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The DESI Survey Validation: Results from Visual Inspection of Bright Galaxies, Luminous Red Galaxies, and Emission Line Galaxies

Fuente: arXiv

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Detalles Bibliográficos
Autores principales:	Lan, Ting-Wen, Tojeiro, R., Armengaud, E., Prochaska, J. Xavier, Davis, T. M., Alexander, David M., Raichoor, A., Zhou, Rongpu, Yeche, Christophe, Balland, C., BenZvi, S., Berti, A., Canning, R., Carr, A., Chittenden, H., Cole, S., Cousinou, M. -C., Dawson, K., Dey, Biprateep, Douglass, K., Edge, A., Escoffier, S., Glanville, A., Gontcho, S. Gontcho A, Guy, J., Hahn, C., Howlett, C., Hwang, Ho Seong, Jiang, L., Kovacs, A., Mezcua, M., Moore, S., Nadathur, S., Oh, M., Parkinson, D., Rocher, A., Ross, A. J., Ruhlmann-Kleider, V., Sabiu, C. G., Said, K., Saulder, C., Sierra-Porta, D., Weiner, B., Yu, J., Zarrouk, P., Zhang, Y., Zou, H., Ahlen, S., Bailey, S., Brooks, D., Cooper, A. P., de la Macorra, A., Dey, A., Dhungana, G., Doel, P., Eftekharzadeh, S., Fanning, K., Font-Ribera, A., Garrison, L., Gaztanaga, E., Kehoe, R., Kisner, T., Kremin, A., Landriau, M., Guillou, L. Le, Levi, Michael E., Magneville, C., Meisner, Aaron M., Miquel, R., Moustakas, J., Myers, Adam D., Newman, Jeffrey A., Nie, J. D., Palanque-Delabrouille, N., Percival, W. J., Poppett, C., Prada, F., Schubnell, M., Tarle, Gregory, Weaver, B. A., Zhang, K., Zhou, Zhimin
Formato:	Preprint
Publicado:	2022
Materias:	Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies
Acceso en línea:	Acceder al recurso
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

_version_	1866912063272517632
author	Lan, Ting-Wen Tojeiro, R. Armengaud, E. Prochaska, J. Xavier Davis, T. M. Alexander, David M. Raichoor, A. Zhou, Rongpu Yeche, Christophe Balland, C. BenZvi, S. Berti, A. Canning, R. Carr, A. Chittenden, H. Cole, S. Cousinou, M. -C. Dawson, K. Dey, Biprateep Douglass, K. Edge, A. Escoffier, S. Glanville, A. Gontcho, S. Gontcho A Guy, J. Hahn, C. Howlett, C. Hwang, Ho Seong Jiang, L. Kovacs, A. Mezcua, M. Moore, S. Nadathur, S. Oh, M. Parkinson, D. Rocher, A. Ross, A. J. Ruhlmann-Kleider, V. Sabiu, C. G. Said, K. Saulder, C. Sierra-Porta, D. Weiner, B. Yu, J. Zarrouk, P. Zhang, Y. Zou, H. Ahlen, S. Bailey, S. Brooks, D. Cooper, A. P. de la Macorra, A. Dey, A. Dhungana, G. Doel, P. Eftekharzadeh, S. Fanning, K. Font-Ribera, A. Garrison, L. Gaztanaga, E. Kehoe, R. Kisner, T. Kremin, A. Landriau, M. Guillou, L. Le Levi, Michael E. Magneville, C. Meisner, Aaron M. Miquel, R. Moustakas, J. Myers, Adam D. Newman, Jeffrey A. Nie, J. D. Palanque-Delabrouille, N. Percival, W. J. Poppett, C. Prada, F. Schubnell, M. Tarle, Gregory Weaver, B. A. Zhang, K. Zhou, Zhimin
author_facet	Lan, Ting-Wen Tojeiro, R. Armengaud, E. Prochaska, J. Xavier Davis, T. M. Alexander, David M. Raichoor, A. Zhou, Rongpu Yeche, Christophe Balland, C. BenZvi, S. Berti, A. Canning, R. Carr, A. Chittenden, H. Cole, S. Cousinou, M. -C. Dawson, K. Dey, Biprateep Douglass, K. Edge, A. Escoffier, S. Glanville, A. Gontcho, S. Gontcho A Guy, J. Hahn, C. Howlett, C. Hwang, Ho Seong Jiang, L. Kovacs, A. Mezcua, M. Moore, S. Nadathur, S. Oh, M. Parkinson, D. Rocher, A. Ross, A. J. Ruhlmann-Kleider, V. Sabiu, C. G. Said, K. Saulder, C. Sierra-Porta, D. Weiner, B. Yu, J. Zarrouk, P. Zhang, Y. Zou, H. Ahlen, S. Bailey, S. Brooks, D. Cooper, A. P. de la Macorra, A. Dey, A. Dhungana, G. Doel, P. Eftekharzadeh, S. Fanning, K. Font-Ribera, A. Garrison, L. Gaztanaga, E. Kehoe, R. Kisner, T. Kremin, A. Landriau, M. Guillou, L. Le Levi, Michael E. Magneville, C. Meisner, Aaron M. Miquel, R. Moustakas, J. Myers, Adam D. Newman, Jeffrey A. Nie, J. D. Palanque-Delabrouille, N. Percival, W. J. Poppett, C. Prada, F. Schubnell, M. Tarle, Gregory Weaver, B. A. Zhang, K. Zhou, Zhimin
contents	The Dark Energy Spectroscopic Instrument (DESI) Survey has obtained a set of spectroscopic measurements of galaxies to validate the final survey design and target selections. To assist in these tasks, we visually inspect (VI) DESI spectra of approximately 2,500 bright galaxies, 3,500 luminous red galaxies (LRGs), and 10,000 emission line galaxies (ELGs), to obtain robust redshift identifications. We then utilize the VI redshift information to characterize the performance of the DESI operation. Based on the VI catalogs, our results show that the final survey design yields samples of bright galaxies, LRGs, and ELGs with purity greater than $99\%$. Moreover, we demonstrate that the precision of the redshift measurements is approximately 10 km/s for bright galaxies and ELGs and approximately 40 km/s for LRGs. The average redshift accuracy is within 10 km/s for the three types of galaxies. The VI process also helps improve the quality of the DESI data by identifying spurious spectral features introduced by the pipeline. Finally, we show examples of unexpected real astronomical objects, such as Ly$α$ emitters and strong lensing candidates, identified by VI. These results demonstrate the importance and utility of visually inspecting data from incoming and upcoming surveys, especially during their early operation phases.
format	Preprint
id	arxiv_https___arxiv_org_abs_2208_08516
institution	arXiv
publishDate	2022
record_format	arxiv
spellingShingle	The DESI Survey Validation: Results from Visual Inspection of Bright Galaxies, Luminous Red Galaxies, and Emission Line Galaxies Lan, Ting-Wen Tojeiro, R. Armengaud, E. Prochaska, J. Xavier Davis, T. M. Alexander, David M. Raichoor, A. Zhou, Rongpu Yeche, Christophe Balland, C. BenZvi, S. Berti, A. Canning, R. Carr, A. Chittenden, H. Cole, S. Cousinou, M. -C. Dawson, K. Dey, Biprateep Douglass, K. Edge, A. Escoffier, S. Glanville, A. Gontcho, S. Gontcho A Guy, J. Hahn, C. Howlett, C. Hwang, Ho Seong Jiang, L. Kovacs, A. Mezcua, M. Moore, S. Nadathur, S. Oh, M. Parkinson, D. Rocher, A. Ross, A. J. Ruhlmann-Kleider, V. Sabiu, C. G. Said, K. Saulder, C. Sierra-Porta, D. Weiner, B. Yu, J. Zarrouk, P. Zhang, Y. Zou, H. Ahlen, S. Bailey, S. Brooks, D. Cooper, A. P. de la Macorra, A. Dey, A. Dhungana, G. Doel, P. Eftekharzadeh, S. Fanning, K. Font-Ribera, A. Garrison, L. Gaztanaga, E. Kehoe, R. Kisner, T. Kremin, A. Landriau, M. Guillou, L. Le Levi, Michael E. Magneville, C. Meisner, Aaron M. Miquel, R. Moustakas, J. Myers, Adam D. Newman, Jeffrey A. Nie, J. D. Palanque-Delabrouille, N. Percival, W. J. Poppett, C. Prada, F. Schubnell, M. Tarle, Gregory Weaver, B. A. Zhang, K. Zhou, Zhimin Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies The Dark Energy Spectroscopic Instrument (DESI) Survey has obtained a set of spectroscopic measurements of galaxies to validate the final survey design and target selections. To assist in these tasks, we visually inspect (VI) DESI spectra of approximately 2,500 bright galaxies, 3,500 luminous red galaxies (LRGs), and 10,000 emission line galaxies (ELGs), to obtain robust redshift identifications. We then utilize the VI redshift information to characterize the performance of the DESI operation. Based on the VI catalogs, our results show that the final survey design yields samples of bright galaxies, LRGs, and ELGs with purity greater than $99\%$. Moreover, we demonstrate that the precision of the redshift measurements is approximately 10 km/s for bright galaxies and ELGs and approximately 40 km/s for LRGs. The average redshift accuracy is within 10 km/s for the three types of galaxies. The VI process also helps improve the quality of the DESI data by identifying spurious spectral features introduced by the pipeline. Finally, we show examples of unexpected real astronomical objects, such as Ly$α$ emitters and strong lensing candidates, identified by VI. These results demonstrate the importance and utility of visually inspecting data from incoming and upcoming surveys, especially during their early operation phases.
title	The DESI Survey Validation: Results from Visual Inspection of Bright Galaxies, Luminous Red Galaxies, and Emission Line Galaxies
topic	Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies
url	https://arxiv.org/abs/2208.08516