, M</au><au>Staveley-Smith, L</au><au>Bernardi, G</au><au>Gaensler, B M</au><au>Kesteven, M J</au><au>Poppi, S</au><au>Brown, S</au><au>Crocker, R M</au><au>Purcell, C</au><au>Schnitzler, D H F M</au><au>Sun, X</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>S-band Polarization All-Sky Survey (S-PASS): survey description and maps</atitle><jtitle>Monthly notices of the Royal Astronomical Society</jtitle><date>2019-10-21</date><risdate>2019</risdate><volume>489</volume><issue>2</issue><spage>2330</spage><epage>2354</epage><pages>2330-2354</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><abstract>Abstract
We present the S-Band Polarization All Sky Survey (S-PASS), a survey of polarized radio emission over the southern sky at Dec. <−1° taken with the Parkes radio telescope at 2.3 GHz. The main aim was to observe at a frequency high enough to avoid strong depolarization at intermediate Galactic latitudes (still present at 1.4 GHz) to study Galactic magnetism, but low enough to retain ample signal-to-noise ratio (S/N) at high latitudes for extragalactic and cosmological science. We developed a new scanning strategy based on long azimuth scans and a corresponding map-making procedure to make recovery of the overall mean signal of Stokes Q and U possible, a long-standing problem with polarization observations. We describe the scanning strategy, map-making procedure and validation tests. The overall mean signal is recovered with a precision better than 0.5 per cent. The maps have a mean sensitivity of 0.81 mK on beam-size scales and show clear polarized signals, typically to within a few degrees of the Galactic plane, with ample S/N everywhere (the typical signal in low-emission regions is 13 mK and 98.6 per cent of pixels have S/N > 3). The largest depolarization areas are in the inner Galaxy, associated with the Sagittarius Arm. We have also computed a rotation measure map combining S-PASS with archival data from the Wilkinson Microwave Anisotropy Probe (WMAP) and Planck experiments. A Stokes I map has been generated, with sensitivity limited to the confusion level of 9 mK.</abstract><pub>Oxford University Press</pub><doi>10.1093/mnras/stz806</doi><tpages>25</tpages><orcidid>https://orcid.org/0000-0002-3382-9558</orcidid><orcidid>https://orcid.org/0000-0002-3973-8403</orcidid><orcidid>https://orcid.org/0000-0002-8057-0294</orcidid><orcidid>https://orcid.org/0000-0002-2036-2426</orcidid><oa>free_for_read</oa></addata></record> |
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| title | S-band Polarization All-Sky Survey (S-PASS): survey description and maps |
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