2023MNRAS.523.4413R

Query : 2023MNRAS.523.4413R

2023MNRAS.523.4413R - Mon. Not. R. Astron. Soc., 523, 4413-4430 (2023/August-2)

The impact of human expert visual inspection on the discovery of strong gravitational lenses.

ROJAS K., COLLETT T.E., BALLARD D., MAGEE M.R., BIRRER S., BUCKLEY-GEER E., CHAN J.H.H., CLEMENT B., DIEGO J.M., GENTILE F., GONZALEZ J., JOSEPH R., MASTACHE J., SCHULDT S., TORTORA C., VERDUGO T., VERMA A., DAYLAN T., MILLON M., JACKSON N., DYE S., MELO A., MAHLER G., OGANDO R.L.C., COURBIN F., FRITZ A., HERLE A., ACEVEDO BARROSO J.A., CANAMERAS R., CORNEN C., DHANASINGHAM B., GLAZEBROOK K., MARTINEZ M.N., RYCZANOWSKI D., SAVARY E., GOIS-SILVA F., URENA-LOPEZ L.A., WIESNER M.P., WILDE J., CALCADA G.V., CABANAC R., PAN Y., SIERRA I., DESPALI G., CAVALCANTE-GOMES M.V., MACMILLAN C., MARESCA J., GRUDSKAIA A., O'DONNELL J.H., PAIC E., NIEMIEC A., DE LA BELLA L.F., BROMLEY J., WILLIAMS D.M., MORE A. and LEVINE B.C.

Abstract (from CDS):

We investigate the ability of human 'expert' classifiers to identify strong gravitational lens candidates in Dark Energy Survey like imaging. We recruited a total of 55 people that completed more than 25 per cent of the project. During the classification task, we present to the participants 1489 images. The sample contains a variety of data including lens simulations, real lenses, non-lens examples, and unlabelled data. We find that experts are extremely good at finding bright, well-resolved Einstein rings, while arcs with g-band signal to noise less than ∼25 or Einstein radii less than ∼1.2 times the seeing are rarely recovered. Very few non-lenses are scored highly. There is substantial variation in the performance of individual classifiers, but they do not appear to depend on the classifier's experience, confidence or academic position. These variations can be mitigated with a team of 6 or more independent classifiers. Our results give confidence that humans are a reliable pruning step for lens candidates, providing pure and quantifiably complete samples for follow-up studies.

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

Journal keyword(s): gravitational lensing: strong

Simbad objects: 11

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Number of rows : 11
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 SLACS SDSS J0008-0004 gLS 00 08 02.953 -00 04 08.21           ~ 21 0
2 SLACS SDSS J0029-0055 gLS 00 29 07.7777644104 -00 55 50.581964100           ~ 31 0
3 SLACS SDSS J0044+0113 gLS 00 44 02.900 +01 13 12.62           ~ 26 0
4 SLACS SDSS J0157-0056 gLS 01 57 58.936 -00 56 26.05           ~ 21 0
5 SLACS SDSS J0216-0813 gLS 02 16 52.5460001904 -08 13 45.314813820           ~ 34 0
6 SLACS SDSS J0252+0039 gLS 02 52 45.216 +00 39 58.35           ~ 34 0
7 SLACS SDSS J2111-0038 gLS 21 11 12.273 -00 38 26.53           ~ 3 0
8 SLACS SDSS J2141-0001 gLS 21 41 54.6809954832 -00 01 12.330169392           ~ 11 0
9 SLACS SDSS J2300+0022 gLS 23 00 53.1509681304 +00 22 37.970088744           ~ 36 0
10 SLACS SDSS J2341+0000 gLS 23 41 11.5699317864 +00 00 18.659748204           ~ 24 0
11 SLACS SDSS J2347-0005 gLS 23 47 28.082 -00 05 21.23           ~ 15 0

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