QSO Candidates in the LMC (Kim+, 2012) ================================================================================ QSO Selection Algorithm Using Time Variability and Machine Learning A Refined QSO Selection Method Using Diagnostics Tests Kim D.-W., Protopapas P., Byun Y.-I., Alcock C., Khardon R., Trichas M. Kim D.-W., Protopapas P., Trichas M., Rowan-Robinson M., Khardon R., Alcock C., Byun Y.-I.=2011ApJ...735..68K =2012ApJ...xxx..xxxC ================================================================================ ADC_Keywords: QSOs ; Active gal. nuclei ; Magellanic Clouds ; Photometry, CCD ; Photometry, 102, 65, 62 ; X-ray sources ; Surveys Keywords: Magellanic Clouds - methods: data analysis - quasars: general Description: We present a catalog the 2,566 QSO candidates in the LMC fields. In these catalogs, we complied number of properties of the objects including RA, Dec, crossmatched IDs with several catalogs, magnitudes, photometric redshifts, etc. See Kim et al. (2011) for the SVM (a.k.a Support Vector Machine) QSO classification model based on the time variability of lightcurves. We used the model to select the 2,566 QSO candidates. In our recent work (Kim et al. 2012), we employed multiple diagnostics, such as X-ray flux, mid-IR color and AGN SED fitting, in order to select 663 promising QSO candidates among the 2,566 candidates. These candidates are flagged in the catalog. Note that we calibrated the MACHO RA and Dec of the candidates using the UCAC3 catalog and improved the average astrometric accuracy from ~3'' to ~0.5''. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table2.dat 486 2566 QSO candidates in the LMC fields -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1-13 A13 --- MACHOID MACHO ID 15-22 F8.5 deg RAdeg Right Ascension (J2000) 24-32 F9.5 deg DEdeg Declination (J2000) 34-38 F5.2 mag MACHOVmag MACHO apparent V magnitude 40-44 F5.2 mag MACHORmag MACHO apparent R magnitude 46-50 F5.2 --- Comb-prob product of SVM probability of B and R band 52-56 F5.2 --- Prob-B SVM probability of MACHO B band lightcurve 58-62 F5.2 --- Prob-R SVM probability of MACHO R band lightcurve 64-72 F9.6 deg UB1-RAdeg ? USNOB1.0 Right Ascension (J2000) 74-83 F10.6 deg UB1-DEdeg ? USNOB1.0 Declination (J2000) 85-89 F5.2 mag UB1-Rmag ? USNOB1.0 apparent R magnitude 91-102 A12 --- UB1ID USNOB1.0 ID 104-109 F6.3 mag Umag ? Apparent U magnitude 111-115 F5.3 mag e_Umag ? Mean error on Umag 117-122 F6.3 mag Bmag ? Apparent B magnitude 124-128 F5.3 mag e_Bmag ? Mean error on Bmag 130-135 F6.3 mag Vmag ? Apparent V magnitude 137-141 F5.3 mag e_Vmag ? Mean error on Vmag 143-148 F6.3 mag Imag ? Apparent I magnitude 150-154 F5.3 mag e_Imag ? Mean error on Imag 156-171 A16 --- TMCID 2MASS ID 173-178 F6.3 mag Jmag ? 2MASS J magnitude 180-185 F6.3 mag e_Jmag ? Mean error on Jmag 187-192 F6.3 mag Hmag ? 2MASS H magnitude 194-199 F6.3 mag e_Hmag ? Mean error on Hmag 201-206 F6.3 mag Kmag ? 2MASS K magnitude 208-213 F6.3 mag e_Kmag ? Mean error on Kmag 215-224 I10 --- SAGEID ? SAGE ID 226-231 F6.3 mag 3.6mag ? SAGE 3.6 magnitude 233-238 F6.3 mag e_3.6mag ? Mean error on 3.6mag 240-245 F6.3 mag 4.5mag ? SAGE 4.5 magnitude 247-252 F6.3 mag e_4.5mag ? Mean error on 4.5mag 254-259 F6.3 mag 5.8mag ? SAGE 5.8 magnitude 261-266 F6.3 mag e_5.8mag ? Mean error on 5.8mag 268-273 F6.3 mag 8.0mag ? SAGE 8.0 magnitude 275-280 F6.3 mag e_8.0mag ? Mean error on 8.0mag 282-297 A16 --- ChandraID Chandra ID 299-308 E10.4 mW/m2 Flux1 ? Chandra flux in 0.5-2 keV band 310-318 E9.3 mW/m2 Flux2 ? Chandra flux in 2-7 keV band 320-340 A21 --- XMMID XMM ID 342-353 E12.4 mW/m2 Flux3 ? XMM flux in 0.5-2 keV band 355-364 E10.4 mW/m2 Flux4 ? XMM flux in 2-4.5 keV band 366-375 E10.4 mW/m2 Flux5 ? XMM flux in 4.5-12 keV band 377-392 A16 --- RosatFaintID Rosat all-sky survey faint source ID 394-397 F4.2 --- photometric-z ? photometric redshift 399-410 F12.10 10-7W Chandra-lx ? Chandra luminosity 412-432 E21.16 10-7W XMM-lx ? XMM luminosity 434-437 A4 --- SAGE-flag SAGE flag (1) 439 A1 --- stellar-flag Stellar flag (2) 441 A1 --- photo-flag Photometric-redshift flag (3) 443-448 F6.2 --- chi-2-flag ? From SED fitting; -1 = No fitting 450-451 A2 --- Xray-flag X-ray source flag (4) 453 I1 --- high-conf-flag ? 1: high confidence QSOs 455-468 A14 --- OGLEID-QSO Crossmatched QSOs (5) 470-486 A15 --- OGLEID-non-QSO Crossmatched QSOs (6) -------------------------------------------------------------------------------- Note (1): Combination of QSO, YSO, OUT and A, B, C. OUT and C means outside the AGN regions (Kozlowski & Kochanek, 2009). NOCP means "No Counterparts". Note (2): A = non-stellar (QSO, AGN, galaxy); B = stellar; N = No Counterpart. Note (3): Q = QSO; G = Galaxy; S = Star; N = No Counterpart. Note (4): Combination of: X = XMM source; C = Chandra source; Q = QSO; A = AGN; G = Galaxy. Note (5): Using newly confirmed QSOs from Kozlowski et al. (2011). Note (6): Using newly confirmed non-QSOs from Kozlowski et al. (2011). --------------------------------------------------------------------------------