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http://hdl.handle.net/20.500.12386/31307
Titolo: | PHANGS-ALMA Data Processing and Pipeline | Autori: | Leroy, Adam K. Hughes, Annie Liu, Daizhong Pety, Jérôme Rosolowsky, Erik Saito, Toshiki Schinnerer, Eva Schruba, Andreas Usero, Antonio Faesi, Christopher M. Herrera, Cinthya N. Chevance, Mélanie Hygate, Alexander P. S. Kepley, Amanda A. Koch, Eric W. Querejeta, Miguel Sliwa, Kazimierz Will, David Wilson, Christine D. Anand, Gagandeep S. Barnes, Ashley BELFIORE, FRANCESCO MICHEL CONCETTO Bešlić, Ivana Bigiel, Frank Blanc, Guillermo A. Bolatto, Alberto D. Boquien, Mèdèric Cao, Yixian Chandar, Rupali Chastenet, Jérémy Chiang, I. -Da Congiu, Enrico Dale, Daniel A. Deger, Sinan den Brok, Jakob S. Eibensteiner, Cosima Emsellem, Eric García-Rodríguez, Axel Glover, Simon C. O. Grasha, Kathryn Groves, Brent Henshaw, Jonathan D. Jiménez Donaire, María J. Kim, Jaeyeon Klessen, Ralf S. Kreckel, Kathryn Kruijssen, J. M. Diederik Larson, Kirsten L. Lee, Janice C. Mayker, Ness McElroy, Rebecca Meidt, Sharon E. Mok, Angus Pan, Hsi-An Puschnig, Johannes Razza, Alessandro Sánchez-Bl'azquez, Patricia Sandstrom, Karin M. Santoro, Francesco Sardone, Amy Scheuermann, Fabian Sun, Jiayi Thilker, David A. Turner, Jordan A. Ubeda, Leonardo Utomo, Dyas Watkins, Elizabeth J. Williams, Thomas G. |
Data pubblicazione: | 2021 | Rivista: | THE ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | Numero: | 255 | Fascicolo: | 1 | Da pagina:: | 19 | Abstract: | We describe the processing of the PHANGS-ALMA survey and present the PHANGS-ALMA pipeline, a public software package that processes calibrated interferometric and total power data into science-ready data products. PHANGS-ALMA is a large, high-resolution survey of CO(2-1) emission from nearby galaxies. The observations combine ALMA's main 12 m array, the 7 m array, and total power observations, and use mosaics of dozens to hundreds of individual pointings. We describe the processing of the u - v data, imaging and deconvolution, linear mosaicking, combining interferometer and total power data, noise estimation, masking, data product creation, and quality assurance. Our pipeline has a general design and can also be applied to Very Large Array and ALMA observations of other spectral lines and continuum emission. We highlight our recipe for deconvolution of complex spectral line observations, which combines multiscale clean, single-scale clean, and automatic mask generation in a way that appears robust and effective. We also emphasize our two-track approach to masking and data product creation. We construct one set of "broadly masked" data products, which have high completeness but significant contamination by noise, and another set of "strictly masked" data products, which have high confidence but exclude faint, low signal-to-noise emission. Our quality assurance tests, supported by simulations, demonstrate that 12 m+7 m deconvolved data recover a total flux that is significantly closer to the total power flux than the 7 m deconvolved data alone. In the appendices, we measure the stability of the ALMA total power calibration in PHANGS-ALMA and test the performance of popular short-spacing correction algorithms. | URI: | http://hdl.handle.net/20.500.12386/31307 | URL: | https://iopscience.iop.org/article/10.3847/1538-4365/abec80 https://api.elsevier.com/content/abstract/scopus_id/85111314090 |
ISSN: | 0067-0049 | DOI: | 10.3847/1538-4365/abec80 | Bibcode ADS: | 2021ApJS..255...19L | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
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