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Aims. We present the first public release of high-quality data products (DR1) from Hi-GAL, the Herschel infrared Galactic Plane Survey. Hi-GAL is the keystone of a suite of continuum Galactic plane surveys from the near-IR to the radio and covers five wavebands at 70, 160, 250, 350 and 500 um, encompassing the peak of the spectral energy distribution of cold dust for 8K<T<50K. This first Hi-GAL data release covers the inner Milky Way in the longitude range 68deg > l > -70deg in a b < 1deg latitude strip.
Methods. Photometric maps have been produced with the ROMAGAL pipeline, which optimally capitalizes on the excellent sensitivity and stability of the bolometer arrays of the Herschel PACS and SPIRE photometric cameras. It delivers images of exquisite quality and dynamical range, absolutely calibrated with Planck and IRAS, and recovers extended emission at all wavelengths and all spatial scales, from the point-spread function to the size of an entire 2deg x 2def “tile” that is the unit observing block of the survey. The compact source catalogues were generated with the CuTEx algorithm, which was specifically developed to optimise source detection and extraction in the extreme conditions of intense and spatially varying background that are found in the Galactic plane in the thermal infrared.
Results. Hi-GAL DR1 images are cirrus noise limited and reach the 1sigma-rms predicted by the Herschel Time Estimators for parallel-mode observations at 60 arcsec/s scanning speed in relatively low cirrus emission regions. Hi-GAL DR1 images will be accessible through a dedicated web-based image cutout service. The DR1 Compact Source Catalogues are delivered as single-band photometric lists containing, in addition to source position, peak, and integrated flux and source sizes, a variety of parameters useful to assess the quality and reliability of the extracted sources. Caveats and hints to help in this assessment are provided. Flux completeness limits in all bands are determined from extensive synthetic source experiments and greatly depend on the specific line of sight along the Galactic plane because the background strongly varies as a function of Galactic longitude.
Hi-GAL DR1 catalogues contain 123210, 308509, 280685, 160972, and 85460 compact sources in the five bands.
Molinari, S.;Schisano, E.;Elia, D.;Pestalozzi, M.;Traficante, A.;Pezzuto, S.;Swinyard, B. M.;Noriega Crespo, A.;Bally, J.;Moore, T. J. T.;Plume, R.;Zavagno, A.;di Giorgio, A. M.;Liu, S. J.;Pilbratt, G. L.;Mottram, J. C.;Russeil, D.;Piazzo, L.;Veneziani, M.;Benedettini, M.;Calzoletti, L.;Faustini, F.;Natoli, P.;Piacentini, F.;Merello, M.;Palmese, A.;Del Grande, R.;Polychroni, D.;Rygl, K. L. J.;Polenta, G.;Barlow, M. J.;Bernard, J. P.;Martin, P. G.;Testi, L.;Ali, B.;André, P.;Beltrán, M. T.;Billot, N.;Carey, S.;Cesaroni, R.;Compiègne, M.;Eden, D.;Fukui, Y.;Garcia Lario, P.;Hoare, M. G.;Huang, M.;Joncas, G.;Lim, T. L.;Lord, S. D.;Martinavarro Armengol, S.;Motte, F.;Paladini, R.;Paradis, D.;Peretto, N.;Robitaille, T.;Schilke, P.;Schneider, N.;Schulz, B.;Sibthorpe, B.;STRAFELLA, Francesco;Thompson, M. A.;Umana, G.;Ward Thompson, D.;Wyrowski, F.
2016-01-01
Abstract
Aims. We present the first public release of high-quality data products (DR1) from Hi-GAL, the Herschel infrared Galactic Plane Survey. Hi-GAL is the keystone of a suite of continuum Galactic plane surveys from the near-IR to the radio and covers five wavebands at 70, 160, 250, 350 and 500 um, encompassing the peak of the spectral energy distribution of cold dust for 8K l > -70deg in a b < 1deg latitude strip.
Methods. Photometric maps have been produced with the ROMAGAL pipeline, which optimally capitalizes on the excellent sensitivity and stability of the bolometer arrays of the Herschel PACS and SPIRE photometric cameras. It delivers images of exquisite quality and dynamical range, absolutely calibrated with Planck and IRAS, and recovers extended emission at all wavelengths and all spatial scales, from the point-spread function to the size of an entire 2deg x 2def “tile” that is the unit observing block of the survey. The compact source catalogues were generated with the CuTEx algorithm, which was specifically developed to optimise source detection and extraction in the extreme conditions of intense and spatially varying background that are found in the Galactic plane in the thermal infrared.
Results. Hi-GAL DR1 images are cirrus noise limited and reach the 1sigma-rms predicted by the Herschel Time Estimators for parallel-mode observations at 60 arcsec/s scanning speed in relatively low cirrus emission regions. Hi-GAL DR1 images will be accessible through a dedicated web-based image cutout service. The DR1 Compact Source Catalogues are delivered as single-band photometric lists containing, in addition to source position, peak, and integrated flux and source sizes, a variety of parameters useful to assess the quality and reliability of the extracted sources. Caveats and hints to help in this assessment are provided. Flux completeness limits in all bands are determined from extensive synthetic source experiments and greatly depend on the specific line of sight along the Galactic plane because the background strongly varies as a function of Galactic longitude.
Hi-GAL DR1 catalogues contain 123210, 308509, 280685, 160972, and 85460 compact sources in the five bands.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11587/408420
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simulazione ASN
Il report seguente simula gli indicatori relativi alla propria produzione scientifica in relazione alle soglie ASN 2023-2025 del proprio SC/SSD. Si ricorda che il superamento dei valori soglia (almeno 2 su 3) è requisito necessario ma non sufficiente al conseguimento dell'abilitazione. La simulazione si basa sui dati IRIS e sugli indicatori bibliometrici alla data indicata e non tiene conto di eventuali periodi di congedo obbligatorio, che in sede di domanda ASN danno diritto a incrementi percentuali dei valori. La simulazione può differire dall'esito di un’eventuale domanda ASN sia per errori di catalogazione e/o dati mancanti in IRIS, sia per la variabilità dei dati bibliometrici nel tempo. Si consideri che Anvur calcola i valori degli indicatori all'ultima data utile per la presentazione delle domande.
La presente simulazione è stata realizzata sulla base delle specifiche raccolte sul tavolo ER del Focus Group IRIS coordinato dall’Università di Modena e Reggio Emilia e delle regole riportate nel DM 589/2018 e allegata Tabella A. Cineca, l’Università di Modena e Reggio Emilia e il Focus Group IRIS non si assumono alcuna responsabilità in merito all’uso che il diretto interessato o terzi faranno della simulazione. Si specifica inoltre che la simulazione contiene calcoli effettuati con dati e algoritmi di pubblico dominio e deve quindi essere considerata come un mero ausilio al calcolo svolgibile manualmente o con strumenti equivalenti.