The University of Southampton
University of Southampton Institutional Repository

A multicomponent matched filter cluster confirmation tool for eROSITA: Initial application to the RASS and DES-SV data sets

A multicomponent matched filter cluster confirmation tool for eROSITA: Initial application to the RASS and DES-SV data sets
A multicomponent matched filter cluster confirmation tool for eROSITA: Initial application to the RASS and DES-SV data sets

We describe a multicomponent matched filter (MCMF) cluster confirmation tool designed for the study of large X-ray source catalogues produced by the upcoming X-ray all-sky survey mission eROSITA. We apply the method to confirm a sample of 88 clusters with redshifts 0.05 < z < 0.8 in the recently published 2RXS catalogue from the ROSAT All-Sky Survey (RASS) over the 208 deg2 region overlapped by the Dark Energy Survey (DES) Science Verification (DES-SV) data set. In our pilot study, we examine all X-ray sources, regardless of their extent. Our method employs a multicolour red sequence (RS) algorithm that incorporates the X-ray count rate and peak position in determining the region of interest for follow-up and extracts the positionally and colour-weighted optical richness λMCMF as a function of redshift for each source. Peaks in the λMCMF-redshift distribution are identified and used to extract photometric redshifts, richness and uncertainties. The significances of all optical counterparts are characterized using the distribution of richnesses defined along random lines of sight. These significances are used to extract cluster catalogues and to estimate the contamination by random superpositions of unassociated optical systems. The delivered photometric redshift accuracy is δz/(1 + z) = 0.010. We find a well-defined X-ray luminosity-λMCMF relation with an intrinsic scatter of δln (λMCMF|Lx) = 0.21. Matching our catalogue with the DES-SV redMaPPer catalogue yields good agreement in redshift and richness estimates; comparing our catalogue with the South Pole Telescope (SPT) selected clusters shows no inconsistencies. SPT clusters in our data set are consistent with the high-mass extension of the RASS-based λMCMF-mass relation.

Galaxies: clusters: general, Galaxies: clusters: intracluster medium, Galaxies: distances and redshifts, X-rays: galaxies: clusters
0035-8711
3324-3343
Klein, M.
c09d2d33-c311-42db-a1ad-91b1b6d21a6b
Mohr, J. J.
48ae5d2c-c6fb-4092-9f70-41c80f698523
Desai, S.
9fb3d948-7af8-43e1-8c9c-a11b6cc376ce
Israel, H.
def4e4aa-3e50-41a9-a8b0-9a9bb27a42e5
Allam, S.
0355ab50-73f1-493b-80dc-86c4d4422bee
Benoit-Lévy, A.
eea5849b-ea03-4147-8c3b-61255cbb30eb
Brooks, D.
c00d01f8-5a76-4054-956f-9a15038f632b
Buckley-Geer, E.
ad57a7c9-6dbf-4b3d-a69f-d6cc5bb4fb8a
Carnero Rosell, A.
d66191ef-a014-4029-bfe8-e9b3c653e3be
Carrasco Kind, M.
b569a608-55e3-4a2b-8875-d6602c32c980
Cunha, C. E.
a3d008fb-5351-46f5-8778-c09867fa89cb
da Costa, L. N.
b1ed9fd9-b99a-4012-8112-79cba46d8a23
Dietrich, J. P.
3eb1ee1f-9bd5-47c7-b116-85c6365becc1
Eifler, T. F.
0ef93d51-0f94-46cb-b882-a569b9a6b598
Evrard, A. E.
b72fc85a-1ab1-4c95-afad-e1ff76f8190c
Frieman, J.
6c34b206-537c-429c-9aeb-5df1d1e5e656
Gruen, D.
8d960f6a-1219-4ce1-9312-616e463616eb
Gruendl, R. A.
81783218-3c05-4a4a-8f7b-d123d50ba027
Gutierrez, G.
78403287-6c1e-4238-9238-06c3a714f5cd
Honscheid, K.
c505a24c-7e4d-4761-a84d-5262868372ae
James, D. J.
2c41d97c-8486-4379-b253-e5896572e81a
Kuehn, K.
c8275e43-4cd6-44f5-9cce-8475d0e5f7de
Lima, M.
01e865ee-c676-4f04-9b0a-aaeb3b4138fa
Maia, M. A.G.
98ea0959-ba94-454f-b826-a589acf2297c
March, M.
4fb8f459-3745-4426-9fc0-a9949613087c
Melchior, P.
a10454a8-5f20-4eda-a63e-289fde692fc6
Menanteau, F.
d971ef80-9290-4fb1-87bf-d9b5e1e80821
Miquel, R.
acd92fc5-f50f-4ae0-afe8-01db537b6e36
Plazas, A. A.
aafd9982-a941-421d-a7fe-0c989d230dbd
Reil, K.
868ec972-54cf-4028-a70d-26bd8927c990
Romer, A. K.
bf008fd7-6d2c-4dcb-ab16-06617b8fc575
Sanchez, E.
88121f38-9175-4c1a-8ed7-4e4ecc3d9544
Santiago, B.
ba1c2da1-fedc-433a-ab4c-26c51a121e4d
Scarpine, V.
dc6fe7f7-d923-434b-81d7-fa48ff16b705
Schubnell, M.
076bbd0d-6b89-4186-9b9b-94e01ca43cdb
Sevilla-Noarbe, I.
a4690b61-feca-4933-887c-121a9f343470
Smith, M.
8bdc74e1-a37b-434d-ae75-82763109bf7a
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
the DES Collaboration
Klein, M.
c09d2d33-c311-42db-a1ad-91b1b6d21a6b
Mohr, J. J.
48ae5d2c-c6fb-4092-9f70-41c80f698523
Desai, S.
9fb3d948-7af8-43e1-8c9c-a11b6cc376ce
Israel, H.
def4e4aa-3e50-41a9-a8b0-9a9bb27a42e5
Allam, S.
0355ab50-73f1-493b-80dc-86c4d4422bee
Benoit-Lévy, A.
eea5849b-ea03-4147-8c3b-61255cbb30eb
Brooks, D.
c00d01f8-5a76-4054-956f-9a15038f632b
Buckley-Geer, E.
ad57a7c9-6dbf-4b3d-a69f-d6cc5bb4fb8a
Carnero Rosell, A.
d66191ef-a014-4029-bfe8-e9b3c653e3be
Carrasco Kind, M.
b569a608-55e3-4a2b-8875-d6602c32c980
Cunha, C. E.
a3d008fb-5351-46f5-8778-c09867fa89cb
da Costa, L. N.
b1ed9fd9-b99a-4012-8112-79cba46d8a23
Dietrich, J. P.
3eb1ee1f-9bd5-47c7-b116-85c6365becc1
Eifler, T. F.
0ef93d51-0f94-46cb-b882-a569b9a6b598
Evrard, A. E.
b72fc85a-1ab1-4c95-afad-e1ff76f8190c
Frieman, J.
6c34b206-537c-429c-9aeb-5df1d1e5e656
Gruen, D.
8d960f6a-1219-4ce1-9312-616e463616eb
Gruendl, R. A.
81783218-3c05-4a4a-8f7b-d123d50ba027
Gutierrez, G.
78403287-6c1e-4238-9238-06c3a714f5cd
Honscheid, K.
c505a24c-7e4d-4761-a84d-5262868372ae
James, D. J.
2c41d97c-8486-4379-b253-e5896572e81a
Kuehn, K.
c8275e43-4cd6-44f5-9cce-8475d0e5f7de
Lima, M.
01e865ee-c676-4f04-9b0a-aaeb3b4138fa
Maia, M. A.G.
98ea0959-ba94-454f-b826-a589acf2297c
March, M.
4fb8f459-3745-4426-9fc0-a9949613087c
Melchior, P.
a10454a8-5f20-4eda-a63e-289fde692fc6
Menanteau, F.
d971ef80-9290-4fb1-87bf-d9b5e1e80821
Miquel, R.
acd92fc5-f50f-4ae0-afe8-01db537b6e36
Plazas, A. A.
aafd9982-a941-421d-a7fe-0c989d230dbd
Reil, K.
868ec972-54cf-4028-a70d-26bd8927c990
Romer, A. K.
bf008fd7-6d2c-4dcb-ab16-06617b8fc575
Sanchez, E.
88121f38-9175-4c1a-8ed7-4e4ecc3d9544
Santiago, B.
ba1c2da1-fedc-433a-ab4c-26c51a121e4d
Scarpine, V.
dc6fe7f7-d923-434b-81d7-fa48ff16b705
Schubnell, M.
076bbd0d-6b89-4186-9b9b-94e01ca43cdb
Sevilla-Noarbe, I.
a4690b61-feca-4933-887c-121a9f343470
Smith, M.
8bdc74e1-a37b-434d-ae75-82763109bf7a
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

Klein, M., Mohr, J. J., Desai, S., Israel, H., Allam, S., Benoit-Lévy, A., Brooks, D., Buckley-Geer, E., Carnero Rosell, A., Carrasco Kind, M., Cunha, C. E., da Costa, L. N., Dietrich, J. P., Eifler, T. F., Evrard, A. E., Frieman, J., Gruen, D., Gruendl, R. A., Gutierrez, G., Honscheid, K., James, D. J., Kuehn, K., Lima, M., Maia, M. A.G., March, M., Melchior, P., Menanteau, F., Miquel, R., Plazas, A. A., Reil, K., Romer, A. K., Sanchez, E., Santiago, B., Scarpine, V., Schubnell, M., Sevilla-Noarbe, I., Smith, M., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E.C. and Tarle, G. , the DES Collaboration (2018) A multicomponent matched filter cluster confirmation tool for eROSITA: Initial application to the RASS and DES-SV data sets. Monthly Notices of the Royal Astronomical Society, 474 (3), 3324-3343. (doi:10.1093/mnras/stx2929).

Record type: Article

Abstract

We describe a multicomponent matched filter (MCMF) cluster confirmation tool designed for the study of large X-ray source catalogues produced by the upcoming X-ray all-sky survey mission eROSITA. We apply the method to confirm a sample of 88 clusters with redshifts 0.05 < z < 0.8 in the recently published 2RXS catalogue from the ROSAT All-Sky Survey (RASS) over the 208 deg2 region overlapped by the Dark Energy Survey (DES) Science Verification (DES-SV) data set. In our pilot study, we examine all X-ray sources, regardless of their extent. Our method employs a multicolour red sequence (RS) algorithm that incorporates the X-ray count rate and peak position in determining the region of interest for follow-up and extracts the positionally and colour-weighted optical richness λMCMF as a function of redshift for each source. Peaks in the λMCMF-redshift distribution are identified and used to extract photometric redshifts, richness and uncertainties. The significances of all optical counterparts are characterized using the distribution of richnesses defined along random lines of sight. These significances are used to extract cluster catalogues and to estimate the contamination by random superpositions of unassociated optical systems. The delivered photometric redshift accuracy is δz/(1 + z) = 0.010. We find a well-defined X-ray luminosity-λMCMF relation with an intrinsic scatter of δln (λMCMF|Lx) = 0.21. Matching our catalogue with the DES-SV redMaPPer catalogue yields good agreement in redshift and richness estimates; comparing our catalogue with the South Pole Telescope (SPT) selected clusters shows no inconsistencies. SPT clusters in our data set are consistent with the high-mass extension of the RASS-based λMCMF-mass relation.

Full text not available from this repository.

More information

Accepted/In Press date: 9 November 2017
e-pub ahead of print date: 14 November 2017
Published date: 1 March 2018
Keywords: Galaxies: clusters: general, Galaxies: clusters: intracluster medium, Galaxies: distances and redshifts, X-rays: galaxies: clusters

Identifiers

Local EPrints ID: 417455
URI: https://eprints.soton.ac.uk/id/eprint/417455
ISSN: 0035-8711
PURE UUID: 30a8fb91-768d-4954-9871-97d227e72b02

Catalogue record

Date deposited: 31 Jan 2018 17:30
Last modified: 20 Sep 2018 16:30

Export record

Altmetrics

Contributors

Author: M. Klein
Author: J. J. Mohr
Author: S. Desai
Author: H. Israel
Author: S. Allam
Author: A. Benoit-Lévy
Author: D. Brooks
Author: E. Buckley-Geer
Author: A. Carnero Rosell
Author: M. Carrasco Kind
Author: C. E. Cunha
Author: L. N. da Costa
Author: J. P. Dietrich
Author: T. F. Eifler
Author: A. E. Evrard
Author: J. Frieman
Author: D. Gruen
Author: R. A. Gruendl
Author: G. Gutierrez
Author: K. Honscheid
Author: D. J. James
Author: K. Kuehn
Author: M. Lima
Author: M. A.G. Maia
Author: M. March
Author: P. Melchior
Author: F. Menanteau
Author: R. Miquel
Author: A. A. Plazas
Author: K. Reil
Author: A. K. Romer
Author: E. Sanchez
Author: B. Santiago
Author: V. Scarpine
Author: M. Schubnell
Author: I. Sevilla-Noarbe
Author: M. Smith
Author: M. Soares-Santos
Author: F. Sobreira
Author: E. Suchyta
Author: M. E.C. Swanson
Author: G. Tarle

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×