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 recent...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Oxford University Press
2017
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Online Access: | http://sro.sussex.ac.uk/id/eprint/72581/ http://sro.sussex.ac.uk/id/eprint/72581/1/__smbhome.uscs.susx.ac.uk_bw233_Desktop_SRO_SRO%20-%20Kathy%20Romer_stx2929.pdf https://doi.org/10.1093/mnras/stx2929 |
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ftunivsussex:oai:sro.sussex.ac.uk:72581 2023-07-30T04:06:55+02:00 A multicomponent matched filter cluster confirmation tool for eROSITA: initial application to the RASS and DES-SV data sets Klein, M Mohr, J J Desai, S Israel, H Allam, S Benoit-Lévy, A Brokks, 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 Tarle, G The DES Collaboration 2017-11-14 application/pdf http://sro.sussex.ac.uk/id/eprint/72581/ http://sro.sussex.ac.uk/id/eprint/72581/1/__smbhome.uscs.susx.ac.uk_bw233_Desktop_SRO_SRO%20-%20Kathy%20Romer_stx2929.pdf https://doi.org/10.1093/mnras/stx2929 en eng Oxford University Press http://sro.sussex.ac.uk/id/eprint/72581/1/__smbhome.uscs.susx.ac.uk_bw233_Desktop_SRO_SRO%20-%20Kathy%20Romer_stx2929.pdf Klein, M, Mohr, J J, Desai, S, Israel, H, Allam, S, Benoit-Lévy, A, Brokks, 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, Tarle, G, Romer, A K and The DES Collaboration, (2017) 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). pp. 3324-3343. ISSN 0035-8711 QC Physics Article PeerReviewed 2017 ftunivsussex https://doi.org/10.1093/mnras/stx2929 2023-07-11T20:37:38Z 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. Article in Journal/Newspaper South pole University of Sussex: Sussex Research Online Source Peaks ENVELOPE(-130.771,-130.771,64.467,64.467) South Pole Monthly Notices of the Royal Astronomical Society 474 3 3324 3343 |
institution |
Open Polar |
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University of Sussex: Sussex Research Online |
op_collection_id |
ftunivsussex |
language |
English |
topic |
QC Physics |
spellingShingle |
QC Physics Klein, M Mohr, J J Desai, S Israel, H Allam, S Benoit-Lévy, A Brokks, 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 Tarle, G The DES Collaboration A multicomponent matched filter cluster confirmation tool for eROSITA: initial application to the RASS and DES-SV data sets |
topic_facet |
QC Physics |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Klein, M Mohr, J J Desai, S Israel, H Allam, S Benoit-Lévy, A Brokks, 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 Tarle, G The DES Collaboration |
author_facet |
Klein, M Mohr, J J Desai, S Israel, H Allam, S Benoit-Lévy, A Brokks, 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 Tarle, G The DES Collaboration |
author_sort |
Klein, M |
title |
A multicomponent matched filter cluster confirmation tool for eROSITA: initial application to the RASS and DES-SV data sets |
title_short |
A multicomponent matched filter cluster confirmation tool for eROSITA: initial application to the RASS and DES-SV data sets |
title_full |
A multicomponent matched filter cluster confirmation tool for eROSITA: initial application to the RASS and DES-SV data sets |
title_fullStr |
A multicomponent matched filter cluster confirmation tool for eROSITA: initial application to the RASS and DES-SV data sets |
title_full_unstemmed |
A multicomponent matched filter cluster confirmation tool for eROSITA: initial application to the RASS and DES-SV data sets |
title_sort |
multicomponent matched filter cluster confirmation tool for erosita: initial application to the rass and des-sv data sets |
publisher |
Oxford University Press |
publishDate |
2017 |
url |
http://sro.sussex.ac.uk/id/eprint/72581/ http://sro.sussex.ac.uk/id/eprint/72581/1/__smbhome.uscs.susx.ac.uk_bw233_Desktop_SRO_SRO%20-%20Kathy%20Romer_stx2929.pdf https://doi.org/10.1093/mnras/stx2929 |
long_lat |
ENVELOPE(-130.771,-130.771,64.467,64.467) |
geographic |
Source Peaks South Pole |
geographic_facet |
Source Peaks South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
http://sro.sussex.ac.uk/id/eprint/72581/1/__smbhome.uscs.susx.ac.uk_bw233_Desktop_SRO_SRO%20-%20Kathy%20Romer_stx2929.pdf Klein, M, Mohr, J J, Desai, S, Israel, H, Allam, S, Benoit-Lévy, A, Brokks, 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, Tarle, G, Romer, A K and The DES Collaboration, (2017) 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). pp. 3324-3343. ISSN 0035-8711 |
op_doi |
https://doi.org/10.1093/mnras/stx2929 |
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Monthly Notices of the Royal Astronomical Society |
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474 |
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3 |
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3324 |
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3343 |
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