Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/28605
Titolo: | S-band Polarization All-Sky Survey (S-PASS): survey description and maps | Autori: | CARRETTI, ETTORE Haverkorn, M. Staveley-Smith, L. BERNARDI, GIANNI Gaensler, B. M. Kesteven, M. J. POPPI, Sergio Brown, S. Crocker, R. M. Purcell, C. Schnitzeler, D. H. F. M. Sun, X. |
Data pubblicazione: | 2019 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 489 | Fascicolo: | 2 | Da pagina:: | 2330 | 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. | URI: | http://hdl.handle.net/20.500.12386/28605 | URL: | https://academic.oup.com/mnras/article/489/2/2330/5561417 | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stz806 | Bibcode ADS: | 2019MNRAS.489.2330C | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
---|---|---|---|---|
stz806_comp_sejda.pdf | PDF editoriale | 1.46 MB | Adobe PDF | Visualizza/apri |
Page view(s)
59
controllato il 26-apr-2024
Download(s)
22
controllato il 26-apr-2024
Google ScholarTM
Check
Altmetric
Altmetric
Tutti i documenti in DSpace sono pubblicati ad Accesso Aperto, salvo diversa indicazione per alcuni documenti specifici.