| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | plutao.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | J8LNKAN8RW/3AFLCF2 |
| Repository | dpi.inpe.br/plutao/2011/09.22.18.53.33 (restricted access) |
| Last Update | 2011:10.18.13.35.04 (UTC) administrator |
| Metadata Repository | dpi.inpe.br/plutao/2011/09.22.18.53.34 |
| Metadata Last Update | 2022:03.08.17.47.25 (UTC) administrator |
| DOI | 10.1088/0004-6256/141/6/189 |
| ISSN | 0004-6256 |
| Label | lattes: 6593994541517752 8 VasconcellosCLCVTR:2011:DeTrCl |
| Citation Key | VasconcellosCGLCCTR:2011:DeTrCl |
| Title | Decision Tree Classifiers for Star/Galaxy Separation  |
| Year | 2011 |
| Access Date | 2024, May 17 |
| Secondary Type | PRE PI |
| Number of Files | 1 |
| Size | 1047 KiB |
| 2. Context | |
| Author | 1 Vasconcellos, Eduardo Charles 2 Carvalho, Reinaldo Ramos de 3 Gal, R. R. 4 Labarbera, Francesco 5 Capelato, Hugo Vicente 6 Campos Velho, Haroldo Fraga de 7 Trevisan, Marina 8 Ruiz, Renata Sampaio da Rocha |
| Resume Identifier | 1 2 8JMKD3MGP5W/3C9JJ5B 3 4 5 8JMKD3MGP5W/3C9JHCT 6 8JMKD3MGP5W/3C9JHC3 |
| Group | 1 2 DAS-CEA-INPE-MCT-BR 3 4 5 DAS-CEA-INPE-MCT-BR 6 LAC-CTE-INPE-MCT-BR 7 8 LAC-CTE-INPE-MCT-BR |
| Affiliation | 1 2 Instituto Nacional de Pesquisas Espaciais (INPE) 3 Institute for Astronomy, University of Hawaii, 2680 Woodlawn Dr., Honolulu, HI 96822, USA 4 INAF-Osservatorio Astronomico di Capodimonte, via Moiariello 16, Napoli 80131, Italy 5 Instituto Nacional de Pesquisas Espaciais (INPE) 6 Instituto Nacional de Pesquisas Espaciais (INPE) 7 IAG, University of S˜ao Paulo, Rua do Mat˜ao 1226, S˜ao Paulo 05508-090, Brazil 8 Instituto Nacional de Pesquisas Espaciais (INPE) |
| Author e-Mail Address | 1 2 3 4 5 6 7 8 renata@lac.inpe.br |
| e-Mail Address | renata@lac.inpe.br |
| Journal | Astronomical Journal |
| Volume | 141 |
| Number | 6 |
| Pages | 189 |
| Secondary Mark | A2_ASTRONOMIA_/_FÍSICA |
| History (UTC) | 2011-09-23 14:11:19 :: lattes -> administrator :: 2011 2011-09-24 20:23:35 :: administrator -> secretaria.cpa@dir.inpe.br :: 2011 2011-10-18 13:35:04 :: secretaria.cpa@dir.inpe.br -> administrator :: 2011 2011-11-17 15:03:48 :: administrator -> banon :: 2011 2011-11-18 17:12:53 :: banon -> administrator :: 2011 2012-08-12 18:27:05 :: administrator -> secretaria.cpa@dir.inpe.br :: 2011 2012-09-24 17:27:37 :: secretaria.cpa@dir.inpe.br -> administrator :: 2011 2022-03-08 17:47:25 :: administrator -> marciana :: 2011 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Content Type | External Contribution |
| Version Type | publisher |
| Keywords | catalogs methods: data analysis surveys virtual observatory tools |
| Abstract | We study the star/galaxy classification efficiency of 13 different decision tree algorithms applied to photometric objects in the Sloan Digital Sky Survey Data Release Seven (SDSS-DR7). Each algorithm is defined by a set of parameters which, when varied, produce different final classification trees. We extensively explore the parameter space of each algorithm, using the set of 884,126 SDSS objects with spectroscopic data as the training set. The efficiency of star-galaxy separation is measured using the completeness function. We find that the Functional Tree algorithm (FT) yields the best results as measured by the mean completeness in two magnitude intervals: 14 ≤ r ≤ 21 (85.2%) and r ≥ 19 (82.1%). We compare the performance of the tree generated with the optimal FT configuration to the classifications provided by the SDSS parametric classifier, 2DPHOT, and Ball et al. We find that our FT classifier is comparable to or better in completeness over the full magnitude range 15 ≤ r ≤ 21, with much lower contamination than all but the Ball et al. classifier. At the faintest magnitudes (r > 19), our classifier is the only one that maintains high completeness (>80%) while simultaneously achieving low contamination (~2.5%). We also examine the SDSS parametric classifier (psfMag modelMag) to see if the dividing line between stars and galaxies can be adjusted to improve the classifier. We find that currently stars in close pairs are often misclassified as galaxies, and suggest a new cut to improve the classifier. Finally, we apply our FT classifier to separate stars from galaxies in the full set of 69,545,326 SDSS photometric objects in the magnitude range 14 ≤ r ≤ 21. |
| Area | CEA |
| Arrangement 1 | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > LABAC > Decision Tree Classifiers... |
| Arrangement 2 | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDAS > Decision Tree Classifiers... |
| doc Directory Content | access |
| source Directory Content | there are no files |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| Language | en |
| Target File | 1538-3881_141_6_189.pdf |
| User Group | administrator banon lattes secretaria.cpa@dir.inpe.br |
| Reader Group | administrator secretaria.cpa@dir.inpe.br |
| Visibility | shown |
| Archiving Policy | denypublisher denyfinaldraft |
| Read Permission | deny from all and allow from 150.163 |
| Update Permission | not transferred |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/3ESGTTP 8JMKD3MGPCW/3ETR8EH |
| Citing Item List | sid.inpe.br/mtc-m21/2012/07.13.14.49.40 3 sid.inpe.br/bibdigital/2013/09.22.23.14 3 sid.inpe.br/mtc-m21/2012/07.13.14.50.04 1 |
| Dissemination | WEBSCI; PORTALCAPES. |
| Host Collection | dpi.inpe.br/plutao@80/2008/08.19.15.01 |
| 6. Notes | |
| Empty Fields | alternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel format isbn lineage mark mirrorrepository month nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress project rightsholder schedulinginformation secondarydate secondarykey session shorttitle sponsor subject tertiarymark tertiarytype typeofwork url |
| 7. Description control | |
| e-Mail (login) | marciana |
| update | |