2023MNRAS.523.1967H

Query : 2023MNRAS.523.1967H

2023MNRAS.523.1967H - Mon. Not. R. Astron. Soc., 523, 1967-1993 (2023/August-1)

SKA Science Data Challenge 2: analysis and results.

HARTLEY P., BONALDI A., BRAUN R., ADITYA J.N.H.S., AICARDI S., ALEGRE L., CHAKRABORTY A., CHEN X., CHOUDHURI S., CLARKE A.O., COLES J., COLLINSON J.S., CORNU D., DARRIBA L., DELLI VENERI M., FORBRICH J., FRAGA B., GALAN A., GARRIDO J., GUBANOV F., HAKANSSON H., HARDCASTLE M.J., HENEKA C., HERRANZ D., HESS K.M., JAGANNATH M., JAISWAL S., JUREK R.J., KORBER D., KITAEFF S., KLEINER D., LAO B., LU X., MAZUMDER A., MOLDON J., MONDAL R., NI S., ONNHEIM M., PARRA M., PATRA N., PEEL A., SALOME P., SANCHEZ-EXPOSITO S., SARGENT M., SEMELIN B., SERRA P., SHAW A.K., SHEN A.X., SJOBERG A., SMITH L., SOROKA A., STOLYAROV V., TOLLEY E., TORIBIO M.C., VAN DER HULST J.M., VAFAEI SADR A., VERDES-MONTENEGRO L., WESTMEIER T., YU K., YU L., ZHANG L., ZHANG X., ZHANG Y., ALBERDI A., ASHDOWN M., BOM C.R., BRUGGEN M., CANNON J., CHEN R., COMBES F., CONWAY J., COURBIN F., DING J., FOURESTEY G., FREUNDLICH J., GAO L., GHELLER C., GUO Q., GUSTAVSSON E., JIRSTRAND M., JONES M.G., JOZSA G., KAMPHUIS P., KNEIB J.-P., LINDQVIST M., LIU B., LIU Y., MAO Y., MARCHAL A., MARQUEZ I., MESHCHERYAKOV A., OLBERG M., OOZEER N., PANDEY-POMMIER M., PEI W., PENG B., SABATER J., SORGHO A., STARCK J.L., TASSE C., WANG A., WANG Y., XI H., YANG X., ZHANG H., ZHANG J., ZHAO M. and ZUO S.

Abstract (from CDS):

The Square Kilometre Array Observatory (SKAO) will explore the radio sky to new depths in order to conduct transformational science. SKAO data products made available to astronomers will be correspondingly large and complex, requiring the application of advanced analysis techniques to extract key science findings. To this end, SKAO is conducting a series of Science Data Challenges, each designed to familiarize the scientific community with SKAO data and to drive the development of new analysis techniques. We present the results from Science Data Challenge 2 (SDC2), which invited participants to find and characterize 233 245 neutral hydrogen (H I) sources in a simulated data product representing a 2000 h SKA-Mid spectral line observation from redshifts 0.25-0.5. Through the generous support of eight international supercomputing facilities, participants were able to undertake the Challenge using dedicated computational resources. Alongside the main challenge, 'reproducibility awards' were made in recognition of those pipelines which demonstrated Open Science best practice. The Challenge saw over 100 participants develop a range of new and existing techniques, with results that highlight the strengths of multidisciplinary and collaborative effort. The winning strategy - which combined predictions from two independent machine learning techniques to yield a 20 per cent improvement in overall performance - underscores one of the main Challenge outcomes: that of method complementarity. It is likely that the combination of methods in a so-called ensemble approach will be key to exploiting very large astronomical data sets.

Abstract Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): methods: data analysis - techniques: imaging spectroscopy - surveys - software: simulations - galaxies: statistics - radio lines: galaxies

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 2282 1
2 NAME SCP reg ~ ~           ~ 113 0

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