KiDS-i-800: Comparing weak gravitational lensing measurements from same-sky surveys
We present a weak gravitational lensing analysis of 815 deg2of i-band imaging from the Kilo-Degree Survey (KiDS-i-800). In contrast to the deep r-band observations, which take priority during excellent seeing conditions and form the primary KiDS data set (KiDS-r-450), the complementary yet shallower...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
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Oxford University Press
2018
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| _version_ | 1797096749436764160 |
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| author | Amon, A Heymans, C Klaes, D Erben, T Blake, C Hildebrandt, H Hoekstra, H Kuijken, K Miller, L Morrison, C Choi, A De Jong, J Glazebrook, K Irisarri, N Joachimi, B Joudaki, S Kannawadi, A Lidman, C Napolitano, N Parkinson, D Schneider, P Van Uitert, E Viola, M Wolf, C |
| author_facet | Amon, A Heymans, C Klaes, D Erben, T Blake, C Hildebrandt, H Hoekstra, H Kuijken, K Miller, L Morrison, C Choi, A De Jong, J Glazebrook, K Irisarri, N Joachimi, B Joudaki, S Kannawadi, A Lidman, C Napolitano, N Parkinson, D Schneider, P Van Uitert, E Viola, M Wolf, C |
| author_sort | Amon, A |
| collection | OXFORD |
| description | We present a weak gravitational lensing analysis of 815 deg2of i-band imaging from the Kilo-Degree Survey (KiDS-i-800). In contrast to the deep r-band observations, which take priority during excellent seeing conditions and form the primary KiDS data set (KiDS-r-450), the complementary yet shallower KiDS-i-800 spans a wide range of observing conditions. The overlapping KiDS-i-800 and KiDS-r-450 imaging therefore provides a unique opportunity to assess the robustness of weak lensing measurements. In our analysis we introduce two new 'null' tests. The 'nulled' two-point shear correlation function uses a matched catalogue to show that the calibrated KiDS-i-800 and KiDS-r-450 shear measurements agree at the level of 1 ± 4 per cent.We use five galaxy lens samples to determine a 'nulled' galaxy-galaxy lensing signal from the full KiDS-i-800 and KiDS-r-450 surveys and find that the measurements agree to 7 ± 5 per cent when the KiDS-i-800 source redshift distribution is calibrated using either spectroscopic redshifts, or the 30-band photometric redshifts from the COSMOS survey. |
| first_indexed | 2024-03-07T04:45:59Z |
| format | Journal article |
| id | oxford-uuid:d3492846-1631-4fb6-8be6-75fd57aec206 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T04:45:59Z |
| publishDate | 2018 |
| publisher | Oxford University Press |
| record_format | dspace |
| spelling | oxford-uuid:d3492846-1631-4fb6-8be6-75fd57aec2062022-03-27T08:10:17ZKiDS-i-800: Comparing weak gravitational lensing measurements from same-sky surveysJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:d3492846-1631-4fb6-8be6-75fd57aec206Symplectic Elements at OxfordOxford University Press2018Amon, AHeymans, CKlaes, DErben, TBlake, CHildebrandt, HHoekstra, HKuijken, KMiller, LMorrison, CChoi, ADe Jong, JGlazebrook, KIrisarri, NJoachimi, BJoudaki, SKannawadi, ALidman, CNapolitano, NParkinson, DSchneider, PVan Uitert, EViola, MWolf, CWe present a weak gravitational lensing analysis of 815 deg2of i-band imaging from the Kilo-Degree Survey (KiDS-i-800). In contrast to the deep r-band observations, which take priority during excellent seeing conditions and form the primary KiDS data set (KiDS-r-450), the complementary yet shallower KiDS-i-800 spans a wide range of observing conditions. The overlapping KiDS-i-800 and KiDS-r-450 imaging therefore provides a unique opportunity to assess the robustness of weak lensing measurements. In our analysis we introduce two new 'null' tests. The 'nulled' two-point shear correlation function uses a matched catalogue to show that the calibrated KiDS-i-800 and KiDS-r-450 shear measurements agree at the level of 1 ± 4 per cent.We use five galaxy lens samples to determine a 'nulled' galaxy-galaxy lensing signal from the full KiDS-i-800 and KiDS-r-450 surveys and find that the measurements agree to 7 ± 5 per cent when the KiDS-i-800 source redshift distribution is calibrated using either spectroscopic redshifts, or the 30-band photometric redshifts from the COSMOS survey. |
| spellingShingle | Amon, A Heymans, C Klaes, D Erben, T Blake, C Hildebrandt, H Hoekstra, H Kuijken, K Miller, L Morrison, C Choi, A De Jong, J Glazebrook, K Irisarri, N Joachimi, B Joudaki, S Kannawadi, A Lidman, C Napolitano, N Parkinson, D Schneider, P Van Uitert, E Viola, M Wolf, C KiDS-i-800: Comparing weak gravitational lensing measurements from same-sky surveys |
| title | KiDS-i-800: Comparing weak gravitational lensing measurements from same-sky surveys |
| title_full | KiDS-i-800: Comparing weak gravitational lensing measurements from same-sky surveys |
| title_fullStr | KiDS-i-800: Comparing weak gravitational lensing measurements from same-sky surveys |
| title_full_unstemmed | KiDS-i-800: Comparing weak gravitational lensing measurements from same-sky surveys |
| title_short | KiDS-i-800: Comparing weak gravitational lensing measurements from same-sky surveys |
| title_sort | kids i 800 comparing weak gravitational lensing measurements from same sky surveys |
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