Dark Energy Survey Year 1 results: Cross-correlation redshifts - methods and systematics characterization
Dark Energy Survey Year 1 results: Cross-correlation redshifts - methods and systematics characterization
We use numerical simulations to characterize the performance of a clustering-based method to calibrate photometric redshift biases. In particular, we cross-correlate the weak lensing source galaxies from the Dark Energy Survey Year 1 sample with redMaGiC galaxies (luminous red galaxies with secure photometric redshifts) to estimate the redshift distribution of the former sample. The recovered redshift distributions are used to calibrate the photometric redshift bias of standard photo-z methods applied to the same source galaxy sample.We apply the method to two photo-z codes run in our simulated data: Bayesian Photometric Redshift and Directional Neighbourhood Fitting. We characterize the systematic uncertainties of our calibration procedure, and find that these systematic uncertainties dominate our error budget. The dominant systematics are due to our assumption of unevolving bias and clustering across each redshift bin, and to differences between the shapes of the redshift distributions derived by clustering versus photo-zs. The systematic uncertainty in the mean redshift bias of the source galaxy sample is Δz ≲ 0.02, though the precise value depends on the redshift bin under consideration. We discuss possible ways to mitigate the impact of our dominant systematics in future analyses.
Cosmology: Observations, Galaxies: Distances and redshifts
1664-1682
Gatti, M.
be9e1f3e-3cb4-4cc3-9d64-01bc9547d290
Vielzeuf, P.
58cb7cf8-d759-4879-85b6-f3a1a13615a9
Cawthon, R.
511746c8-55f1-4877-b481-d6b6488030e9
Rau, M.M.
2eff1a56-e334-4e07-a156-69d034b6205b
DeRose, J.
0e595bcc-0c8b-4d69-9845-83ab92a229f7
De Vicente, J.
f1d6022a-1d82-4b26-b421-4627aa5a5568
Alarcon, A.
df0b9a08-759b-4a6b-ad40-5e4c2406e984
Rozo, E.
9008ecfe-f138-4c4c-a88b-09c32549f7c4
Gaztanaga, E.
3a3f63dd-9666-448c-9ec6-10e53fc0dc1a
Hoyle, B.
fdc773d9-a7f6-45a5-8572-c195bc6b414c
Miquel, R.
acd92fc5-f50f-4ae0-afe8-01db537b6e36
Bernstein, G. M.
9d12d964-5827-488e-9de3-c4b0b517e8aa
Bonnett, C.
7d27b53e-cb7f-4451-85c2-10b97f02fe49
Rosell, A. Carnero
d66191ef-a014-4029-bfe8-e9b3c653e3be
Castander, F.J.
b61356c2-f7f5-4da7-9322-b9eda0b0081a
Chang, C.
296ef50d-c9eb-4f0e-a336-9a6124a905a7
da Costa, L.N.
b1ed9fd9-b99a-4012-8112-79cba46d8a23
Gruen, D.
8d960f6a-1219-4ce1-9312-616e463616eb
Gschwend, J.
cfbbfd77-feea-4e19-91b7-f40b8969f453
Hartley, W.G.
f8388551-09ca-4c65-88ea-e0f5d9090d2d
Lin, H.
703a582c-0cd8-4724-9072-b7e1241fae63
MacCrann, N.
c0bfddf4-8911-4f7d-bfb3-65e1f7f976cf
Maia, M.A.G.
98ea0959-ba94-454f-b826-a589acf2297c
Ogando, R.L.C.
2af3ab81-7deb-456f-bce7-67ade23683d3
Roodman, A.
e4b6b3b1-7c56-4112-b281-2f63b38e99d5
Sevilla-Noarbe, I.
a4690b61-feca-4933-887c-121a9f343470
Troxel, M. A.
98179534-4eec-4118-9883-713aef806609
Wechsler, R.H.
b9ffbfa5-0c52-46fb-b570-bde2c89f4340
Asorey, J.
c8481389-854f-41ed-9fa5-adcb64ed8be7
Davis, T.M.
466dfec4-c506-41fb-8b23-ea6c3c97e15b
Glazebrook, K.
a0f7c538-1e8c-4ea8-9f49-a5ab0eb353f4
Hinton, S.R.
9e2f00d6-7026-4491-a28e-17d5880f65d1
Lewis, G.
7a7b9fa6-bb3c-4a5e-83ec-648e272ec873
Lidman, C.
70c80609-d55e-4ca6-b057-aed4a00b4b89
Macaulay, E.
2f5ea6e5-aede-431a-8ea9-9a79cf4d39b5
Möller, A.
64e6f7fe-41ac-498b-9f69-c88a0f7981c4
O'Neill, C.R.
bb6d9cdc-2f15-4ca9-9e53-c6f99f95dc65
Sommer, N.E.
d60a6dac-111c-44a1-8933-c22e20d410bd
Uddin, S.A.
b9c7578a-d64b-4852-80e5-c53d7fb8230b
Yuan, F.
b14622a1-ebc8-428b-85e1-72881fb8bfa6
Zhang, B.
097d9ce6-3714-4961-9b27-e5934aada287
Abbott, T.M.C.
6afa6308-fd36-4189-aef0-d86c784311d9
Allam, S.
0355ab50-73f1-493b-80dc-86c4d4422bee
Annis, J.
b21af104-dcad-472a-8424-b49d41d41c06
Bechtol, K.
196af8f4-f0d6-4e85-9d03-7259b7210b23
Brooks, D.
4e6fdec5-14bb-4e8e-805f-ef09976328c4
Burke, D.L.
0d20fba0-9285-4cb4-b076-312166fc7ad7
Carollo, D.
a1aaebdc-b44f-4397-9a39-8e1ce3ba0fa5
Kind, M. Carrasco
b569a608-55e3-4a2b-8875-d6602c32c980
Carretero, J.
081b0f5d-7e69-469c-a22d-5b851f9b8d1d
Cunha, C.E.
2251baca-c601-4b62-ac1c-51a43bd1e421
D'Andrea, C.B.
4befc380-f47c-49cc-a84e-2e2d2ac14edd
DePoy, D.L.
6fc55c82-981a-42d9-bc03-3c970ca04bdb
Desai, S.
9fb3d948-7af8-43e1-8c9c-a11b6cc376ce
Eifler, T.F.
0ef93d51-0f94-46cb-b882-a569b9a6b598
Evrard, A.E.
b72fc85a-1ab1-4c95-afad-e1ff76f8190c
Flaugher, B.
cca72cda-37e5-4d1b-a792-c11946615fb5
Fosalba, P.
7309d371-b57b-4fb5-99f2-1dd419e46285
Frieman, J.
6c34b206-537c-429c-9aeb-5df1d1e5e656
García-Bellido, J.
0d901d62-f268-4982-a08b-880c578ab3d8
Gerdes, D.W.
63df801a-6703-4911-902c-1115327d79dd
Goldstein, D. A.
3903f512-8f72-422e-bb4f-ea045e595a6a
Gruendl, R.A.
81783218-3c05-4a4a-8f7b-d123d50ba027
Gutierrez, G.
78403287-6c1e-4238-9238-06c3a714f5cd
Honscheid, K.
c505a24c-7e4d-4761-a84d-5262868372ae
Hoormann, J.K.
0e5cf0ac-2b48-463a-b69a-f3b57213efaf
Jain, B.
b7fb4fa3-ec72-4bb3-89f9-3f8910d2d1ef
James, D.J.
2c41d97c-8486-4379-b253-e5896572e81a
Jarvis, M.
3fd4f2bf-3b06-4058-af6a-093610b28dfd
Jeltema, T.
c7ceea0d-1f0c-42e2-883d-d83e976ab6ec
Johnson, M.W.G.
0f94090f-570c-4418-959a-a9ac94cc5bf5
Krause, E.
db6d7dbe-6a0d-4eb1-97f5-bfb184d5cdfc
Kuehn, K.
c8275e43-4cd6-44f5-9cce-8475d0e5f7de
Kuhlmann, S.
e3c8cf69-3749-45fc-89cf-8a6499ac12ba
Kuropatkin, N.
328b5b5c-833e-4299-9914-578624826327
Li, T.S.
7370e91b-a7a3-498f-83df-911efcdada99
Lima, M.
01e865ee-c676-4f04-9b0a-aaeb3b4138fa
Marshall, J.L.
a80432e4-3031-4224-b1cf-313bc1bda078
Melchior, P.
a10454a8-5f20-4eda-a63e-289fde692fc6
Menanteau, F.
d971ef80-9290-4fb1-87bf-d9b5e1e80821
Nichol, R. C.
0c9a8540-1f97-4fd7-bc77-e18db450e632
Nord, B.
1462cfe8-7c0e-4418-abda-703350e91b11
Plazas, A.A.
aafd9982-a941-421d-a7fe-0c989d230dbd
Reil, K.
868ec972-54cf-4028-a70d-26bd8927c990
Rykoff, E.S.
1f2c7914-3f30-4c15-aee5-8e7bb851d025
Sako, M.
c55b2dbb-04bd-4759-8c37-4d640f09c286
Sanchez, E.
8c460625-8a86-4050-baf5-c0d018fcd770
Scarpine, V.
dc6fe7f7-d923-434b-81d7-fa48ff16b705
Schubnell, M.
076bbd0d-6b89-4186-9b9b-94e01ca43cdb
Sheldon, E.
34fc88df-f247-4b45-bf17-5b46f8abf5c5
Smith, M.
8bdc74e1-a37b-434d-ae75-82763109bf7a
Smith, R.C.
2890e5a7-d3ae-4850-924a-be58b7a15a73
Soares-Santos, M.
0a0a5188-44fe-44c4-98c6-f462dee6dd8b
Sobreira, F.
eef47e5c-d638-4eed-86b6-6ce312da75d5
Suchyta, E.
632e180b-6712-4435-b31e-7706c0ed1b05
Swanson, M.E.C.
5f7dc788-a30e-4a8e-b925-67fbb97015f5
Tarle, G.
d5a81816-3f96-42c2-88ef-f86969bedc6e
Thomas, D.
250eb0a5-9a34-47cb-9f86-ac964bd11a25
Tucker, B.E.
7dc5b046-5bd6-4392-9984-eb1485496e4e
Tucker, D.L.
61344e09-5728-4900-b1de-617c05ea11a4
Vikram, V.
5f868b6a-86ba-4fed-8fc4-58384dbf3729
Walker, A.R.
4ac855c5-0036-4a41-a846-ff56a13759c4
Weller, J.
5fca3a44-a92a-4493-b687-9f9b6a690b7a
Wester, W.
6b4b1314-b93d-48fe-a0a3-16584a123e06
Wolf, R.C.
314d03a7-1628-4a50-9d77-c2fd19cadb6e
21 June 2018
Gatti, M.
be9e1f3e-3cb4-4cc3-9d64-01bc9547d290
Vielzeuf, P.
58cb7cf8-d759-4879-85b6-f3a1a13615a9
Cawthon, R.
511746c8-55f1-4877-b481-d6b6488030e9
Rau, M.M.
2eff1a56-e334-4e07-a156-69d034b6205b
DeRose, J.
0e595bcc-0c8b-4d69-9845-83ab92a229f7
De Vicente, J.
f1d6022a-1d82-4b26-b421-4627aa5a5568
Alarcon, A.
df0b9a08-759b-4a6b-ad40-5e4c2406e984
Rozo, E.
9008ecfe-f138-4c4c-a88b-09c32549f7c4
Gaztanaga, E.
3a3f63dd-9666-448c-9ec6-10e53fc0dc1a
Hoyle, B.
fdc773d9-a7f6-45a5-8572-c195bc6b414c
Miquel, R.
acd92fc5-f50f-4ae0-afe8-01db537b6e36
Bernstein, G. M.
9d12d964-5827-488e-9de3-c4b0b517e8aa
Bonnett, C.
7d27b53e-cb7f-4451-85c2-10b97f02fe49
Rosell, A. Carnero
d66191ef-a014-4029-bfe8-e9b3c653e3be
Castander, F.J.
b61356c2-f7f5-4da7-9322-b9eda0b0081a
Chang, C.
296ef50d-c9eb-4f0e-a336-9a6124a905a7
da Costa, L.N.
b1ed9fd9-b99a-4012-8112-79cba46d8a23
Gruen, D.
8d960f6a-1219-4ce1-9312-616e463616eb
Gschwend, J.
cfbbfd77-feea-4e19-91b7-f40b8969f453
Hartley, W.G.
f8388551-09ca-4c65-88ea-e0f5d9090d2d
Lin, H.
703a582c-0cd8-4724-9072-b7e1241fae63
MacCrann, N.
c0bfddf4-8911-4f7d-bfb3-65e1f7f976cf
Maia, M.A.G.
98ea0959-ba94-454f-b826-a589acf2297c
Ogando, R.L.C.
2af3ab81-7deb-456f-bce7-67ade23683d3
Roodman, A.
e4b6b3b1-7c56-4112-b281-2f63b38e99d5
Sevilla-Noarbe, I.
a4690b61-feca-4933-887c-121a9f343470
Troxel, M. A.
98179534-4eec-4118-9883-713aef806609
Wechsler, R.H.
b9ffbfa5-0c52-46fb-b570-bde2c89f4340
Asorey, J.
c8481389-854f-41ed-9fa5-adcb64ed8be7
Davis, T.M.
466dfec4-c506-41fb-8b23-ea6c3c97e15b
Glazebrook, K.
a0f7c538-1e8c-4ea8-9f49-a5ab0eb353f4
Hinton, S.R.
9e2f00d6-7026-4491-a28e-17d5880f65d1
Lewis, G.
7a7b9fa6-bb3c-4a5e-83ec-648e272ec873
Lidman, C.
70c80609-d55e-4ca6-b057-aed4a00b4b89
Macaulay, E.
2f5ea6e5-aede-431a-8ea9-9a79cf4d39b5
Möller, A.
64e6f7fe-41ac-498b-9f69-c88a0f7981c4
O'Neill, C.R.
bb6d9cdc-2f15-4ca9-9e53-c6f99f95dc65
Sommer, N.E.
d60a6dac-111c-44a1-8933-c22e20d410bd
Uddin, S.A.
b9c7578a-d64b-4852-80e5-c53d7fb8230b
Yuan, F.
b14622a1-ebc8-428b-85e1-72881fb8bfa6
Zhang, B.
097d9ce6-3714-4961-9b27-e5934aada287
Abbott, T.M.C.
6afa6308-fd36-4189-aef0-d86c784311d9
Allam, S.
0355ab50-73f1-493b-80dc-86c4d4422bee
Annis, J.
b21af104-dcad-472a-8424-b49d41d41c06
Bechtol, K.
196af8f4-f0d6-4e85-9d03-7259b7210b23
Brooks, D.
4e6fdec5-14bb-4e8e-805f-ef09976328c4
Burke, D.L.
0d20fba0-9285-4cb4-b076-312166fc7ad7
Carollo, D.
a1aaebdc-b44f-4397-9a39-8e1ce3ba0fa5
Kind, M. Carrasco
b569a608-55e3-4a2b-8875-d6602c32c980
Carretero, J.
081b0f5d-7e69-469c-a22d-5b851f9b8d1d
Cunha, C.E.
2251baca-c601-4b62-ac1c-51a43bd1e421
D'Andrea, C.B.
4befc380-f47c-49cc-a84e-2e2d2ac14edd
DePoy, D.L.
6fc55c82-981a-42d9-bc03-3c970ca04bdb
Desai, S.
9fb3d948-7af8-43e1-8c9c-a11b6cc376ce
Eifler, T.F.
0ef93d51-0f94-46cb-b882-a569b9a6b598
Evrard, A.E.
b72fc85a-1ab1-4c95-afad-e1ff76f8190c
Flaugher, B.
cca72cda-37e5-4d1b-a792-c11946615fb5
Fosalba, P.
7309d371-b57b-4fb5-99f2-1dd419e46285
Frieman, J.
6c34b206-537c-429c-9aeb-5df1d1e5e656
García-Bellido, J.
0d901d62-f268-4982-a08b-880c578ab3d8
Gerdes, D.W.
63df801a-6703-4911-902c-1115327d79dd
Goldstein, D. A.
3903f512-8f72-422e-bb4f-ea045e595a6a
Gruendl, R.A.
81783218-3c05-4a4a-8f7b-d123d50ba027
Gutierrez, G.
78403287-6c1e-4238-9238-06c3a714f5cd
Honscheid, K.
c505a24c-7e4d-4761-a84d-5262868372ae
Hoormann, J.K.
0e5cf0ac-2b48-463a-b69a-f3b57213efaf
Jain, B.
b7fb4fa3-ec72-4bb3-89f9-3f8910d2d1ef
James, D.J.
2c41d97c-8486-4379-b253-e5896572e81a
Jarvis, M.
3fd4f2bf-3b06-4058-af6a-093610b28dfd
Jeltema, T.
c7ceea0d-1f0c-42e2-883d-d83e976ab6ec
Johnson, M.W.G.
0f94090f-570c-4418-959a-a9ac94cc5bf5
Krause, E.
db6d7dbe-6a0d-4eb1-97f5-bfb184d5cdfc
Kuehn, K.
c8275e43-4cd6-44f5-9cce-8475d0e5f7de
Kuhlmann, S.
e3c8cf69-3749-45fc-89cf-8a6499ac12ba
Kuropatkin, N.
328b5b5c-833e-4299-9914-578624826327
Li, T.S.
7370e91b-a7a3-498f-83df-911efcdada99
Lima, M.
01e865ee-c676-4f04-9b0a-aaeb3b4138fa
Marshall, J.L.
a80432e4-3031-4224-b1cf-313bc1bda078
Melchior, P.
a10454a8-5f20-4eda-a63e-289fde692fc6
Menanteau, F.
d971ef80-9290-4fb1-87bf-d9b5e1e80821
Nichol, R. C.
0c9a8540-1f97-4fd7-bc77-e18db450e632
Nord, B.
1462cfe8-7c0e-4418-abda-703350e91b11
Plazas, A.A.
aafd9982-a941-421d-a7fe-0c989d230dbd
Reil, K.
868ec972-54cf-4028-a70d-26bd8927c990
Rykoff, E.S.
1f2c7914-3f30-4c15-aee5-8e7bb851d025
Sako, M.
c55b2dbb-04bd-4759-8c37-4d640f09c286
Sanchez, E.
8c460625-8a86-4050-baf5-c0d018fcd770
Scarpine, V.
dc6fe7f7-d923-434b-81d7-fa48ff16b705
Schubnell, M.
076bbd0d-6b89-4186-9b9b-94e01ca43cdb
Sheldon, E.
34fc88df-f247-4b45-bf17-5b46f8abf5c5
Smith, M.
8bdc74e1-a37b-434d-ae75-82763109bf7a
Smith, R.C.
2890e5a7-d3ae-4850-924a-be58b7a15a73
Soares-Santos, M.
0a0a5188-44fe-44c4-98c6-f462dee6dd8b
Sobreira, F.
eef47e5c-d638-4eed-86b6-6ce312da75d5
Suchyta, E.
632e180b-6712-4435-b31e-7706c0ed1b05
Swanson, M.E.C.
5f7dc788-a30e-4a8e-b925-67fbb97015f5
Tarle, G.
d5a81816-3f96-42c2-88ef-f86969bedc6e
Thomas, D.
250eb0a5-9a34-47cb-9f86-ac964bd11a25
Tucker, B.E.
7dc5b046-5bd6-4392-9984-eb1485496e4e
Tucker, D.L.
61344e09-5728-4900-b1de-617c05ea11a4
Vikram, V.
5f868b6a-86ba-4fed-8fc4-58384dbf3729
Walker, A.R.
4ac855c5-0036-4a41-a846-ff56a13759c4
Weller, J.
5fca3a44-a92a-4493-b687-9f9b6a690b7a
Wester, W.
6b4b1314-b93d-48fe-a0a3-16584a123e06
Wolf, R.C.
314d03a7-1628-4a50-9d77-c2fd19cadb6e